Merge branch 'master' of ssh://gitea.communiquons.org:52001/pierre/SolarEnergy

Reviewed-on: #10

.drone.yml

@@ -0,0 +1,70 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: web_build
+    image: node:21
+    volumes:
+      - name: web_app
+        path: /tmp/web_build
+    commands:
+      - cd central_frontend
+      - npm install
+      - npm run build
+      - mv dist /tmp/web_build
+
+  - name: backend_check
+    image: rust
+    volumes:
+      - name: rust_registry
+        path: /usr/local/cargo/registry
+    commands:
+      - rustup component add clippy
+      - cd central_backend
+      - cargo clippy -- -D warnings
+      - cargo test
+
+  - name: custom_consumption_check
+    image: rust
+    volumes:
+      - name: rust_registry
+        path: /usr/local/cargo/registry
+    commands:
+      - rustup component add clippy
+      - cd custom_consumption
+      - cargo clippy -- -D warnings
+      - cargo test
+    depends_on:
+      - backend_check
+
+  - name: backend_compile
+    image: rust
+    volumes:
+      - name: rust_registry
+        path: /usr/local/cargo/registry
+      - name: web_app
+        path: /tmp/web_build
+    depends_on:
+      - backend_check
+      - web_build
+    commands:
+      - cd central_backend
+      - mv /tmp/web_build/dist static
+      - cargo build --release
+      - ls -lah target/release/central_backend
+
+  - name: esp32_compile
+    image: espressif/idf:v5.3.1
+    commands:
+      - cd esp32_device
+      - /opt/esp/entrypoint.sh idf.py build
+      - ls -lah build/main.bin
+
+
+volumes:
+  - name: rust_registry
+    temp: {}
+  - name: web_app
+    temp: {}

LICENSE

@@ -0,0 +1,675 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
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+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
+

README.md

@@ -1,2 +1,18 @@
 # SolarEnergy
-WIP project
+A project to optimize solar energy production and consumption. It connect to a current meter to decides whether some appliances controlled by relays shall be turned on or not, based on criterias such as:
+* Minimal uptime
+* Minimal downtime
+* Daily minimal runtime
+* Estimated consumption
+* Dependencies, conflicts
+
+## Components
+* [`central_backend`](./central_backend): The core component that connects all the other one and make the decisions to turn on or off devices
+* [`central_frontend`](./central_frontend): Web UI to configure the devices and monitor them
+* [`custom_consumtion`](./custom_consumption): Development tool used to test different production values
+* [`esp32_device`](./esp32_device/): The code installed in the MCU that controls relays (Wt32-Eth01 devices)
+* [`python_device`](./python_device/): An alternative to the esp32 to control relays. Not production ready.
+
+## Documentation
+* [Setup for development](./docs/SETUP_DEV.md) guide
+* [Setup for production](./docs/SETUP_PROD.md) guide

central_backend/Cargo.toml

@@ -7,26 +7,28 @@ edition = "2021"
 log = "0.4.22"
 env_logger = "0.11.5"
 lazy_static = "1.5.0"
-clap = { version = "4.5.18", features = ["derive", "env"] }
+dotenvy = "0.15.7"
+clap = { version = "4.5.20", features = ["derive", "env"] }
 anyhow = "1.0.89"
-thiserror = "1.0.63"
+thiserror = "1.0.64"
 openssl = { version = "0.10.66" }
 openssl-sys = "0.9.102"
-libc = "0.2.158"
+libc = "0.2.159"
 foreign-types-shared = "0.1.1"
 asn1 = "0.17"
 actix-web = { version = "4", features = ["openssl"] }
-futures = "0.3.30"
+futures = "0.3.31"
 serde = { version = "1.0.210", features = ["derive"] }
-reqwest = "0.12.7"
+reqwest = { version = "0.12.7", features = ["json"] }
 serde_json = "1.0.128"
 rand = "0.8.5"
 actix = "0.13.5"
 actix-identity = "0.8.0"
 actix-session = { version = "0.10.1", features = ["cookie-session"] }
 actix-cors = "0.7.0"
+actix-multipart = { version ="0.7.2", features = ["derive"] }
 actix-remote-ip = "0.1.0"
-futures-util = "0.3.30"
+futures-util = "0.3.31"
 uuid = { version = "1.10.0", features = ["v4", "serde"] }
 semver = { version = "1.0.23", features = ["serde"] }
 lazy-regex = "3.3.0"
@@ -39,3 +41,4 @@ prettytable-rs = "0.10.0"
 chrono = "0.4.38"
 serde_yml = "0.0.12"
 bincode = "=2.0.0-rc.3"
+fs4 = { version = "0.10.0", features = ["sync"] }

central_backend/src/app_config.rs

@@ -1,4 +1,5 @@
 use crate::devices::device::{DeviceId, DeviceRelayID};
+use crate::ota::ota_update::OTAPlatform;
 use clap::{Parser, Subcommand};
 use std::path::{Path, PathBuf};
 
@@ -34,12 +35,27 @@ pub enum ConsumptionBackend {
         #[clap(short, long, default_value = "/dev/shm/consumption.txt")]
         path: String,
     },
+
+    /// Fronius inverter consumption
+    Fronius {
+        /// The origin of the domain where the webserver of the Fronius Symo can be reached
+        #[clap(short, long, env)]
+        fronius_orig: String,
+
+        /// Use cURL instead of reqwest to perform request
+        #[clap(short, long)]
+        curl: bool,
+    },
 }
 
 /// Solar system central backend
 #[derive(Parser, Debug)]
 #[command(version, about, long_about = None)]
 pub struct AppConfig {
+    /// Read arguments from env file
+    #[clap(short, long, env)]
+    pub config: Option<String>,
+
     /// Proxy IP, might end with a star "*"
     #[clap(short, long, env)]
     pub proxy_ip: Option<String>,
@@ -106,6 +122,21 @@ lazy_static::lazy_static! {
 }
 
 impl AppConfig {
+    /// Parse environment variables from file, if requedst
+    pub fn parse_env_file() -> anyhow::Result<()> {
+        if let Some(c) = Self::parse().config {
+            log::info!("Load additional environment variables from {c}");
+            let conf_file = Path::new(&c);
+
+            if !conf_file.is_file() {
+                panic!("Specified configuration is not a file!");
+            }
+            dotenvy::from_path(conf_file)?;
+        }
+
+        Ok(())
+    }
+
     /// Get parsed command line arguments
     pub fn get() -> &'static AppConfig {
         &ARGS
@@ -283,6 +314,31 @@ impl AppConfig {
                 }
             ))
     }
+
+    /// Get logs directory
+    pub fn logs_dir(&self) -> PathBuf {
+        self.storage_path().join("logs")
+    }
+
+    /// Get the logs for a given day
+    pub fn log_of_day(&self, day: u64) -> PathBuf {
+        self.logs_dir().join(format!("{day}.log"))
+    }
+
+    /// Get the directory that will store OTA updates
+    pub fn ota_dir(&self) -> PathBuf {
+        self.storage_path().join("ota")
+    }
+
+    /// Get the directory that will store OTA updates for a given platform
+    pub fn ota_platform_dir(&self, platform: OTAPlatform) -> PathBuf {
+        self.ota_dir().join(platform.to_string())
+    }
+
+    /// Get the path to the file that will contain an OTA update
+    pub fn path_ota_update(&self, platform: OTAPlatform, version: &semver::Version) -> PathBuf {
+        self.ota_platform_dir(platform).join(version.to_string())
+    }
 }
 
 #[cfg(test)]

central_backend/src/constants.rs

@@ -13,6 +13,9 @@ pub const MAX_INACTIVITY_DURATION: u64 = 3600;
 /// Maximum session duration (1 day)
 pub const MAX_SESSION_DURATION: u64 = 3600 * 24;
 
+/// Maximum firmware size (in bytes)
+pub const MAX_FIRMWARE_SIZE: usize = 50 * 1000 * 1000;
+
 /// List of routes that do not require authentication
 pub const ROUTES_WITHOUT_AUTH: [&str; 2] =
     ["/web_api/server/config", "/web_api/auth/password_auth"];

central_backend/src/devices/device.rs

@@ -9,9 +9,9 @@ use std::collections::{HashMap, HashSet};
 #[derive(Clone, Debug, serde::Serialize, serde::Deserialize)]
 pub struct DeviceInfo {
     /// Device reference
-    reference: String,
+    pub reference: String,
     /// Device firmware / software version
-    version: semver::Version,
+    pub version: semver::Version,
     /// Maximum number of relay that the device can support
     pub max_relays: usize,
 }
@@ -62,6 +62,9 @@ pub struct Device {
     ///
     /// There cannot be more than [info.max_relays] relays
     pub relays: Vec<DeviceRelay>,
+    /// Desired version, ie. the version of the software we would to seen run on the device
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub desired_version: Option<semver::Version>,
 }
 
 /// Structure that contains information about the minimal expected execution

central_backend/src/devices/devices_list.rs

@@ -84,6 +84,7 @@ impl DevicesList {
             validated: false,
             enabled: false,
             relays: vec![],
+            desired_version: None,
         };
 
         // First, write CSR
@@ -115,6 +116,11 @@ impl DevicesList {
         self.0.clone().into_values().collect()
     }
 
+    /// Get a reference on the full list of devices
+    pub fn full_list_ref(&self) -> Vec<&Device> {
+        self.0.values().collect()
+    }
+
     /// Get the information about a single device
     pub fn get_single(&self, id: &DeviceId) -> Option<Device> {
         self.0.get(id).cloned()
@@ -181,6 +187,24 @@ impl DevicesList {
         Ok(())
     }
 
+    /// Set a device desired version
+    pub fn set_desired_version(
+        &mut self,
+        id: &DeviceId,
+        version: Option<semver::Version>,
+    ) -> anyhow::Result<()> {
+        let dev = self
+            .0
+            .get_mut(id)
+            .ok_or(DevicesListError::UpdateDeviceFailedDeviceNotFound)?;
+
+        dev.desired_version = version;
+
+        self.persist_dev_config(id)?;
+
+        Ok(())
+    }
+
     /// Get single certificate information
     fn get_cert(&self, id: &DeviceId) -> anyhow::Result<X509> {
         let dev = self

central_backend/src/energy/consumption.rs

@@ -9,10 +9,36 @@ pub enum ConsumptionError {
     NonExistentFile,
     #[error("The file that should contain the consumption has an invalid content!")]
     FileInvalidContent(#[source] ParseIntError),
+    #[error("Failed to execute cURL request!")]
+    CurlReqFailed,
 }
 
 pub type EnergyConsumption = i32;
 
+#[derive(serde::Deserialize)]
+struct FroniusResponse {
+    #[serde(rename = "Body")]
+    body: FroniusResponseBody,
+}
+
+#[derive(serde::Deserialize)]
+struct FroniusResponseBody {
+    #[serde(rename = "Data")]
+    data: FroniusResponseBodyData,
+}
+
+#[derive(serde::Deserialize)]
+struct FroniusResponseBodyData {
+    #[serde(rename = "Site")]
+    site: FroniusResponseSite,
+}
+
+#[derive(serde::Deserialize)]
+struct FroniusResponseSite {
+    #[serde(rename = "P_Grid")]
+    grid_production: f64,
+}
+
 /// Get current electrical energy consumption
 pub async fn get_curr_consumption() -> anyhow::Result<EnergyConsumption> {
     let backend = AppConfig::get()
@@ -38,5 +64,24 @@ pub async fn get_curr_consumption() -> anyhow::Result<EnergyConsumption> {
                 .parse()
                 .map_err(ConsumptionError::FileInvalidContent)?)
         }
+
+        ConsumptionBackend::Fronius { fronius_orig, curl } => {
+            let url = format!("{fronius_orig}/solar_api/v1/GetPowerFlowRealtimeData.fcgi");
+
+            let response = match curl {
+                false => reqwest::get(url).await?.json::<FroniusResponse>().await?,
+                true => {
+                    let res = std::process::Command::new("curl").arg(url).output()?;
+
+                    if !res.status.success() {
+                        return Err(ConsumptionError::CurlReqFailed.into());
+                    }
+
+                    serde_json::from_slice::<FroniusResponse>(&res.stdout)?
+                }
+            };
+
+            Ok(response.body.data.site.grid_production as i32)
+        }
     }
 }

central_backend/src/energy/consumption_cache.rs

@@ -1,5 +1,6 @@
 use crate::constants;
 use crate::energy::consumption::EnergyConsumption;
+use crate::utils::math_utils::median;
 
 pub struct ConsumptionCache {
     nb_vals: usize,
@@ -27,13 +28,7 @@ impl ConsumptionCache {
             return constants::FALLBACK_PRODUCTION_VALUE;
         }
 
-        let mut clone = self.values.clone();
-        clone.sort();
-        let median = clone[clone.len() / 2];
-
-        log::info!("Cached consumption: {:?} / Median: {}", self.values, median);
-
-        median
+        median(&self.values)
     }
 }
 

central_backend/src/energy/consumption_history_file.rs

@@ -1,5 +1,6 @@
 use crate::app_config::{AppConfig, ConsumptionHistoryType};
 use crate::energy::consumption::EnergyConsumption;
+use crate::utils::math_utils::median;
 use crate::utils::time_utils::day_number;
 
 const TIME_INTERVAL: usize = 10;
@@ -97,16 +98,48 @@ impl ConsumptionHistoryFile {
         )?;
         Ok(())
     }
+
+    /// Get the total runtime of a relay during a given time window
+    pub fn get_history(
+        r#type: ConsumptionHistoryType,
+        from: u64,
+        to: u64,
+        interval: u64,
+    ) -> anyhow::Result<Vec<EnergyConsumption>> {
+        let mut res = Vec::with_capacity(((to - from) / interval) as usize);
+        let mut file = Self::open(from, r#type)?;
+        let mut curr_time = from;
+
+        let mut intermediate_values = Vec::new();
+        while curr_time < to {
+            if !file.contains_time(curr_time) {
+                file = Self::open(curr_time, r#type)?;
+            }
+
+            intermediate_values.push(file.get_consumption(curr_time)?);
+
+            if curr_time % interval == from % interval {
+                res.push(median(&intermediate_values));
+                intermediate_values = Vec::new();
+            }
+
+            curr_time += TIME_INTERVAL as u64;
+        }
+
+        Ok(res)
+    }
 }
 
 #[cfg(test)]
 mod tests {
+    use crate::app_config::ConsumptionHistoryType;
     use crate::energy::consumption::EnergyConsumption;
     use crate::energy::consumption_history_file::{ConsumptionHistoryFile, TIME_INTERVAL};
 
     #[test]
     fn test_consumption_history() {
-        let mut history = ConsumptionHistoryFile::new_memory(0);
+        let mut history =
+            ConsumptionHistoryFile::new_memory(0, ConsumptionHistoryType::GridConsumption);
 
         for i in 0..50 {
             assert_eq!(

central_backend/src/energy/energy_actor.rs

@@ -53,7 +53,7 @@ impl EnergyActor {
             });
         self.consumption_cache.add_value(latest_consumption);
 
-        let devices_list = self.devices.full_list();
+        let devices_list = self.devices.full_list_ref();
 
         let mut history =
             ConsumptionHistoryFile::open(time_secs(), ConsumptionHistoryType::GridConsumption)?;
@@ -119,7 +119,21 @@ impl Handler<GetCurrConsumption> for EnergyActor {
     }
 }
 
-/// Get current consumption
+/// Get relays consumption
+#[derive(Message)]
+#[rtype(result = "usize")]
+pub struct RelaysConsumption;
+
+impl Handler<RelaysConsumption> for EnergyActor {
+    type Result = usize;
+
+    fn handle(&mut self, _msg: RelaysConsumption, _ctx: &mut Context<Self>) -> Self::Result {
+        self.engine
+            .sum_relays_consumption(&self.devices.full_list_ref())
+    }
+}
+
+/// Check if device exists
 #[derive(Message)]
 #[rtype(result = "bool")]
 pub struct CheckDeviceExists(pub DeviceId);
@@ -181,6 +195,27 @@ impl Handler<UpdateDeviceGeneralInfo> for EnergyActor {
     }
 }
 
+/// Set device desired version
+#[derive(Message)]
+#[rtype(result = "anyhow::Result<()>")]
+pub struct SetDesiredVersion(pub DeviceId, pub Option<semver::Version>);
+
+impl Handler<SetDesiredVersion> for EnergyActor {
+    type Result = anyhow::Result<()>;
+
+    fn handle(&mut self, msg: SetDesiredVersion, _ctx: &mut Context<Self>) -> Self::Result {
+        log::info!(
+            "Requested to update device desired version {:?} => {:#?}",
+            &msg.0,
+            &msg.1
+        );
+
+        self.devices.set_desired_version(&msg.0, msg.1)?;
+
+        Ok(())
+    }
+}
+
 /// Delete a device
 #[derive(Message)]
 #[rtype(result = "anyhow::Result<()>")]
@@ -364,8 +399,8 @@ impl Handler<GetDevicesState> for EnergyActor {
 #[derive(serde::Serialize)]
 pub struct ResRelayState {
     pub id: DeviceRelayID,
-    on: bool,
-    r#for: usize,
+    pub on: bool,
+    pub r#for: usize,
 }
 
 /// Get the state of all relays

central_backend/src/energy/engine.rs

@@ -8,7 +8,7 @@ use crate::devices::device::{Device, DeviceId, DeviceRelay, DeviceRelayID};
 use crate::energy::consumption::EnergyConsumption;
 use crate::energy::relay_state_history;
 use crate::energy::relay_state_history::RelayStateHistory;
-use crate::utils::time_utils::{curr_hour, time_secs, time_start_of_day};
+use crate::utils::time_utils::{curr_hour, time_secs};
 
 #[derive(Default)]
 pub struct DeviceState {
@@ -55,7 +55,7 @@ pub struct EnergyEngine {
 
 impl DeviceRelay {
     // Note : this function is not recursive
-    fn has_running_dependencies(&self, s: &RelaysState, devices: &[Device]) -> bool {
+    fn has_running_dependencies(&self, s: &RelaysState, devices: &[&Device]) -> bool {
         for d in devices {
             for r in &d.relays {
                 if r.depends_on.contains(&self.id) && s.get(&r.id).unwrap().is_on() {
@@ -72,7 +72,7 @@ impl DeviceRelay {
         self.depends_on.iter().any(|id| s.get(id).unwrap().is_off())
     }
 
-    fn is_having_conflict(&self, s: &RelaysState, devices: &[Device]) -> bool {
+    fn is_having_conflict(&self, s: &RelaysState, devices: &[&Device]) -> bool {
         if self
             .conflicts_with
             .iter()
@@ -94,7 +94,7 @@ impl DeviceRelay {
     }
 }
 
-fn sum_relays_consumption(state: &RelaysState, devices: &[Device]) -> usize {
+fn sum_relays_consumption(state: &RelaysState, devices: &[&Device]) -> usize {
     let mut consumption = 0;
 
     for d in devices {
@@ -119,11 +119,11 @@ impl EnergyEngine {
         self.relays_state.get_mut(&relay_id).unwrap()
     }
 
-    pub fn sum_relays_consumption(&self, devices: &[Device]) -> usize {
+    pub fn sum_relays_consumption(&self, devices: &[&Device]) -> usize {
         sum_relays_consumption(&self.relays_state, devices)
     }
 
-    fn print_summary(&mut self, curr_consumption: EnergyConsumption, devices: &[Device]) {
+    fn print_summary(&mut self, curr_consumption: EnergyConsumption, devices: &[&Device]) {
         log::info!("Current consumption: {curr_consumption}");
 
         let mut table = Table::new();
@@ -172,13 +172,13 @@ impl EnergyEngine {
     pub fn estimated_consumption_without_relays(
         &self,
         curr_consumption: EnergyConsumption,
-        devices: &[Device],
+        devices: &[&Device],
     ) -> EnergyConsumption {
         curr_consumption - self.sum_relays_consumption(devices) as i32
     }
 
     /// Refresh energy engine; this method shall never fail !
-    pub fn refresh(&mut self, curr_consumption: EnergyConsumption, devices: &[Device]) {
+    pub fn refresh(&mut self, curr_consumption: EnergyConsumption, devices: &[&Device]) {
         let base_production = self.estimated_consumption_without_relays(curr_consumption, devices);
         log::info!("Estimated base production: {base_production}");
 
@@ -283,12 +283,7 @@ impl EnergyEngine {
                     continue;
                 }
 
-                let time_start_day = time_start_of_day().unwrap_or(1726696800);
-                let start_time = time_start_day + constraints.reset_time as u64;
-                let end_time = time_start_day + 3600 * 24 + constraints.reset_time as u64;
-                let total_runtime =
-                    relay_state_history::relay_total_runtime(r.id, start_time, end_time)
-                        .unwrap_or(3600 * 24);
+                let total_runtime = relay_state_history::relay_total_runtime_adjusted(r);
 
                 if total_runtime > constraints.min_runtime {
                     continue;
@@ -366,7 +361,7 @@ impl EnergyEngine {
     }
 
     /// Save relays state to disk
-    pub fn persist_relays_state(&mut self, devices: &[Device]) -> anyhow::Result<()> {
+    pub fn persist_relays_state(&mut self, devices: &[&Device]) -> anyhow::Result<()> {
         // Save all relays state
         for d in devices {
             for r in &d.relays {
@@ -454,7 +449,7 @@ mod test {
     fn run_test(name: &str, conf: &str) {
         let (devices, mut energy_engine, consumption, states) = parse_test_config(conf);
 
-        energy_engine.refresh(consumption, &devices);
+        energy_engine.refresh(consumption, &devices.iter().collect::<Vec<_>>());
 
         for (device_s, device) in states.iter().zip(&devices) {
             for (relay_s, relay) in device_s.relays.iter().zip(&device.relays) {

central_backend/src/energy/relay_state_history.rs

@@ -1,7 +1,7 @@
 use crate::app_config::AppConfig;
-use crate::devices::device::DeviceRelayID;
+use crate::devices::device::{DeviceRelay, DeviceRelayID};
 use crate::utils::files_utils;
-use crate::utils::time_utils::day_number;
+use crate::utils::time_utils::{day_number, time_start_of_day};
 
 const TIME_INTERVAL: usize = 30;
 
@@ -119,6 +119,20 @@ pub fn relay_total_runtime(device_id: DeviceRelayID, from: u64, to: u64) -> anyh
     Ok(total)
 }
 
+/// Get the total runtime of a relay taking account of daily reset time
+pub fn relay_total_runtime_adjusted(relay: &DeviceRelay) -> usize {
+    let reset_time = relay
+        .daily_runtime
+        .as_ref()
+        .map(|r| r.reset_time)
+        .unwrap_or(0);
+
+    let time_start_day = time_start_of_day().unwrap_or(1726696800);
+    let start_time = time_start_day + reset_time as u64;
+    let end_time = time_start_day + 3600 * 24 + reset_time as u64;
+    relay_total_runtime(relay.id, start_time, end_time).unwrap_or(3600 * 24)
+}
+
 #[cfg(test)]
 mod tests {
     use crate::devices::device::DeviceRelayID;

central_backend/src/lib.rs

@@ -3,5 +3,7 @@ pub mod constants;
 pub mod crypto;
 pub mod devices;
 pub mod energy;
+pub mod logs;
+pub mod ota;
 pub mod server;
 pub mod utils;

central_backend/src/logs/log_entry.rs

@@ -0,0 +1,17 @@
+use crate::devices::device::DeviceId;
+use crate::logs::severity::LogSeverity;
+
+#[derive(serde::Serialize, serde::Deserialize, Debug, Clone)]
+pub struct LogEntry {
+    /// If no device is specified then the message comes from the backend
+    pub device_id: Option<DeviceId>,
+    pub time: u64,
+    pub severity: LogSeverity,
+    pub message: String,
+}
+
+impl LogEntry {
+    pub fn serialize(&self) -> anyhow::Result<String> {
+        Ok(serde_json::to_string(self)?)
+    }
+}

central_backend/src/logs/logs_manager.rs

@@ -0,0 +1,58 @@
+use crate::app_config::AppConfig;
+use crate::devices::device::DeviceId;
+use crate::logs::log_entry::LogEntry;
+use crate::logs::severity::LogSeverity;
+use crate::utils::time_utils::{curr_day_number, time_secs};
+use fs4::fs_std::FileExt;
+use std::fs::OpenOptions;
+use std::io::{Seek, SeekFrom, Write};
+
+pub fn save_log(
+    device: Option<&DeviceId>,
+    severity: LogSeverity,
+    message: String,
+) -> anyhow::Result<()> {
+    let log_path = AppConfig::get().log_of_day(curr_day_number());
+
+    let mut file = OpenOptions::new()
+        .append(true)
+        .create(true)
+        .open(&log_path)?;
+
+    file.lock_exclusive()?;
+    file.seek(SeekFrom::End(0))?;
+    file.write_all(
+        format!(
+            "{}\n",
+            (LogEntry {
+                device_id: device.cloned(),
+                time: time_secs(),
+                severity,
+                message,
+            })
+            .serialize()?
+        )
+        .as_bytes(),
+    )?;
+    file.flush()?;
+    file.unlock()?;
+
+    Ok(())
+}
+
+/// Make a logs extraction
+pub fn get_logs(day: u64) -> anyhow::Result<Vec<LogEntry>> {
+    let file = AppConfig::get().log_of_day(day);
+
+    if !file.exists() {
+        return Ok(Vec::new());
+    }
+
+    let content = std::fs::read_to_string(file)?
+        .split('\n')
+        .filter(|l| !l.is_empty())
+        .map(serde_json::from_str)
+        .collect::<Result<Vec<_>, _>>()?;
+
+    Ok(content)
+}

central_backend/src/logs/mod.rs

@@ -0,0 +1,3 @@
+pub mod log_entry;
+pub mod logs_manager;
+pub mod severity;

central_backend/src/logs/severity.rs

@@ -0,0 +1,7 @@
+#[derive(serde::Serialize, serde::Deserialize, Copy, Clone, Debug, PartialOrd, Eq, PartialEq)]
+pub enum LogSeverity {
+    Debug = 0,
+    Info,
+    Warn,
+    Error,
+}

central_backend/src/main.rs

@@ -9,6 +9,9 @@ use tokio_schedule::{every, Job};
 
 #[actix_web::main]
 async fn main() -> std::io::Result<()> {
+    // Load additional config from file, if requested
+    AppConfig::parse_env_file().expect("Failed to parse environment file!");
+
     // Initialize OpenSSL
     openssl_sys::init();
 
@@ -19,6 +22,8 @@ async fn main() -> std::io::Result<()> {
     create_directory_if_missing(AppConfig::get().devices_config_path()).unwrap();
     create_directory_if_missing(AppConfig::get().relays_runtime_stats_storage_path()).unwrap();
     create_directory_if_missing(AppConfig::get().energy_consumption_history()).unwrap();
+    create_directory_if_missing(AppConfig::get().logs_dir()).unwrap();
+    create_directory_if_missing(AppConfig::get().ota_dir()).unwrap();
 
     // Initialize PKI
     pki::initialize_root_ca().expect("Failed to initialize Root CA!");
@@ -42,8 +47,8 @@ async fn main() -> std::io::Result<()> {
         .expect("Failed to initialize energy actor!")
         .start();
 
-    let s1 = servers::secure_server(actor);
-    let s2 = servers::unsecure_server();
+    let s1 = servers::secure_server(actor.clone());
+    let s2 = servers::unsecure_server(actor);
     future::try_join(s1, s2)
         .await
         .expect("Failed to start servers!");

central_backend/src/ota/mod.rs

@@ -0,0 +1,2 @@
+pub mod ota_manager;
+pub mod ota_update;

central_backend/src/ota/ota_manager.rs

@@ -0,0 +1,74 @@
+use crate::app_config::AppConfig;
+use crate::ota::ota_update::{OTAPlatform, OTAUpdate};
+use crate::utils::files_utils;
+use std::os::unix::fs::MetadataExt;
+use std::str::FromStr;
+
+/// Check out whether a given update exists or not
+pub fn update_exists(platform: OTAPlatform, version: &semver::Version) -> anyhow::Result<bool> {
+    Ok(AppConfig::get()
+        .path_ota_update(platform, version)
+        .is_file())
+}
+
+/// Save a new firmware update
+pub fn save_update(
+    platform: OTAPlatform,
+    version: &semver::Version,
+    update: &[u8],
+) -> anyhow::Result<()> {
+    let path = AppConfig::get().path_ota_update(platform, version);
+    files_utils::create_directory_if_missing(path.parent().unwrap())?;
+
+    std::fs::write(path, update)?;
+
+    Ok(())
+}
+
+/// Get the content of an OTA update
+pub fn get_ota_update(platform: OTAPlatform, version: &semver::Version) -> anyhow::Result<Vec<u8>> {
+    let path = AppConfig::get().path_ota_update(platform, version);
+    Ok(std::fs::read(path)?)
+}
+
+/// Delete an OTA update
+pub fn delete_update(platform: OTAPlatform, version: &semver::Version) -> anyhow::Result<()> {
+    let path = AppConfig::get().path_ota_update(platform, version);
+    std::fs::remove_file(path)?;
+    Ok(())
+}
+
+/// Get the list of OTA software updates for a platform
+pub fn get_ota_updates_for_platform(platform: OTAPlatform) -> anyhow::Result<Vec<OTAUpdate>> {
+    let ota_path = AppConfig::get().ota_platform_dir(platform);
+
+    // Check if the directory dedicated to the updates of the platform exists
+    if !ota_path.is_dir() {
+        return Ok(Vec::new());
+    }
+
+    let mut out = Vec::new();
+
+    for e in std::fs::read_dir(ota_path)? {
+        let e = e?;
+
+        out.push(OTAUpdate {
+            platform,
+            version: semver::Version::from_str(e.file_name().to_str().unwrap_or("bad"))?,
+            file_size: e.metadata()?.size(),
+        });
+    }
+
+    Ok(out)
+}
+
+/// Get all the available OTA updates
+pub fn get_all_ota_updates() -> anyhow::Result<Vec<OTAUpdate>> {
+    let mut out = vec![];
+
+    for p in OTAPlatform::supported_platforms() {
+        out.append(&mut get_ota_updates_for_platform(*p)?)
+    }
+
+    Ok(out)
+}

central_backend/src/ota/ota_update.rs

@@ -0,0 +1,38 @@
+use std::fmt::{Display, Formatter};
+use std::str::FromStr;
+
+#[derive(serde::Serialize, serde::Deserialize, Debug, Copy, Clone, Eq, PartialEq)]
+pub enum OTAPlatform {
+    #[serde(rename = "Wt32-Eth01")]
+    Wt32Eth01,
+}
+
+impl OTAPlatform {
+    /// Get the list of supported platforms
+    pub fn supported_platforms() -> &'static [Self] {
+        &[OTAPlatform::Wt32Eth01]
+    }
+}
+
+impl Display for OTAPlatform {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        let s = serde_json::to_string(&self).unwrap().replace('"', "");
+        write!(f, "{s}")
+    }
+}
+
+impl FromStr for OTAPlatform {
+    type Err = anyhow::Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(serde_json::from_str::<Self>(&format!("\"{s}\""))?)
+    }
+}
+
+/// Single OTA update information
+#[derive(serde::Serialize, serde::Deserialize, Debug, Clone, Eq, PartialEq)]
+pub struct OTAUpdate {
+    pub platform: OTAPlatform,
+    pub version: semver::Version,
+    pub file_size: u64,
+}

central_backend/src/server/devices_api/device_logging_controller.rs

@@ -0,0 +1,22 @@
+use crate::logs::logs_manager;
+use crate::logs::severity::LogSeverity;
+use crate::server::custom_error::HttpResult;
+use crate::server::devices_api::jwt_parser::JWTRequest;
+use crate::server::WebEnergyActor;
+use actix_web::{web, HttpResponse};
+
+#[derive(Debug, serde::Deserialize)]
+pub struct LogRequest {
+    severity: LogSeverity,
+    message: String,
+}
+
+/// Report log message from device
+pub async fn report_log(body: web::Json<JWTRequest>, actor: WebEnergyActor) -> HttpResult {
+    let (device, request) = body.parse_jwt::<LogRequest>(actor).await?;
+
+    log::info!("Save log message from device: {request:#?}");
+    logs_manager::save_log(Some(&device.id), request.severity, request.message)?;
+
+    Ok(HttpResponse::Accepted().finish())
+}

central_backend/src/server/devices_api/devices_ota.rs

@@ -0,0 +1,21 @@
+use crate::ota::ota_manager;
+use crate::ota::ota_update::OTAPlatform;
+use crate::server::custom_error::HttpResult;
+use actix_web::{web, HttpResponse};
+
+#[derive(serde::Deserialize)]
+pub struct FirmwarePath {
+    platform: OTAPlatform,
+    version: semver::Version,
+}
+
+/// Download firmware update
+pub async fn retrieve_firmware(path: web::Path<FirmwarePath>) -> HttpResult {
+    if !ota_manager::update_exists(path.platform, &path.version)? {
+        return Ok(HttpResponse::NotFound().json("The requested firmware was not found!"));
+    }
+
+    let firmware = ota_manager::get_ota_update(path.platform, &path.version)?;
+
+    Ok(HttpResponse::Ok().body(firmware))
+}

central_backend/src/server/devices_api/jwt_parser.rs

@@ -0,0 +1,96 @@
+use crate::app_config::AppConfig;
+use crate::crypto::pki;
+use crate::devices::device::{Device, DeviceId};
+use crate::energy::energy_actor;
+use crate::server::WebEnergyActor;
+use jsonwebtoken::{Algorithm, DecodingKey, Validation};
+use openssl::x509::X509;
+use serde::de::DeserializeOwned;
+use std::collections::HashSet;
+
+#[derive(thiserror::Error, Debug)]
+pub enum JWTError {
+    #[error("Failed to decode JWT header")]
+    FailedDecodeJWT,
+    #[error("Missing KID in JWT!")]
+    MissingKidInJWT,
+    #[error("Sent a JWT for a device which does not exists!")]
+    DeviceDoesNotExists,
+    #[error("Sent a JWT for a device which is not validated!")]
+    DeviceNotValidated,
+    #[error("Sent a JWT using a revoked certificate!")]
+    RevokedCertificate,
+    #[error("Failed to validate JWT!")]
+    FailedValidateJWT,
+}
+
+#[derive(serde::Deserialize)]
+pub struct JWTRequest {
+    pub payload: String,
+}
+
+impl JWTRequest {
+    pub async fn parse_jwt<E: DeserializeOwned>(
+        &self,
+        actor: WebEnergyActor,
+    ) -> anyhow::Result<(Device, E)> {
+        // First, we need to extract device kid from query
+        let Ok(jwt_header) = jsonwebtoken::decode_header(&self.payload) else {
+            log::error!("Failed to decode JWT header!");
+            return Err(JWTError::FailedDecodeJWT.into());
+        };
+
+        let Some(kid) = jwt_header.kid else {
+            log::error!("Missing KID in JWT!");
+            return Err(JWTError::MissingKidInJWT.into());
+        };
+
+        // Fetch device information
+        let Some(device) = actor
+            .send(energy_actor::GetSingleDevice(DeviceId(kid)))
+            .await?
+        else {
+            log::error!("Sent a JWT for a device which does not exists!");
+            return Err(JWTError::DeviceDoesNotExists.into());
+        };
+
+        if !device.validated {
+            log::error!("Sent a JWT for a device which is not validated!");
+            return Err(JWTError::DeviceNotValidated.into());
+        }
+
+        // Check certificate revocation status
+        let cert_bytes = std::fs::read(AppConfig::get().device_cert_path(&device.id))?;
+        let certificate = X509::from_pem(&cert_bytes)?;
+
+        if pki::CertData::load_devices_ca()?.is_revoked(&certificate)? {
+            log::error!("Sent a JWT using a revoked certificate!");
+            return Err(JWTError::RevokedCertificate.into());
+        }
+
+        let (key, alg) = match DecodingKey::from_ec_pem(&cert_bytes) {
+            Ok(key) => (key, Algorithm::ES256),
+            Err(e) => {
+                log::warn!("Failed to decode certificate as EC certificate {e}, trying RSA...");
+                (
+                    DecodingKey::from_rsa_pem(&cert_bytes)
+                        .expect("Failed to decode RSA certificate"),
+                    Algorithm::RS256,
+                )
+            }
+        };
+        let mut validation = Validation::new(alg);
+        validation.validate_exp = false;
+        validation.required_spec_claims = HashSet::default();
+
+        let c = match jsonwebtoken::decode::<E>(&self.payload, &key, &validation) {
+            Ok(c) => c,
+            Err(e) => {
+                log::error!("Failed to validate JWT! {e}");
+                return Err(JWTError::FailedValidateJWT.into());
+            }
+        };
+
+        Ok((device, c.claims))
+    }
+}

central_backend/src/server/devices_api/mgmt_controller.rs

@@ -1,14 +1,16 @@
 use crate::app_config::AppConfig;
-use crate::crypto::pki;
 use crate::devices::device::{DeviceId, DeviceInfo};
 use crate::energy::energy_actor;
+use crate::energy::energy_actor::RelaySyncStatus;
+use crate::ota::ota_manager;
+use crate::ota::ota_update::OTAPlatform;
 use crate::server::custom_error::HttpResult;
+use crate::server::devices_api::jwt_parser::JWTRequest;
 use crate::server::WebEnergyActor;
 use actix_web::{web, HttpResponse};
-use jsonwebtoken::{Algorithm, DecodingKey, Validation};
 use openssl::nid::Nid;
-use openssl::x509::{X509Req, X509};
-use std::collections::HashSet;
+use openssl::x509::X509Req;
+use std::str::FromStr;
 
 #[derive(Debug, serde::Deserialize)]
 pub struct EnrollRequest {
@@ -128,80 +130,41 @@ pub async fn get_certificate(query: web::Query<ReqWithDevID>, actor: WebEnergyAc
         .body(cert))
 }
 
-#[derive(serde::Deserialize)]
-pub struct SyncRequest {
-    payload: String,
-}
-
 #[derive(Debug, serde::Serialize, serde::Deserialize)]
 struct Claims {
     info: DeviceInfo,
 }
 
+#[derive(serde::Serialize)]
+struct SyncResult {
+    relays: Vec<RelaySyncStatus>,
+    available_update: Option<semver::Version>,
+}
+
 /// Synchronize device
-pub async fn sync_device(body: web::Json<SyncRequest>, actor: WebEnergyActor) -> HttpResult {
-    // First, we need to extract device kid from query
-    let Ok(jwt_header) = jsonwebtoken::decode_header(&body.payload) else {
-        log::error!("Failed to decode JWT header!");
-        return Ok(HttpResponse::BadRequest().json("Failed to decode JWT header!"));
-    };
+pub async fn sync_device(body: web::Json<JWTRequest>, actor: WebEnergyActor) -> HttpResult {
+    let (device, claims) = body.0.parse_jwt::<Claims>(actor.clone()).await?;
 
-    let Some(kid) = jwt_header.kid else {
-        log::error!("Missing KID in JWT!");
-        return Ok(HttpResponse::BadRequest().json("Missing KID in JWT!"));
-    };
-
-    // Fetch device information
-    let Some(device) = actor
-        .send(energy_actor::GetSingleDevice(DeviceId(kid)))
-        .await?
-    else {
-        log::error!("Sent a JWT for a device which does not exists!");
-        return Ok(HttpResponse::NotFound().json("Sent a JWT for a device which does not exists!"));
-    };
-
-    if !device.validated {
-        log::error!("Sent a JWT for a device which is not validated!");
-        return Ok(HttpResponse::PreconditionFailed()
-            .json("Sent a JWT for a device which is not validated!"));
-    }
-
-    // Check certificate revocation status
-    let cert_bytes = std::fs::read(AppConfig::get().device_cert_path(&device.id))?;
-    let certificate = X509::from_pem(&cert_bytes)?;
-
-    if pki::CertData::load_devices_ca()?.is_revoked(&certificate)? {
-        log::error!("Sent a JWT using a revoked certificate!");
-        return Ok(
-            HttpResponse::PreconditionFailed().json("Sent a JWT using a revoked certificate!")
-        );
-    }
-
-    let (key, alg) = match DecodingKey::from_ec_pem(&cert_bytes) {
-        Ok(key) => (key, Algorithm::ES256),
-        Err(e) => {
-            log::warn!("Failed to decode certificate as EC certificate {e}, trying RSA...");
-            (
-                DecodingKey::from_rsa_pem(&cert_bytes).expect("Failed to decode RSA certificate"),
-                Algorithm::RS256,
-            )
-        }
-    };
-    let mut validation = Validation::new(alg);
-    validation.validate_exp = false;
-    validation.required_spec_claims = HashSet::default();
-
-    let c = match jsonwebtoken::decode::<Claims>(&body.payload, &key, &validation) {
-        Ok(c) => c,
-        Err(e) => {
-            log::error!("Failed to validate JWT! {e}");
-            return Ok(HttpResponse::PreconditionFailed().json("Failed to validate JWT!"));
-        }
-    };
-
-    let res = actor
-        .send(energy_actor::SynchronizeDevice(device.id, c.claims.info))
+    let relays = actor
+        .send(energy_actor::SynchronizeDevice(
+            device.id,
+            claims.info.clone(),
+        ))
         .await??;
 
-    Ok(HttpResponse::Ok().json(res))
+    let mut available_update = None;
+
+    // Check if the version is available
+    if let Some(desired) = device.desired_version {
+        if claims.info.version < desired
+            && ota_manager::update_exists(OTAPlatform::from_str(&claims.info.reference)?, &desired)?
+        {
+            available_update = Some(desired);
+        }
+    }
+
+    Ok(HttpResponse::Ok().json(SyncResult {
+        relays,
+        available_update,
+    }))
 }

central_backend/src/server/devices_api/mod.rs

@@ -1,2 +1,5 @@
+pub mod device_logging_controller;
+pub mod devices_ota;
+pub mod jwt_parser;
 pub mod mgmt_controller;
 pub mod utils_controller;

central_backend/src/server/servers.rs

@@ -3,7 +3,9 @@ use crate::constants;
 use crate::crypto::pki;
 use crate::energy::energy_actor::EnergyActorAddr;
 use crate::server::auth_middleware::AuthChecker;
-use crate::server::devices_api::{mgmt_controller, utils_controller};
+use crate::server::devices_api::{
+    device_logging_controller, devices_ota, mgmt_controller, utils_controller,
+};
 use crate::server::unsecure_server::*;
 use crate::server::web_api::*;
 use crate::server::web_app_controller;
@@ -20,14 +22,15 @@ use openssl::ssl::{SslAcceptor, SslMethod};
 use std::time::Duration;
 
 /// Start unsecure (HTTP) server
-pub async fn unsecure_server() -> anyhow::Result<()> {
+pub async fn unsecure_server(energy_actor: EnergyActorAddr) -> anyhow::Result<()> {
     log::info!(
         "Unsecure server starting to listen on {} for {}",
         AppConfig::get().unsecure_listen_address,
         AppConfig::get().unsecure_origin()
     );
-    HttpServer::new(|| {
+    HttpServer::new(move || {
         App::new()
+            .app_data(web::Data::new(energy_actor.clone()))
             .wrap(Logger::default())
             .route(
                 "/",
@@ -41,6 +44,10 @@ pub async fn unsecure_server() -> anyhow::Result<()> {
                 "/pki/{file}",
                 web::get().to(unsecure_pki_controller::serve_pki_file),
             )
+            .route(
+                "/relay/{id}/legacy_state",
+                web::get().to(unsecure_relay_controller::legacy_state),
+            )
     })
     .bind(&AppConfig::get().unsecure_listen_address)?
     .run()
@@ -131,10 +138,22 @@ pub async fn secure_server(energy_actor: EnergyActorAddr) -> anyhow::Result<()>
                 "/web_api/energy/curr_consumption",
                 web::get().to(energy_controller::curr_consumption),
             )
+            .route(
+                "/web_api/energy/curr_consumption/history",
+                web::get().to(energy_controller::curr_consumption_history),
+            )
             .route(
                 "/web_api/energy/cached_consumption",
                 web::get().to(energy_controller::cached_consumption),
             )
+            .route(
+                "/web_api/energy/relays_consumption",
+                web::get().to(energy_controller::relays_consumption),
+            )
+            .route(
+                "/web_api/energy/relays_consumption/history",
+                web::get().to(energy_controller::relays_consumption_history),
+            )
             // Devices controller
             .route(
                 "/web_api/devices/list_pending",
@@ -168,6 +187,37 @@ pub async fn secure_server(energy_actor: EnergyActorAddr) -> anyhow::Result<()>
                 "/web_api/device/{id}",
                 web::delete().to(devices_controller::delete_device),
             )
+            // OTA API
+            .route(
+                "/web_api/ota/supported_platforms",
+                web::get().to(ota_controller::supported_platforms),
+            )
+            .route(
+                "/web_api/ota/{platform}/{version}",
+                web::post().to(ota_controller::upload_firmware),
+            )
+            .route(
+                "/web_api/ota/{platform}/{version}",
+                web::get().to(ota_controller::download_firmware),
+            )
+            .route(
+                "/web_api/ota/{platform}/{version}",
+                web::delete().to(ota_controller::delete_update),
+            )
+            .route("/web_api/ota", web::get().to(ota_controller::list_all_ota))
+            .route(
+                "/web_api/ota/{platform}",
+                web::get().to(ota_controller::list_updates_platform),
+            )
+            .route(
+                "/web_api/ota/set_desired_version",
+                web::post().to(ota_controller::set_desired_version),
+            )
+            // Logging controller API
+            .route(
+                "/web_api/logging/logs",
+                web::get().to(logging_controller::get_log),
+            )
             // Relays API
             .route(
                 "/web_api/relays/list",
@@ -214,6 +264,14 @@ pub async fn secure_server(energy_actor: EnergyActorAddr) -> anyhow::Result<()>
                 "/devices_api/mgmt/sync",
                 web::post().to(mgmt_controller::sync_device),
             )
+            .route(
+                "/devices_api/ota/{platform}/{version}",
+                web::get().to(devices_ota::retrieve_firmware),
+            )
+            .route(
+                "/devices_api/logging/record",
+                web::post().to(device_logging_controller::report_log),
+            )
             // Web app
             .route("/", web::get().to(web_app_controller::root_index))
             .route(

central_backend/src/server/unsecure_server/mod.rs

@@ -1,2 +1,3 @@
 pub mod unsecure_pki_controller;
+pub mod unsecure_relay_controller;
 pub mod unsecure_server_controller;

central_backend/src/server/unsecure_server/unsecure_relay_controller.rs

@@ -0,0 +1,60 @@
+use crate::devices::device::DeviceRelayID;
+use crate::energy::{energy_actor, relay_state_history};
+use crate::server::custom_error::HttpResult;
+use crate::server::WebEnergyActor;
+use actix_web::{web, HttpResponse};
+
+#[derive(serde::Deserialize)]
+pub struct LegacyStateRelay {
+    id: DeviceRelayID,
+}
+
+/// Legacy relay state
+#[derive(serde::Serialize)]
+pub struct LegacyState {
+    /// Indicates if relay is on or off
+    is_on: bool,
+    /// Relay name
+    name: String,
+    /// Duration since last change of state
+    r#for: usize,
+    /// Current grid consumption
+    prod: i32,
+    /// Total uptime since last reset
+    total_uptime: usize,
+    /// Required uptime during a day
+    ///
+    /// Will be 0 if there is no daily requirements
+    required_uptime: usize,
+}
+
+/// Get the state of a relay, adapted for old system components
+pub async fn legacy_state(
+    energy_actor: WebEnergyActor,
+    path: web::Path<LegacyStateRelay>,
+) -> HttpResult {
+    let Some(relay) = energy_actor
+        .send(energy_actor::GetSingleRelay(path.id))
+        .await?
+    else {
+        return Ok(HttpResponse::NotFound().body("Relay not found!"));
+    };
+
+    let all_states = energy_actor.send(energy_actor::GetAllRelaysState).await?;
+    let Some(state) = all_states.into_iter().find(|r| r.id == path.id) else {
+        return Ok(HttpResponse::InternalServerError().body("Relay status unavailable!"));
+    };
+
+    let production = energy_actor.send(energy_actor::GetCurrConsumption).await?;
+
+    let total_uptime = relay_state_history::relay_total_runtime_adjusted(&relay);
+
+    Ok(HttpResponse::Ok().json(LegacyState {
+        name: relay.name,
+        is_on: state.on,
+        r#for: state.r#for.min(3600 * 24 * 7),
+        prod: production,
+        total_uptime,
+        required_uptime: relay.daily_runtime.map(|r| r.min_runtime).unwrap_or(0),
+    }))
+}

central_backend/src/server/web_api/energy_controller.rs

@@ -1,6 +1,10 @@
+use crate::app_config::ConsumptionHistoryType;
+use crate::energy::consumption::EnergyConsumption;
+use crate::energy::consumption_history_file::ConsumptionHistoryFile;
 use crate::energy::{consumption, energy_actor};
 use crate::server::custom_error::HttpResult;
 use crate::server::WebEnergyActor;
+use crate::utils::time_utils::time_secs;
 use actix_web::HttpResponse;
 
 #[derive(serde::Serialize)]
@@ -15,9 +19,38 @@ pub async fn curr_consumption() -> HttpResult {
     Ok(HttpResponse::Ok().json(Consumption { consumption }))
 }
 
+/// Get curr consumption history
+pub async fn curr_consumption_history() -> HttpResult {
+    let history = ConsumptionHistoryFile::get_history(
+        ConsumptionHistoryType::GridConsumption,
+        time_secs() - 3600 * 24,
+        time_secs(),
+        60 * 10,
+    )?;
+    Ok(HttpResponse::Ok().json(history))
+}
+
 /// Get cached energy consumption
 pub async fn cached_consumption(energy_actor: WebEnergyActor) -> HttpResult {
     let consumption = energy_actor.send(energy_actor::GetCurrConsumption).await?;
 
     Ok(HttpResponse::Ok().json(Consumption { consumption }))
 }
+
+/// Get current relays consumption
+pub async fn relays_consumption(energy_actor: WebEnergyActor) -> HttpResult {
+    let consumption =
+        energy_actor.send(energy_actor::RelaysConsumption).await? as EnergyConsumption;
+
+    Ok(HttpResponse::Ok().json(Consumption { consumption }))
+}
+
+pub async fn relays_consumption_history() -> HttpResult {
+    let history = ConsumptionHistoryFile::get_history(
+        ConsumptionHistoryType::RelayConsumption,
+        time_secs() - 3600 * 24,
+        time_secs(),
+        60 * 10,
+    )?;
+    Ok(HttpResponse::Ok().json(history))
+}

central_backend/src/server/web_api/logging_controller.rs

@@ -0,0 +1,30 @@
+use crate::devices::device::DeviceId;
+use crate::logs::logs_manager;
+use crate::logs::severity::LogSeverity;
+use crate::server::custom_error::HttpResult;
+use crate::utils::time_utils::curr_day_number;
+use actix_web::{web, HttpResponse};
+
+#[derive(serde::Deserialize)]
+pub struct LogRequest {
+    // Day number
+    day: Option<u64>,
+    min_severity: Option<LogSeverity>,
+    device: Option<DeviceId>,
+}
+
+/// Get some logs
+pub async fn get_log(req: web::Query<LogRequest>) -> HttpResult {
+    let day = req.day.unwrap_or_else(curr_day_number);
+    let mut logs = logs_manager::get_logs(day)?;
+
+    if let Some(min_severity) = req.min_severity {
+        logs.retain(|d| d.severity >= min_severity);
+    }
+
+    if let Some(dev_id) = &req.device {
+        logs.retain(|d| d.device_id.as_ref() == Some(dev_id));
+    }
+
+    Ok(HttpResponse::Ok().json(logs))
+}

central_backend/src/server/web_api/mod.rs

@@ -1,5 +1,7 @@
 pub mod auth_controller;
 pub mod devices_controller;
 pub mod energy_controller;
+pub mod logging_controller;
+pub mod ota_controller;
 pub mod relays_controller;
 pub mod server_controller;

central_backend/src/server/web_api/ota_controller.rs

@@ -0,0 +1,148 @@
+use crate::constants;
+use crate::devices::device::DeviceId;
+use crate::energy::energy_actor;
+use crate::ota::ota_manager;
+use crate::ota::ota_update::OTAPlatform;
+use crate::server::custom_error::HttpResult;
+use crate::server::WebEnergyActor;
+use actix_multipart::form::tempfile::TempFile;
+use actix_multipart::form::MultipartForm;
+use actix_web::{web, HttpResponse};
+
+pub async fn supported_platforms() -> HttpResult {
+    Ok(HttpResponse::Ok().json(OTAPlatform::supported_platforms()))
+}
+
+#[derive(Debug, MultipartForm)]
+pub struct UploadForm {
+    #[multipart(rename = "firmware")]
+    firmware: Vec<TempFile>,
+}
+
+#[derive(serde::Deserialize)]
+pub struct SpecificOTAVersionPath {
+    platform: OTAPlatform,
+    version: semver::Version,
+}
+
+/// Upload a new firmware update
+pub async fn upload_firmware(
+    MultipartForm(form): MultipartForm<UploadForm>,
+    path: web::Path<SpecificOTAVersionPath>,
+) -> HttpResult {
+    if ota_manager::update_exists(path.platform, &path.version)? {
+        return Ok(HttpResponse::Conflict()
+            .json("A firmware with the same version has already been uploaded on the platform!"));
+    }
+
+    let Some(file) = form.firmware.first() else {
+        return Ok(HttpResponse::BadRequest().json("No firmware specified!"));
+    };
+
+    if file.size == 0 {
+        return Ok(HttpResponse::BadRequest().json("Uploaded file is empty!"));
+    }
+
+    if file.size > constants::MAX_FIRMWARE_SIZE {
+        return Ok(HttpResponse::BadRequest().json("Uploaded file is too heavy!"));
+    }
+
+    let content = std::fs::read(file.file.path())?;
+
+    ota_manager::save_update(path.platform, &path.version, &content)?;
+
+    Ok(HttpResponse::Accepted().body("OTA update successfully saved."))
+}
+
+/// Download a firmware update
+pub async fn download_firmware(path: web::Path<SpecificOTAVersionPath>) -> HttpResult {
+    if !ota_manager::update_exists(path.platform, &path.version)? {
+        return Ok(HttpResponse::NotFound().json("The requested firmware update was not found!"));
+    }
+
+    let firmware = ota_manager::get_ota_update(path.platform, &path.version)?;
+
+    Ok(HttpResponse::Ok()
+        .content_type("application/octet-stream")
+        .append_header((
+            "content-disposition",
+            format!(
+                "attachment; filename=\"{}-{}.bin\"",
+                path.platform, path.version
+            ),
+        ))
+        .body(firmware))
+}
+
+/// Delete an uploaded firmware update
+pub async fn delete_update(path: web::Path<SpecificOTAVersionPath>) -> HttpResult {
+    if !ota_manager::update_exists(path.platform, &path.version)? {
+        return Ok(HttpResponse::NotFound().json("The requested firmware update was not found!"));
+    }
+
+    ota_manager::delete_update(path.platform, &path.version)?;
+
+    Ok(HttpResponse::Accepted().finish())
+}
+
+/// Get the list of all OTA updates
+pub async fn list_all_ota() -> HttpResult {
+    Ok(HttpResponse::Ok().json(ota_manager::get_all_ota_updates()?))
+}
+
+#[derive(serde::Deserialize)]
+pub struct ListOTAPath {
+    platform: OTAPlatform,
+}
+
+/// List OTA software updates for a given platform
+pub async fn list_updates_platform(path: web::Path<ListOTAPath>) -> HttpResult {
+    let list = ota_manager::get_ota_updates_for_platform(path.platform)?;
+
+    Ok(HttpResponse::Ok().json(list))
+}
+
+#[derive(serde::Deserialize)]
+pub struct SetDesiredDeviceVersion {
+    devices: Option<Vec<DeviceId>>,
+    platform: Option<OTAPlatform>,
+    version: semver::Version,
+}
+
+pub async fn set_desired_version(
+    actor: WebEnergyActor,
+    body: web::Json<SetDesiredDeviceVersion>,
+) -> HttpResult {
+    if body.devices.is_none() && body.platform.is_none() {
+        return Ok(
+            HttpResponse::BadRequest().json("Must specify one filter to select target devices!")
+        );
+    }
+
+    let devices = actor.send(energy_actor::GetDeviceLists).await?;
+
+    for d in devices {
+        // Filter per platform
+        if let Some(p) = body.platform {
+            if d.info.reference != p.to_string() {
+                continue;
+            }
+        }
+
+        // Filter per device
+        if let Some(ids) = &body.devices {
+            if !ids.contains(&d.id) {
+                continue;
+            }
+        }
+
+        actor
+            .send(energy_actor::SetDesiredVersion(
+                d.id,
+                Some(body.version.clone()),
+            ))
+            .await??;
+    }
+
+    Ok(HttpResponse::Ok().finish())
+}

central_backend/src/server/web_api/server_controller.rs

@@ -12,6 +12,7 @@ pub async fn secure_home() -> HttpResponse {
 struct ServerConfig {
     auth_disabled: bool,
     constraints: StaticConstraints,
+    unsecure_origin: String,
 }
 
 impl Default for ServerConfig {
@@ -19,6 +20,7 @@ impl Default for ServerConfig {
         Self {
             auth_disabled: AppConfig::get().unsecure_disable_login,
             constraints: Default::default(),
+            unsecure_origin: AppConfig::get().unsecure_origin(),
         }
     }
 }

central_backend/src/utils/math_utils.rs

@@ -0,0 +1,8 @@
+use std::ops::Div;
+
+pub fn median<E: Div + Copy + Ord>(numbers: &[E]) -> E {
+    let mut numbers = numbers.to_vec();
+    numbers.sort();
+    let mid = numbers.len() / 2;
+    numbers[mid]
+}

central_backend/src/utils/mod.rs

@@ -1,2 +1,3 @@
 pub mod files_utils;
+pub mod math_utils;
 pub mod time_utils;

central_backend/src/utils/time_utils.rs

@@ -22,6 +22,11 @@ pub fn day_number(time: u64) -> u64 {
     time / (3600 * 24)
 }
 
+/// Get current day number
+pub fn curr_day_number() -> u64 {
+    day_number(time_secs())
+}
+
 /// Get current hour, 00 => 23 (local time)
 pub fn curr_hour() -> u32 {
     let local: DateTime<Local> = Local::now();

central_frontend/README.md

@@ -1,30 +0,0 @@
-# React + TypeScript + Vite
-
-This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
-
-Currently, two official plugins are available:
-
-- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react/README.md) uses [Babel](https://babeljs.io/) for Fast Refresh
-- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
-
-## Expanding the ESLint configuration
-
-If you are developing a production application, we recommend updating the configuration to enable type aware lint rules:
-
-- Configure the top-level `parserOptions` property like this:
-
-```js
-export default {
-  // other rules...
-  parserOptions: {
-    ecmaVersion: 'latest',
-    sourceType: 'module',
-    project: ['./tsconfig.json', './tsconfig.node.json'],
-    tsconfigRootDir: __dirname,
-  },
-}
-```
-
-- Replace `plugin:@typescript-eslint/recommended` to `plugin:@typescript-eslint/recommended-type-checked` or `plugin:@typescript-eslint/strict-type-checked`
-- Optionally add `plugin:@typescript-eslint/stylistic-type-checked`
-- Install [eslint-plugin-react](https://github.com/jsx-eslint/eslint-plugin-react) and add `plugin:react/recommended` & `plugin:react/jsx-runtime` to the `extends` list

central_frontend/index.html

@@ -2,7 +2,7 @@
 <html lang="en">
   <head>
     <meta charset="UTF-8" />
-    <link rel="icon" type="image/svg+xml" href="/sunny.svg" />
+    <link rel="icon" type="image/svg+xml" href="/assets/sunny.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>SolarEnergy</title>
   </head>

central_frontend/package.json

@@ -15,26 +15,29 @@
     "@fontsource/roboto": "^5.1.0",
     "@mdi/js": "^7.4.47",
     "@mdi/react": "^1.6.1",
-    "@mui/icons-material": "^6.1.1",
-    "@mui/material": "^6.1.1",
-    "@mui/x-charts": "^7.18.0",
-    "@mui/x-date-pickers": "^7.18.0",
-    "date-and-time": "^3.5.0",
+    "@mui/icons-material": "^6.1.3",
+    "@mui/material": "^6.1.3",
+    "@mui/x-charts": "^7.20.0",
+    "@mui/x-date-pickers": "^7.20.0",
+    "@types/semver": "^7.5.8",
+    "date-and-time": "^3.6.0",
     "dayjs": "^1.11.13",
+    "filesize": "^10.1.6",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
-    "react-router-dom": "^6.26.2"
+    "react-router-dom": "^6.27.0",
+    "semver": "^7.6.3"
   },
   "devDependencies": {
-    "@types/react": "^18.3.8",
-    "@types/react-dom": "^18.3.0",
-    "@typescript-eslint/eslint-plugin": "^8.6.0",
-    "@typescript-eslint/parser": "^8.6.0",
-    "@vitejs/plugin-react": "^4.3.1",
+    "@types/react": "^18.3.11",
+    "@types/react-dom": "^18.3.1",
+    "@typescript-eslint/eslint-plugin": "^8.8.0",
+    "@typescript-eslint/parser": "^8.8.0",
+    "@vitejs/plugin-react": "^4.3.2",
     "eslint": "^8.57.1",
-    "eslint-plugin-react-hooks": "^4.6.2",
+    "eslint-plugin-react-hooks": "^5.0.0",
     "eslint-plugin-react-refresh": "^0.4.12",
-    "typescript": "^5.6.2",
-    "vite": "^5.4.7"
+    "typescript": "^5.6.3",
+    "vite": "^5.4.8"
   }
 }

central_frontend/src/App.tsx

@@ -10,10 +10,12 @@ import { DeviceRoute } from "./routes/DeviceRoute/DeviceRoute";
 import { DevicesRoute } from "./routes/DevicesRoute";
 import { HomeRoute } from "./routes/HomeRoute";
 import { LoginRoute } from "./routes/LoginRoute";
+import { LogsRoute } from "./routes/LogsRoute";
 import { NotFoundRoute } from "./routes/NotFoundRoute";
 import { PendingDevicesRoute } from "./routes/PendingDevicesRoute";
 import { RelaysListRoute } from "./routes/RelaysListRoute";
 import { BaseAuthenticatedPage } from "./widgets/BaseAuthenticatedPage";
+import { OTARoute } from "./routes/OTARoute";
 
 export function App() {
   if (!AuthApi.SignedIn && !ServerApi.Config.auth_disabled)
@@ -27,6 +29,8 @@ export function App() {
         <Route path="devices" element={<DevicesRoute />} />
         <Route path="dev/:id" element={<DeviceRoute />} />
         <Route path="relays" element={<RelaysListRoute />} />
+        <Route path="ota" element={<OTARoute />} />
+        <Route path="logs" element={<LogsRoute />} />
         <Route path="*" element={<NotFoundRoute />} />
       </Route>
     )

central_frontend/src/api/DeviceApi.ts

@@ -37,6 +37,7 @@ export interface Device {
   validated: boolean;
   enabled: boolean;
   relays: DeviceRelay[];
+  desired_version?: string;
 }
 
 export interface UpdatedInfo {

central_frontend/src/api/EnergyApi.ts

@@ -2,9 +2,9 @@ import { APIClient } from "./ApiClient";
 
 export class EnergyApi {
   /**
-   * Get current house consumption
+   * Get current grid consumption
    */
-  static async CurrConsumption(): Promise<number> {
+  static async GridConsumption(): Promise<number> {
     const data = await APIClient.exec({
       method: "GET",
       uri: "/energy/curr_consumption",
@@ -12,6 +12,18 @@ export class EnergyApi {
     return data.data.consumption;
   }
 
+  /**
+   * Get grid consumption history
+   */
+  static async GridConsumptionHistory(): Promise<number[]> {
+    return (
+      await APIClient.exec({
+        method: "GET",
+        uri: "/energy/curr_consumption/history",
+      })
+    ).data;
+  }
+
   /**
    * Get current cached consumption
    */
@@ -22,4 +34,28 @@ export class EnergyApi {
     });
     return data.data.consumption;
   }
+
+  /**
+   * Get relays consumption
+   */
+  static async RelaysConsumption(): Promise<number> {
+    return (
+      await APIClient.exec({
+        method: "GET",
+        uri: "/energy/relays_consumption",
+      })
+    ).data.consumption;
+  }
+
+  /**
+   * Get relays consumption history
+   */
+  static async RelaysConsumptionHistory(): Promise<number[]> {
+    return (
+      await APIClient.exec({
+        method: "GET",
+        uri: "/energy/relays_consumption/history",
+      })
+    ).data;
+  }
 }

central_frontend/src/api/LogsAPI.ts

@@ -0,0 +1,29 @@
+import { Dayjs } from "dayjs";
+import { APIClient } from "./ApiClient";
+
+export type LogSeverity = "Debug" | "Info" | "Warn" | "Error";
+
+export interface LogEntry {
+  device_id: string;
+  time: number;
+  severity: LogSeverity;
+  message: string;
+}
+
+export class LogsAPI {
+  /**
+   * Request the logs from the server
+   *
+   * @param date The date that contains the requested date
+   */
+  static async GetLogs(date: Dayjs): Promise<LogEntry[]> {
+    const day = Math.floor(date.unix() / (3600 * 24));
+
+    const res = await APIClient.exec({
+      uri: `/logging/logs?day=${day}`,
+      method: "GET",
+    });
+
+    return res.data;
+  }
+}

central_frontend/src/api/OTAApi.ts

@@ -0,0 +1,87 @@
+import { APIClient } from "./ApiClient";
+
+export interface OTAUpdate {
+  platform: string;
+  version: string;
+  file_size: number;
+}
+
+export class OTAAPI {
+  /**
+   * Get the list of supported OTA platforms
+   */
+  static async SupportedPlatforms(): Promise<Array<string>> {
+    return (
+      await APIClient.exec({
+        method: "GET",
+        uri: "/ota/supported_platforms",
+      })
+    ).data;
+  }
+
+  /**
+   * Upload new OTA firwmare
+   */
+  static async UploadFirmware(
+    platform: string,
+    version: string,
+    firmware: File
+  ): Promise<void> {
+    const fd = new FormData();
+    fd.append("firmware", firmware);
+
+    await APIClient.exec({
+      method: "POST",
+      uri: `/ota/${platform}/${version}`,
+      formData: fd,
+    });
+  }
+
+  /**
+   * Get the link to download an OTA update
+   */
+  static DownloadOTAUpdateURL(update: OTAUpdate): string {
+    return APIClient.backendURL() + `/ota/${update.platform}/${update.version}`;
+  }
+
+  /**
+   * Delete an update
+   */
+  static async DeleteUpdate(update: OTAUpdate): Promise<void> {
+    await APIClient.exec({
+      method: "DELETE",
+      uri: `/ota/${update.platform}/${update.version}`,
+    });
+  }
+
+  /**
+   * Get the list of OTA updates
+   */
+  static async ListOTAUpdates(): Promise<OTAUpdate[]> {
+    return (
+      await APIClient.exec({
+        method: "GET",
+        uri: "/ota",
+      })
+    ).data;
+  }
+
+  /**
+   * Set desired version for one or mor devices
+   */
+  static async SetDesiredVersion(
+    update: OTAUpdate,
+    all_devices: boolean,
+    devices?: string[]
+  ): Promise<void> {
+    await APIClient.exec({
+      method: "POST",
+      uri: "/ota/set_desired_version",
+      jsonData: {
+        version: update.version,
+        platform: update.platform,
+        devices: all_devices ? undefined : devices!,
+      },
+    });
+  }
+}

central_frontend/src/api/RelayApi.ts

@@ -83,7 +83,7 @@ export class RelayApi {
     return (
       await APIClient.exec({
         method: "GET",
-        uri: `/relay/${relay.id}/state`,
+        uri: `/relay/${relay.id}/status`,
       })
     ).data;
   }

central_frontend/src/api/ServerApi.ts

@@ -3,6 +3,7 @@ import { APIClient } from "./ApiClient";
 export interface ServerConfig {
   auth_disabled: boolean;
   constraints: ServerConstraint;
+  unsecure_origin: string;
 }
 
 export interface ServerConstraint {

central_frontend/src/dialogs/DeployOTAUpdateDialogProvider.tsx

@@ -0,0 +1,148 @@
+import {
+  Button,
+  Checkbox,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogContentText,
+  DialogTitle,
+  FormControl,
+  FormControlLabel,
+  FormGroup,
+  FormLabel,
+  Radio,
+  RadioGroup,
+  Typography,
+} from "@mui/material";
+import React from "react";
+import { Device, DeviceApi } from "../api/DeviceApi";
+import { OTAAPI, OTAUpdate } from "../api/OTAApi";
+import { useAlert } from "../hooks/context_providers/AlertDialogProvider";
+import { useConfirm } from "../hooks/context_providers/ConfirmDialogProvider";
+import { useLoadingMessage } from "../hooks/context_providers/LoadingMessageProvider";
+import { useSnackbar } from "../hooks/context_providers/SnackbarProvider";
+import { AsyncWidget } from "../widgets/AsyncWidget";
+
+export function DeployOTAUpdateDialogProvider(p: {
+  update: OTAUpdate;
+  onClose: () => void;
+}): React.ReactElement {
+  const loadingMessage = useLoadingMessage();
+  const alert = useAlert();
+  const confirm = useConfirm();
+  const snackbar = useSnackbar();
+
+  const [devicesList, setDevicesList] = React.useState<Device[] | undefined>();
+
+  const loadDevicesList = async () => {
+    let list = await DeviceApi.ValidatedList();
+    list = list.filter((e) => e.info.reference == p.update.platform);
+    setDevicesList(list);
+  };
+
+  const [allDevices, setAllDevices] = React.useState(false);
+  const [selectedDevices, setSelectedDevices] = React.useState<string[]>([]);
+
+  const startDeployment = async () => {
+    if (
+      allDevices &&
+      !(await confirm(
+        "Do you really want to deploy the update to all devices?"
+      ))
+    )
+      return;
+    try {
+      loadingMessage.show("Applying OTA update...");
+
+      await OTAAPI.SetDesiredVersion(p.update, allDevices, selectedDevices);
+
+      snackbar("The update was successfully applied!");
+      p.onClose();
+    } catch (e) {
+      console.error("Failed to deploy the udpate!", e);
+      alert(`Failed to deploy the udpate! ${e}`);
+    } finally {
+      loadingMessage.hide();
+    }
+  };
+
+  return (
+    <Dialog open={true} onClose={p.onClose}>
+      <DialogTitle>
+        Deploy update <i>{p.update.version}</i> for platform{" "}
+        <i>{p.update.platform}</i>
+      </DialogTitle>
+      <AsyncWidget
+        loadKey={1}
+        load={loadDevicesList}
+        errMsg="Failed to load the list of devices!"
+        build={() => (
+          <DialogContent>
+            <DialogContentText>
+              You can choose to deploy update to all device or to target only a
+              part of devices:
+            </DialogContentText>
+
+            <FormControl>
+              <FormLabel>Gender</FormLabel>
+              <RadioGroup
+                name="radio-buttons-group"
+                value={allDevices}
+                onChange={(v) => setAllDevices(v.target.value == "true")}
+              >
+                <FormControlLabel
+                  value={true}
+                  control={<Radio />}
+                  label="Deploy the update to all the devices of the platform"
+                />
+                <FormControlLabel
+                  value={false}
+                  control={<Radio />}
+                  label="Deploy the update to a limited range of devices"
+                />
+              </RadioGroup>
+            </FormControl>
+            {!allDevices && (
+              <Typography>
+                There are no devices to which the update can be deployed.
+              </Typography>
+            )}
+            {!allDevices && (
+              <FormGroup>
+                {devicesList?.map((d) => (
+                  <FormControlLabel
+                    control={
+                      <Checkbox
+                        checked={selectedDevices.includes(d.id)}
+                        onChange={(_e, v) => {
+                          if (v) {
+                            selectedDevices.push(d.id);
+                            setSelectedDevices([...selectedDevices]);
+                          } else
+                            setSelectedDevices(
+                              selectedDevices.filter((e) => e != d.id)
+                            );
+                        }}
+                      />
+                    }
+                    label={d.name}
+                  />
+                ))}
+              </FormGroup>
+            )}
+          </DialogContent>
+        )}
+      />
+      <DialogActions>
+        <Button onClick={p.onClose}>Cancel</Button>
+        <Button
+          onClick={startDeployment}
+          autoFocus
+          disabled={!allDevices && selectedDevices.length == 0}
+        >
+          Start deployment
+        </Button>
+      </DialogActions>
+    </Dialog>
+  );
+}

central_frontend/src/dialogs/UploadUpdateDialog.tsx

@@ -0,0 +1,132 @@
+import CloudUploadIcon from "@mui/icons-material/CloudUpload";
+import {
+  Button,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogContentText,
+  DialogTitle,
+  FormControl,
+  InputLabel,
+  MenuItem,
+  Select,
+  styled,
+} from "@mui/material";
+import React from "react";
+import { OTAAPI } from "../api/OTAApi";
+import { useAlert } from "../hooks/context_providers/AlertDialogProvider";
+import { useLoadingMessage } from "../hooks/context_providers/LoadingMessageProvider";
+import { useSnackbar } from "../hooks/context_providers/SnackbarProvider";
+import { checkVersion } from "../utils/StringsUtils";
+import { TextInput } from "../widgets/forms/TextInput";
+
+const VisuallyHiddenInput = styled("input")({
+  clip: "rect(0 0 0 0)",
+  clipPath: "inset(50%)",
+  height: 1,
+  overflow: "hidden",
+  position: "absolute",
+  bottom: 0,
+  left: 0,
+  whiteSpace: "nowrap",
+  width: 1,
+});
+
+export function UploadUpdateDialog(p: {
+  platforms: string[];
+  onClose: () => void;
+  onCreated: () => void;
+}): React.ReactElement {
+  const alert = useAlert();
+  const snackbar = useSnackbar();
+  const loadingMessage = useLoadingMessage();
+
+  const [platform, setPlatform] = React.useState<string | undefined>();
+  const [version, setVersion] = React.useState<string | undefined>();
+  const [file, setFile] = React.useState<File | undefined>();
+
+  const canSubmit = platform && version && checkVersion(version) && file;
+
+  const upload = async () => {
+    try {
+      loadingMessage.show("Uploading firmware...");
+      await OTAAPI.UploadFirmware(platform!, version!, file!);
+
+      snackbar("Successfully uploaded new firmware!");
+
+      p.onCreated();
+    } catch (e) {
+      console.error(e);
+      alert(`Failed to upload firmware: ${e}`);
+    } finally {
+      loadingMessage.hide();
+    }
+  };
+
+  return (
+    <Dialog open={true} onClose={p.onClose}>
+      <DialogTitle>Submit a new update</DialogTitle>
+      <DialogContent>
+        <DialogContentText>
+          You can upload a new firmware using this form.
+        </DialogContentText>
+        <br />
+        <FormControl fullWidth>
+          <InputLabel>Platform</InputLabel>
+          <Select
+            label="Platform"
+            value={platform}
+            onChange={(e) => setPlatform(e.target.value)}
+            variant="standard"
+          >
+            {p.platforms.map((p) => (
+              <MenuItem key={p} value={p}>
+                {p}
+              </MenuItem>
+            ))}
+          </Select>
+        </FormControl>
+        <br />
+        <br />
+        <TextInput
+          editable
+          label="Version"
+          helperText="The version shall follow semantics requirements"
+          value={version}
+          onValueChange={setVersion}
+          checkValue={checkVersion}
+        />
+
+        <br />
+
+        <Button
+          fullWidth
+          component="label"
+          role={undefined}
+          variant={file ? "contained" : "outlined"}
+          tabIndex={-1}
+          startIcon={<CloudUploadIcon />}
+        >
+          Upload file
+          <VisuallyHiddenInput
+            type="file"
+            onChange={(event) =>
+              setFile(
+                (event.target.files?.length ?? 0) > 0
+                  ? event.target.files![0]
+                  : undefined
+              )
+            }
+            multiple
+          />
+        </Button>
+      </DialogContent>
+      <DialogActions>
+        <Button onClick={p.onClose}>Cancel</Button>
+        <Button type="submit" disabled={!canSubmit} onClick={upload}>
+          Upload
+        </Button>
+      </DialogActions>
+    </Dialog>
+  );
+}

central_frontend/src/routes/DeviceRoute/DeviceInfoProperty.tsx

@@ -3,7 +3,7 @@ import { TableCell, TableRow } from "@mui/material";
 export function DeviceInfoProperty(p: {
   icon?: React.ReactElement;
   label: string;
-  value: string;
+  value: string | React.ReactElement;
   color?: string;
 }): React.ReactElement {
   return (

central_frontend/src/routes/DeviceRoute/DeviceRelays.tsx

@@ -129,7 +129,9 @@ export function DeviceRelays(p: {
   );
 }
 
-function RelayEntryStatus(p: { relay: DeviceRelay }): React.ReactElement {
+function RelayEntryStatus(
+  p: Readonly<{ relay: DeviceRelay }>
+): React.ReactElement {
   const [state, setState] = React.useState<RelayStatus | undefined>();
 
   const load = async () => {

central_frontend/src/routes/DeviceRoute/DeviceStateBlock.tsx

@@ -1,10 +1,11 @@
+import { Table, TableBody } from "@mui/material";
 import React from "react";
 import { Device, DeviceApi, DeviceState } from "../../api/DeviceApi";
 import { AsyncWidget } from "../../widgets/AsyncWidget";
-import { DeviceRouteCard } from "./DeviceRouteCard";
-import { Table, TableBody } from "@mui/material";
-import { DeviceInfoProperty } from "./DeviceInfoProperty";
+import { BoolText } from "../../widgets/BoolText";
 import { timeDiff } from "../../widgets/TimeWidget";
+import { DeviceInfoProperty } from "./DeviceInfoProperty";
+import { DeviceRouteCard } from "./DeviceRouteCard";
 
 export function DeviceStateBlock(p: { device: Device }): React.ReactElement {
   const [state, setState] = React.useState<DeviceState>();
@@ -32,7 +33,13 @@ function DeviceStateInner(p: { state: DeviceState }): React.ReactElement {
       <TableBody>
         <DeviceInfoProperty
           label="Status"
-          value={p.state.online ? "Online" : "Offline"}
+          value={
+            <BoolText
+              val={p.state.online}
+              positive="ONLINE"
+              negative="Offline"
+            />
+          }
         />
         <DeviceInfoProperty
           label="Last ping"

central_frontend/src/routes/DeviceRoute/GeneralDeviceInfo.tsx

@@ -3,6 +3,7 @@ import { IconButton, Table, TableBody, Tooltip } from "@mui/material";
 import React from "react";
 import { Device } from "../../api/DeviceApi";
 import { EditDeviceMetadataDialog } from "../../dialogs/EditDeviceMetadataDialog";
+import { BoolText } from "../../widgets/BoolText";
 import { formatDate } from "../../widgets/TimeWidget";
 import { DeviceInfoProperty } from "./DeviceInfoProperty";
 import { DeviceRouteCard } from "./DeviceRouteCard";
@@ -40,6 +41,10 @@ export function GeneralDeviceInfo(p: {
               value={p.device.info.reference}
             />
             <DeviceInfoProperty label="Version" value={p.device.info.version} />
+            <DeviceInfoProperty
+              label="Desired version"
+              value={p.device.desired_version ?? "None"}
+            />
             <DeviceInfoProperty label="Name" value={p.device.name} />
             <DeviceInfoProperty
               label="Description"
@@ -55,8 +60,9 @@ export function GeneralDeviceInfo(p: {
             />
             <DeviceInfoProperty
               label="Enabled"
-              value={p.device.enabled ? "YES" : "NO"}
-              color={p.device.enabled ? "green" : "red"}
+              value={
+                <BoolText val={p.device.enabled} positive="YES" negative="NO" />
+              }
             />
             <DeviceInfoProperty
               label="Maximum number of relays"

central_frontend/src/routes/DevicesRoute.tsx

@@ -15,10 +15,11 @@ import React from "react";
 import { Link, useNavigate } from "react-router-dom";
 import { Device, DeviceApi, DevicesState, DeviceURL } from "../api/DeviceApi";
 import { AsyncWidget } from "../widgets/AsyncWidget";
+import { BoolText } from "../widgets/BoolText";
 import { SolarEnergyRouteContainer } from "../widgets/SolarEnergyRouteContainer";
 import { TimeWidget } from "../widgets/TimeWidget";
 
-export function DevicesRoute(): React.ReactElement {
+export function DevicesRoute(p: { homeWidget?: boolean }): React.ReactElement {
   const loadKey = React.useRef(1);
 
   const [list, setList] = React.useState<Device[] | undefined>();
@@ -37,6 +38,7 @@ export function DevicesRoute(): React.ReactElement {
 
   return (
     <SolarEnergyRouteContainer
+      homeWidget={p.homeWidget}
       label="Devices"
       actions={
         <Tooltip title="Refresh table">
@@ -80,12 +82,12 @@ function ValidatedDevicesList(p: {
         <TableHead>
           <TableRow>
             <TableCell>#</TableCell>
-            <TableCell>Model</TableCell>
-            <TableCell>Version</TableCell>
-            <TableCell>Max number of relays</TableCell>
-            <TableCell>Created</TableCell>
-            <TableCell>Updated</TableCell>
-            <TableCell>Status</TableCell>
+            <TableCell align="center">Model</TableCell>
+            <TableCell align="center">Version</TableCell>
+            <TableCell align="center">Max relays</TableCell>
+            <TableCell align="center">Created</TableCell>
+            <TableCell align="center">Updated</TableCell>
+            <TableCell align="center">Status</TableCell>
             <TableCell></TableCell>
           </TableRow>
         </TableHead>
@@ -99,21 +101,21 @@ function ValidatedDevicesList(p: {
               <TableCell component="th" scope="row">
                 {dev.id}
               </TableCell>
-              <TableCell>{dev.info.reference}</TableCell>
-              <TableCell>{dev.info.version}</TableCell>
-              <TableCell>{dev.info.max_relays}</TableCell>
-              <TableCell>
+              <TableCell align="center">{dev.info.reference}</TableCell>
+              <TableCell align="center">{dev.info.version}</TableCell>
+              <TableCell align="center">{dev.info.max_relays}</TableCell>
+              <TableCell align="center">
                 <TimeWidget time={dev.time_create} />
               </TableCell>
-              <TableCell>
+              <TableCell align="center">
                 <TimeWidget time={dev.time_update} />
               </TableCell>
               <TableCell align="center">
-                {p.states.get(dev.id)!.online ? (
-                  <strong>Online</strong>
-                ) : (
-                  <em>Offline</em>
-                )}
+                <BoolText
+                  val={p.states.get(dev.id)!.online}
+                  positive="Online"
+                  negative="Offline"
+                />
                 <br />
                 <TimeWidget diff time={p.states.get(dev.id)!.last_ping} />
               </TableCell>

central_frontend/src/routes/HomeRoute.tsx

@@ -2,6 +2,9 @@ import { Typography } from "@mui/material";
 import { CurrConsumptionWidget } from "./HomeRoute/CurrConsumptionWidget";
 import Grid from "@mui/material/Grid2";
 import { CachedConsumptionWidget } from "./HomeRoute/CachedConsumptionWidget";
+import { RelayConsumptionWidget } from "./HomeRoute/RelayConsumptionWidget";
+import { RelaysListRoute } from "./RelaysListRoute";
+import { DevicesRoute } from "./DevicesRoute";
 
 export function HomeRoute(): React.ReactElement {
   return (
@@ -18,9 +21,20 @@ export function HomeRoute(): React.ReactElement {
         <Grid size={{ xs: 12, sm: 6, lg: 3 }}>
           <CurrConsumptionWidget />
         </Grid>
+        <Grid size={{ xs: 12, sm: 6, lg: 3 }}>
+          <RelayConsumptionWidget />
+        </Grid>
         <Grid size={{ xs: 12, sm: 6, lg: 3 }}>
           <CachedConsumptionWidget />
         </Grid>
+
+        <Grid size={{ xs: 12, sm: 12, lg: 9 }}>
+          <DevicesRoute homeWidget />
+        </Grid>
+
+        <Grid size={{ xs: 12, sm: 12, lg: 9 }}>
+          <RelaysListRoute homeWidget />
+        </Grid>
       </Grid>
     </div>
   );

central_frontend/src/routes/HomeRoute/CachedConsumptionWidget.tsx

@@ -26,12 +26,6 @@ export function CachedConsumptionWidget(): React.ReactElement {
   });
 
   return (
-    <StatCard
-      title="Cached consumption"
-      data={[]}
-      interval="Current data"
-      trend="neutral"
-      value={val?.toString() ?? "Loading"}
-    />
+    <StatCard title="Cached consumption" value={val?.toString() ?? "Loading"} />
   );
 }

central_frontend/src/routes/HomeRoute/CurrConsumptionWidget.tsx

@@ -7,11 +7,14 @@ export function CurrConsumptionWidget(): React.ReactElement {
   const snackbar = useSnackbar();
 
   const [val, setVal] = React.useState<undefined | number>();
+  const [history, setHistory] = React.useState<number[] | undefined>();
 
   const refresh = async () => {
     try {
-      const s = await EnergyApi.CurrConsumption();
+      const s = await EnergyApi.GridConsumption();
+      const history = await EnergyApi.GridConsumptionHistory();
       setVal(s);
+      setHistory(history);
     } catch (e) {
       console.error(e);
       snackbar("Failed to refresh current consumption!");
@@ -19,7 +22,6 @@ export function CurrConsumptionWidget(): React.ReactElement {
   };
 
   React.useEffect(() => {
-    refresh();
     const i = setInterval(() => refresh(), 3000);
 
     return () => clearInterval(i);
@@ -28,9 +30,8 @@ export function CurrConsumptionWidget(): React.ReactElement {
   return (
     <StatCard
       title="Current consumption"
-      data={[]}
-      interval="Current data"
-      trend="neutral"
+      data={history ?? []}
+      interval="Last day"
       value={val?.toString() ?? "Loading"}
     />
   );

central_frontend/src/routes/HomeRoute/RelayConsumptionWidget.tsx

@@ -0,0 +1,38 @@
+import React from "react";
+import { EnergyApi } from "../../api/EnergyApi";
+import { useSnackbar } from "../../hooks/context_providers/SnackbarProvider";
+import StatCard from "../../widgets/StatCard";
+
+export function RelayConsumptionWidget(): React.ReactElement {
+  const snackbar = useSnackbar();
+
+  const [val, setVal] = React.useState<undefined | number>();
+  const [history, setHistory] = React.useState<number[] | undefined>();
+
+  const refresh = async () => {
+    try {
+      const s = await EnergyApi.RelaysConsumption();
+      const history = await EnergyApi.RelaysConsumptionHistory();
+      setVal(s);
+      setHistory(history);
+    } catch (e) {
+      console.error(e);
+      snackbar("Failed to refresh current relays consumption!");
+    }
+  };
+
+  React.useEffect(() => {
+    const i = setInterval(() => refresh(), 3000);
+
+    return () => clearInterval(i);
+  });
+
+  return (
+    <StatCard
+      title="Relays consumption"
+      data={history ?? []}
+      interval="Last day"
+      value={val?.toString() ?? "Loading"}
+    />
+  );
+}

central_frontend/src/routes/LoginRoute.tsx

@@ -62,7 +62,7 @@ export function LoginRoute() {
       <Grid
         size={{ sm: 4, md: 7, xs: false }}
         sx={{
-          backgroundImage: 'url("/sun.jpg")',
+          backgroundImage: 'url("/assets/sun.jpg")',
           backgroundColor: (t) =>
             t.palette.mode === "light"
               ? t.palette.grey[50]

central_frontend/src/routes/LogsRoute.tsx

@@ -0,0 +1,124 @@
+import NavigateBeforeIcon from "@mui/icons-material/NavigateBefore";
+import NavigateNextIcon from "@mui/icons-material/NavigateNext";
+import RefreshIcon from "@mui/icons-material/Refresh";
+import {
+  IconButton,
+  Paper,
+  Table,
+  TableBody,
+  TableCell,
+  TableContainer,
+  TableHead,
+  TableRow,
+  Tooltip,
+  Typography,
+} from "@mui/material";
+import { DatePicker } from "@mui/x-date-pickers";
+import dayjs from "dayjs";
+import React from "react";
+import { LogEntry, LogsAPI } from "../api/LogsAPI";
+import { AsyncWidget } from "../widgets/AsyncWidget";
+import { SolarEnergyRouteContainer } from "../widgets/SolarEnergyRouteContainer";
+
+export function LogsRoute(): React.ReactElement {
+  const loadKey = React.useRef(1);
+
+  const [currDate, setCurrDate] = React.useState(dayjs());
+
+  const [logs, setLogs] = React.useState<LogEntry[] | undefined>();
+
+  const load = async () => {
+    const logs = await LogsAPI.GetLogs(currDate);
+    logs.reverse();
+    setLogs(logs);
+  };
+
+  const reload = () => {
+    setLogs(undefined);
+    loadKey.current += 1;
+  };
+  return (
+    <SolarEnergyRouteContainer
+      label="Logs"
+      actions={
+        <Tooltip title="Refresh logs">
+          <IconButton onClick={reload}>
+            <RefreshIcon />
+          </IconButton>
+        </Tooltip>
+      }
+    >
+      <div
+        style={{
+          width: "100%",
+          display: "flex",
+          alignItems: "center",
+          justifyContent: "center",
+          marginBottom: "10px",
+        }}
+      >
+        <Tooltip title="Previous day">
+          <IconButton onClick={() => setCurrDate(currDate.add(-1, "day"))}>
+            <NavigateBeforeIcon />
+          </IconButton>
+        </Tooltip>
+        <DatePicker
+          label="Shown day"
+          value={currDate}
+          onChange={(d) => setCurrDate(d === null ? currDate : d)}
+        />
+        <Tooltip title="Next day">
+          <IconButton onClick={() => setCurrDate(currDate.add(1, "day"))}>
+            <NavigateNextIcon />
+          </IconButton>
+        </Tooltip>
+      </div>
+      <AsyncWidget
+        ready={!!logs}
+        loadKey={loadKey.current + currDate.toString()}
+        errMsg="Failed to load the logs!"
+        load={load}
+        build={() => <LogsView logs={logs!} />}
+      />
+    </SolarEnergyRouteContainer>
+  );
+}
+
+function LogsView(p: { logs: LogEntry[] }): React.ReactElement {
+  if (p.logs.length == 0) {
+    return (
+      <Typography style={{ textAlign: "center" }}>
+        There was no log recorded on this day.
+      </Typography>
+    );
+  }
+
+  return (
+    <TableContainer component={Paper}>
+      <Table sx={{ minWidth: 650 }} size="small" aria-label="a dense table">
+        <TableHead>
+          <TableRow>
+            <TableCell>Device ID</TableCell>
+            <TableCell>Time</TableCell>
+            <TableCell>Severity</TableCell>
+            <TableCell>Message</TableCell>
+          </TableRow>
+        </TableHead>
+        <TableBody>
+          {p.logs.map((row, id) => (
+            <TableRow key={id} hover>
+              <TableCell component="th" scope="row">
+                {row.device_id ?? "Backend"}
+              </TableCell>
+              <TableCell>
+                {new Date(row.time * 1000).toLocaleTimeString()}
+              </TableCell>
+              <TableCell>{row.severity}</TableCell>
+              <TableCell>{row.message}</TableCell>
+            </TableRow>
+          ))}
+        </TableBody>
+      </Table>
+    </TableContainer>
+  );
+}

central_frontend/src/routes/OTARoute.tsx

@@ -0,0 +1,203 @@
+import { mdiFolderUploadOutline } from "@mdi/js";
+import Icon from "@mdi/react";
+import DeleteIcon from "@mui/icons-material/Delete";
+import DownloadIcon from "@mui/icons-material/Download";
+import FileUploadIcon from "@mui/icons-material/FileUpload";
+import RefreshIcon from "@mui/icons-material/Refresh";
+import {
+  IconButton,
+  Paper,
+  Table,
+  TableBody,
+  TableCell,
+  TableContainer,
+  TableHead,
+  TableRow,
+  Tooltip,
+  Typography,
+} from "@mui/material";
+import { filesize } from "filesize";
+import React from "react";
+import { OTAAPI, OTAUpdate } from "../api/OTAApi";
+import { DeployOTAUpdateDialogProvider } from "../dialogs/DeployOTAUpdateDialogProvider";
+import { UploadUpdateDialog } from "../dialogs/UploadUpdateDialog";
+import { useAlert } from "../hooks/context_providers/AlertDialogProvider";
+import { useConfirm } from "../hooks/context_providers/ConfirmDialogProvider";
+import { useLoadingMessage } from "../hooks/context_providers/LoadingMessageProvider";
+import { useSnackbar } from "../hooks/context_providers/SnackbarProvider";
+import { AsyncWidget } from "../widgets/AsyncWidget";
+import { RouterLink } from "../widgets/RouterLink";
+import { SolarEnergyRouteContainer } from "../widgets/SolarEnergyRouteContainer";
+
+export function OTARoute(): React.ReactElement {
+  const [list, setList] = React.useState<string[] | undefined>();
+  const load = async () => {
+    setList(await OTAAPI.SupportedPlatforms());
+  };
+
+  return (
+    <AsyncWidget
+      loadKey={1}
+      ready={!!list}
+      load={load}
+      errMsg="Failed to load OTA screen!"
+      build={() => <_OTARoute platforms={list!} />}
+    />
+  );
+}
+
+function _OTARoute(p: { platforms: Array<string> }): React.ReactElement {
+  const key = React.useRef(1);
+  const [showUploadDialog, setShowUploadDialog] = React.useState(false);
+
+  const [list, setList] = React.useState<undefined | OTAUpdate[]>();
+
+  const load = async () => {
+    const list = await OTAAPI.ListOTAUpdates();
+    list.sort((a, b) =>
+      `${a.platform}#${a.version}`.localeCompare(`${b.platform}#${b.version}`)
+    );
+    list.reverse();
+    setList(list);
+  };
+
+  const reload = async () => {
+    key.current += 1;
+    setList(undefined);
+  };
+
+  return (
+    <SolarEnergyRouteContainer
+      label="OTA"
+      actions={
+        <span>
+          <Tooltip title="Refresh the list of updates">
+            <IconButton onClick={reload}>
+              <RefreshIcon />
+            </IconButton>
+          </Tooltip>
+          <Tooltip title="Upload a new update">
+            <IconButton onClick={() => setShowUploadDialog(true)}>
+              <FileUploadIcon />
+            </IconButton>
+          </Tooltip>
+        </span>
+      }
+    >
+      {showUploadDialog && (
+        <UploadUpdateDialog
+          platforms={p.platforms}
+          onClose={() => setShowUploadDialog(false)}
+          onCreated={() => {
+            setShowUploadDialog(false);
+            reload();
+          }}
+        />
+      )}
+      <AsyncWidget
+        loadKey={key.current}
+        ready={!!list}
+        errMsg="Failed to load the list of OTA updates!"
+        load={load}
+        build={() => <_OTAList list={list!} onReload={reload} />}
+      />
+    </SolarEnergyRouteContainer>
+  );
+}
+
+function _OTAList(p: {
+  list: OTAUpdate[];
+  onReload: () => void;
+}): React.ReactElement {
+  const alert = useAlert();
+  const confirm = useConfirm();
+  const loadingMessage = useLoadingMessage();
+  const snackbar = useSnackbar();
+
+  const [deployUpdate, setDeployUpdate] = React.useState<
+    OTAUpdate | undefined
+  >();
+
+  const deleteUpdate = async (update: OTAUpdate) => {
+    if (
+      !(await confirm(
+        `Do you really want to delete the update for platform ${update.platform} version ${update.version}?`
+      ))
+    )
+      return;
+
+    try {
+      loadingMessage.show("Deleting update...");
+
+      await OTAAPI.DeleteUpdate(update);
+
+      snackbar("The update was successfully deleted!");
+
+      p.onReload();
+    } catch (e) {
+      console.error("Failed to delete update!", e);
+      alert(`Failed to delete the update! ${e}`);
+    } finally {
+      loadingMessage.hide();
+    }
+  };
+
+  if (p.list.length === 0) {
+    return (
+      <Typography>
+        There is no OTA update uploaded on the platform yet.
+      </Typography>
+    );
+  }
+
+  return (
+    <>
+      {deployUpdate && (
+        <DeployOTAUpdateDialogProvider
+          update={deployUpdate!}
+          onClose={() => setDeployUpdate(undefined)}
+        />
+      )}
+      <TableContainer component={Paper}>
+        <Table sx={{ minWidth: 650 }} aria-label="list of updates">
+          <TableHead>
+            <TableRow>
+              <TableCell align="center">Platform</TableCell>
+              <TableCell align="center">Version</TableCell>
+              <TableCell align="center">File size</TableCell>
+              <TableCell align="center"></TableCell>
+            </TableRow>
+          </TableHead>
+          <TableBody>
+            {p.list.map((row, num) => (
+              <TableRow hover key={num}>
+                <TableCell align="center">{row.platform}</TableCell>
+                <TableCell align="center">{row.version}</TableCell>
+                <TableCell align="center">{filesize(row.file_size)}</TableCell>
+                <TableCell align="center">
+                  <Tooltip title="Deploy the update to devices">
+                    <IconButton onClick={() => setDeployUpdate(row)}>
+                      <Icon path={mdiFolderUploadOutline} size={1} />
+                    </IconButton>
+                  </Tooltip>
+                  <Tooltip title="Download a copy of the firmware">
+                    <RouterLink to={OTAAPI.DownloadOTAUpdateURL(row)}>
+                      <IconButton>
+                        <DownloadIcon />
+                      </IconButton>
+                    </RouterLink>
+                  </Tooltip>
+                  <Tooltip title="Delete firmware update">
+                    <IconButton onClick={() => deleteUpdate(row)}>
+                      <DeleteIcon />
+                    </IconButton>
+                  </Tooltip>
+                </TableCell>
+              </TableRow>
+            ))}
+          </TableBody>
+        </Table>
+      </TableContainer>
+    </>
+  );
+}

central_frontend/src/routes/RelaysListRoute.tsx

@@ -1,3 +1,4 @@
+import LinkIcon from "@mui/icons-material/Link";
 import RefreshIcon from "@mui/icons-material/Refresh";
 import {
   IconButton,
@@ -9,23 +10,31 @@ import {
   TableHead,
   TableRow,
   Tooltip,
+  Typography,
 } from "@mui/material";
 import React from "react";
-import { DeviceRelay } from "../api/DeviceApi";
+import { useNavigate } from "react-router-dom";
+import { Device, DeviceApi, DeviceRelay, DeviceURL } from "../api/DeviceApi";
 import { RelayApi, RelaysStatus } from "../api/RelayApi";
 import { AsyncWidget } from "../widgets/AsyncWidget";
 import { BoolText } from "../widgets/BoolText";
 import { SolarEnergyRouteContainer } from "../widgets/SolarEnergyRouteContainer";
 import { TimeWidget } from "../widgets/TimeWidget";
+import { CopyToClipboard } from "../widgets/CopyToClipboard";
+import { ServerApi } from "../api/ServerApi";
 
-export function RelaysListRoute(): React.ReactElement {
+export function RelaysListRoute(p: {
+  homeWidget?: boolean;
+}): React.ReactElement {
   const loadKey = React.useRef(1);
 
   const [list, setList] = React.useState<DeviceRelay[] | undefined>();
+  const [devices, setDevices] = React.useState<Device[] | undefined>();
   const [status, setStatus] = React.useState<RelaysStatus | undefined>();
 
   const load = async () => {
     setList(await RelayApi.GetList());
+    setDevices(await DeviceApi.ValidatedList());
     setStatus(await RelayApi.GetRelaysStatus());
 
     list?.sort((a, b) => b.priority - a.priority);
@@ -37,8 +46,10 @@ export function RelaysListRoute(): React.ReactElement {
   };
 
   return (
+    <>
       <SolarEnergyRouteContainer
         label="Relays list"
+        homeWidget={p.homeWidget}
         actions={
           <Tooltip title="Refresh list">
             <IconButton onClick={reload}>
@@ -53,21 +64,39 @@ export function RelaysListRoute(): React.ReactElement {
           errMsg="Failed to load the list of relays!"
           load={load}
           build={() => (
-          <RelaysList onReload={reload} list={list!} status={status!} />
+            <RelaysList
+              onReload={reload}
+              list={list!}
+              devices={devices!}
+              status={status!}
+            />
           )}
         />
       </SolarEnergyRouteContainer>
+    </>
   );
 }
 
 function RelaysList(p: {
   list: DeviceRelay[];
+  devices: Device[];
   status: RelaysStatus;
   onReload: () => void;
 }): React.ReactElement {
+  const navigate = useNavigate();
+
+  const openDevicePage = (relay: DeviceRelay) => {
+    const dev = p.devices.find((d) => d.relays.find((r) => r.id === relay.id));
+    navigate(DeviceURL(dev!));
+  };
+
+  if (p.list.length === 0) {
+    return <Typography>There is no configured relay yet!</Typography>;
+  }
+
   return (
     <TableContainer component={Paper}>
-      <Table sx={{ minWidth: 650 }} aria-label="simple table">
+      <Table sx={{ minWidth: 650 }}>
         <TableHead>
           <TableRow>
             <TableCell>Name</TableCell>
@@ -75,6 +104,7 @@ function RelaysList(p: {
             <TableCell>Priority</TableCell>
             <TableCell>Consumption</TableCell>
             <TableCell>Status</TableCell>
+            <TableCell></TableCell>
           </TableRow>
         </TableHead>
         <TableBody>
@@ -82,6 +112,8 @@ function RelaysList(p: {
             <TableRow
               key={row.name}
               sx={{ "&:last-child td, &:last-child th": { border: 0 } }}
+              hover
+              onDoubleClick={() => openDevicePage(row)}
             >
               <TableCell>{row.name}</TableCell>
               <TableCell>
@@ -97,6 +129,20 @@ function RelaysList(p: {
                 />{" "}
                 for <TimeWidget diff time={p.status.get(row.id)!.for} />
               </TableCell>
+              <TableCell>
+                <Tooltip title="Copy legacy api status">
+                  <CopyToClipboard
+                    content={
+                      ServerApi.Config.unsecure_origin +
+                      `/relay/${row.id}/legacy_state`
+                    }
+                  >
+                    <IconButton>
+                      <LinkIcon />
+                    </IconButton>
+                  </CopyToClipboard>
+                </Tooltip>
+              </TableCell>
             </TableRow>
           ))}
         </TableBody>

central_frontend/src/utils/StringsUtils.ts

@@ -1,3 +1,4 @@
+import { SemVer } from "semver";
 import { LenConstraint } from "../api/ServerApi";
 
 /**
@@ -6,3 +7,16 @@ import { LenConstraint } from "../api/ServerApi";
 export function lenValid(s: string, c: LenConstraint): boolean {
   return s.length >= c.min && s.length <= c.max;
 }
+
+/**
+ * Check out whether a given version number respect semantics requirements or not
+ */
+export function checkVersion(v: string): boolean {
+  try {
+    new SemVer(v, { loose: false });
+    return true;
+  } catch (e) {
+    console.error(e);
+    return false;
+  }
+}

central_frontend/src/widgets/CopyToClipboard.tsx

@@ -0,0 +1,30 @@
+import { ButtonBase } from "@mui/material";
+import { PropsWithChildren } from "react";
+import { useSnackbar } from "../hooks/context_providers/SnackbarProvider";
+
+export function CopyToClipboard(
+  p: PropsWithChildren<{ content: string }>
+): React.ReactElement {
+  const snackbar = useSnackbar();
+
+  const copy = () => {
+    navigator.clipboard.writeText(p.content);
+    snackbar(`${p.content} copied to clipboard.`);
+  };
+
+  return (
+    <ButtonBase
+      onClick={copy}
+      style={{
+        display: "inline-block",
+        alignItems: "unset",
+        textAlign: "unset",
+        position: "relative",
+        padding: "0px",
+      }}
+      disableRipple
+    >
+      {p.children}
+    </ButtonBase>
+  );
+}

central_frontend/src/widgets/SolarEnergyNavList.tsx

@@ -1,4 +1,11 @@
-import { mdiChip, mdiElectricSwitch, mdiHome, mdiNewBox } from "@mdi/js";
+import {
+  mdiChip,
+  mdiElectricSwitch,
+  mdiHome,
+  mdiMonitorArrowDown,
+  mdiNewBox,
+  mdiNotebookMultiple,
+} from "@mdi/js";
 import Icon from "@mdi/react";
 import {
   List,
@@ -35,6 +42,16 @@ export function SolarEnergyNavList(): React.ReactElement {
         uri="/relays"
         icon={<Icon path={mdiElectricSwitch} size={1} />}
       />
+      <NavLink
+        label="OTA"
+        uri="/ota"
+        icon={<Icon path={mdiMonitorArrowDown} size={1} />}
+      />
+      <NavLink
+        label="Logging"
+        uri="/logs"
+        icon={<Icon path={mdiNotebookMultiple} size={1} />}
+      />
     </List>
   );
 }

central_frontend/src/widgets/SolarEnergyRouteContainer.tsx

@@ -4,20 +4,28 @@ import React, { PropsWithChildren } from "react";
 export function SolarEnergyRouteContainer(
   p: {
     label: string;
+    homeWidget?: boolean;
     actions?: React.ReactElement;
   } & PropsWithChildren
 ): React.ReactElement {
   return (
-    <div style={{ margin: "50px" }}>
+    <div
+      style={{
+        margin: p.homeWidget ? "0px" : "50px",
+        flex: 1,
+        maxWidth: "1300px",
+      }}
+    >
       <div
         style={{
           display: "flex",
           justifyContent: "space-between",
           alignItems: "center",
           marginBottom: "20px",
+          flex: 1,
         }}
       >
-        <Typography variant="h4">{p.label}</Typography>
+        <Typography variant={p.homeWidget ? "h6" : "h4"}>{p.label}</Typography>
         {p.actions ?? <></>}
       </div>
 

central_frontend/src/widgets/StatCard.tsx

@@ -11,24 +11,25 @@ import { areaElementClasses } from "@mui/x-charts/LineChart";
 export type StatCardProps = {
   title: string;
   value: string;
-  interval: string;
-  trend: "up" | "down" | "neutral";
-  data: number[];
+  interval?: string;
+  trend?: "up" | "down" | "neutral";
+  data?: number[];
 };
 
-function getDaysInMonth(month: number, year: number) {
-  const date = new Date(year, month, 0);
-  const monthName = date.toLocaleDateString("en-US", {
-    month: "short",
-  });
-  const daysInMonth = date.getDate();
-  const days = [];
-  let i = 1;
-  while (days.length < daysInMonth) {
-    days.push(`${monthName} ${i}`);
-    i += 1;
+function last24Hours(): string[] {
+  let res: Array<string> = [];
+
+  for (let index = 0; index < 3600 * 24; index += 60 * 10) {
+    const date = new Date();
+    date.setTime(date.getTime() - index * 1000);
+    res.push(date.getHours() + "h" + date.getMinutes());
   }
-  return days;
+
+  res.reverse();
+
+  console.log(res);
+
+  return res;
 }
 
 function AreaGradient({ color, id }: { color: string; id: string }) {
@@ -50,7 +51,6 @@ export default function StatCard({
   data,
 }: StatCardProps) {
   const theme = useTheme();
-  const daysInWeek = getDaysInMonth(4, 2024);
 
   const trendColors = {
     up:
@@ -73,8 +73,8 @@ export default function StatCard({
     neutral: "default" as const,
   };
 
-  const color = labelColors[trend];
-  const chartColor = trendColors[trend];
+  const color = labelColors[trend ?? "neutral"];
+  const chartColor = trendColors[trend ?? "neutral"];
   const trendValues = { up: "+25%", down: "-25%", neutral: "+5%" };
 
   return (
@@ -95,13 +95,16 @@ export default function StatCard({
               <Typography variant="h4" component="p">
                 {value}
               </Typography>
+              {trend && (
                 <Chip size="small" color={color} label={trendValues[trend]} />
+              )}
             </Stack>
             <Typography variant="caption" sx={{ color: "text.secondary" }}>
               {interval}
             </Typography>
           </Stack>
-          <Box sx={{ width: "100%", height: 50 }}>
+          <Box sx={{ width: "100%", height: 100 }}>
+            {data && interval && (
               <SparkLineChart
                 colors={[chartColor]}
                 data={data}
@@ -110,7 +113,7 @@ export default function StatCard({
                 showTooltip
                 xAxis={{
                   scaleType: "band",
-                data: daysInWeek, // Use the correct property 'data' for xAxis
+                  data: last24Hours(),
                 }}
                 sx={{
                   [`& .${areaElementClasses.root}`]: {
@@ -118,8 +121,12 @@ export default function StatCard({
                   },
                 }}
               >
-              <AreaGradient color={chartColor} id={`area-gradient-${value}`} />
+                <AreaGradient
+                  color={chartColor}
+                  id={`area-gradient-${value}`}
+                />
               </SparkLineChart>
+            )}
           </Box>
         </Stack>
       </CardContent>

central_frontend/src/widgets/TimeWidget.tsx

@@ -61,7 +61,10 @@ export function TimeWidget(p: {
 }): React.ReactElement {
   if (!p.time) return <></>;
   return (
-    <Tooltip title={formatDate(p.time)} arrow>
+    <Tooltip
+      title={formatDate(p.diff ? new Date().getTime() / 1000 - p.time : p.time)}
+      arrow
+    >
       <span>{p.diff ? timeDiff(0, p.time) : timeDiffFromNow(p.time)}</span>
     </Tooltip>
   );

custom_consumption/Cargo.lock

@@ -697,9 +697,9 @@ dependencies = [
 
 [[package]]
 name = "clap"
-version = "4.5.18"
+version = "4.5.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0956a43b323ac1afaffc053ed5c4b7c1f1800bacd1683c353aabbb752515dd3"
+checksum = "b97f376d85a664d5837dbae44bf546e6477a679ff6610010f17276f686d867e8"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -707,9 +707,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.18"
+version = "4.5.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d72166dd41634086d5803a47eb71ae740e61d84709c36f3c34110173db3961b"
+checksum = "19bc80abd44e4bed93ca373a0704ccbd1b710dc5749406201bb018272808dc54"
 dependencies = [
  "anstream",
  "anstyle",
@@ -1729,7 +1729,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e310b3a6b5907f99202fcdb4960ff45b93735d7c7d96b760fcff8db2dc0e103d"
 dependencies = [
  "cfg-if",
- "windows-targets 0.52.5",
+ "windows-targets 0.48.5",
 ]
 
 [[package]]

docs/SETUP_DEV.md

@@ -0,0 +1,106 @@
+# Setup development environment
+
+## Backend
+To build the backend, you will need to install:
+
+* Rust: https://www.rust-lang.org/
+* An IDE with Rust support. I would definitly recommend [RustRover](https://www.jetbrains.com/rust/) (the tool from IntelliJ).
+
+Check if your environment is working using the following command:
+
+```bash
+cargo fmt && cargo clippy && cargo run -- --help
+```
+
+For development, the following flags might prove being useful:
+* `--unsecure-disable-login`: Disable authentication on all web API endpoints
+* `--hostname`: Change public server hostname, if you want to expose your test instance to network device, such as an ESP32
+
+## Custom consumption
+Same requirements as for the backend. This tool spawns a gui that allows to set arbitrary consumption values:
+
+![Custom consumption](img/custom_consumption.png)
+
+
+To use it, first launch this tool:
+
+```bash
+cd custom_consumption
+cargo run
+```
+
+Set a custom value to force file creation (in the UI).
+
+Then launch central backend (in another terminal):
+
+```bash
+cd central_backend
+cargo fmt && cargo clippy && RUST_LOG=debug cargo run -- file
+```
+
+
+## Central frontend
+The frontend has been built using [NodeJS](https://nodejs.org/en), [Vite](https://vite.dev/) and [MUI](https://mui.com/).
+
+Launch it using this command:
+
+```bash
+cd central_frontend
+npm run dev
+```
+
+## Python device
+This component has been built using ... Python. Waw!
+
+You will need to install this dependency, first:
+```bash
+apt install python3-jwt
+```
+
+
+Run the client:
+
+```bash
+cd python_device
+python3 -m src.main
+
+# Get CLI help
+python3 -m src.main --help
+```
+
+
+Reformat code:
+
+```bash
+black src/*.py
+```
+
+## ESP32 device
+The ESP32 device is in reality a [Wt32-Eth01](https://en.wireless-tag.com/product-item-2.html) device. Use the following mapping to setup dev env:
+
+![ESP mapping](img/esp_mapping.png)
+
+You can use a [CP2102](https://fr.aliexpress.com/item/4000120687489.html) to flash the ESP32.
+
+I recommend to use VSCode with the following extensions:
+* [ESP-IDF](https://marketplace.visualstudio.com/items?itemName=espressif.esp-idf-extension)
+* [C/C++](https://marketplace.visualstudio.com/items?itemName=ms-vscode.cpptools)
+* [Prettier](https://marketplace.visualstudio.com/items?itemName=esbenp.prettier-vscode)
+
+To build the project, use this command (in an ESP-IDF terminal):
+
+```bash
+idf.py build
+```
+
+To flash the ESP32, use this one:
+
+```bash
+idf.py flash
+```
+
+To capture logs from device, use either `cu` or the following command:
+
+```
+idf.py monitor
+```

docs/SETUP_PROD.md

@@ -0,0 +1,125 @@
+# Configure project for production
+
+## Create production build
+
+### Central
+The production release of central backend and frontend can be realised on a computer which has NodeJS and Rust installed by executing the following command at the root of the project:
+
+```bash
+make
+```
+
+The backend will be available at this location:
+
+```
+central_backend/target/release/central_backend
+```
+
+### Python device
+The Python device isn't production ready yet.
+
+
+### ESP32 device
+
+#### Flashing the device directly
+Use the following commands to flash a device (inside ESP-IDF environnment):
+
+```bash
+idf.py build
+idf.py flash
+```
+
+
+#### Getting an OTA update
+Use the following command to build an OTA update:
+
+```bash
+idf.py build
+```
+
+The OTA update is then located in `build/main.bin`
+
+
+## Pre-requisites
+* A server running a recent Linux (Debian / Ubuntu preferred) with `central` as hostname
+* DHCP configured on the network
+
+## Configure server
+
+### Create a user dedicated to the central
+```bash
+sudo adduser --disabled-login central
+```
+
+### Install binary
+You can use `scp` to copy the binary to the target server:
+
+```bash
+scp central_backend/target/release/central_backend pierre@central:/home/pierre
+```
+
+Then the executable must be installed system-wide:
+
+```bash
+sudo mv central_backend /usr/local/bin/
+```
+
+### Create configuration file
+Create a configuration file in `/home/central/config.yaml`:
+
+```bash
+sudo touch /home/central/config.yaml
+sudo chown central:central /home/central/config.yaml
+sudo chmod 400 /home/central/config.yaml
+sudo nano /home/central/config.yaml
+```
+
+Sample configuration:
+
+```conf
+SECRET=RANDOM_VALUE
+COOKIE_SECURE=true
+LISTEN_ADDRESS=0.0.0.0:443
+ADMIN_USERNAME=admin
+ADMIN_PASSWORD=FIXME
+HOSTNAME=central.local
+STORAGE=/home/central/storage
+FRONIUS_ORIG=http://10.0.0.10
+```
+
+### Test configuration
+Run the following command to check if the configuration is working:
+
+```bash
+sudo -u central central_backend -c /home/central/config.yaml fronius -c
+```
+
+### Create systemd unit file
+Once you confirmed the configuration is working, you can configure a system service, in `/etc/systemd/system/central.service`:
+
+```conf
+[Unit]
+Description=Central backend server
+After=syslog.target
+After=network.target
+
+[Service]
+RestartSec=2s
+Type=simple
+User=central
+Group=central
+WorkingDirectory=/home/central
+ExecStart=/usr/local/bin/central_backend -c /home/central/config.yaml fronius -c
+Restart=always
+Environment=USER=central 
+HOME=/home/central
+
+[Install]
+WantedBy=multi-user.target
+```
+
+Enable & start service:
+```bash
+sudo systemctl enable central
+sudo systemctl start central
+```

esp32_device/.vscode/settings.json

@@ -49,6 +49,12 @@
     "regex": "c",
     "stdlib.h": "c",
     "secure_api.h": "c",
-    "jwt.h": "c"
+    "jwt.h": "c",
+    "sync_response.h": "c",
+    "gpio.h": "c",
+    "esp_system.h": "c",
+    "relays.h": "c",
+    "esp_app_desc.h": "c",
+    "ota.h": "c"
   }
 }

esp32_device/README.md

@@ -1,3 +1,18 @@
 # ESP32 device
 
 ESP32 client device, using `W32-ETH01` device
+
+## Some commands
+
+Create a new firmware build:
+
+```bash
+idf.py build
+```
+
+Upload firmware to central backend, in dev mode:
+
+```bash
+curl -k -X POST  https://localhost:8443/web_api/ota/Wt32-Eth01/$(cat version.txt) --form firmware="@build/main.bin"
+curl -k -X POST  https://localhost:8443/web_api/ota/set_desired_version --header "Content-Type: application/json" --data "{\"platform\": \"Wt32-Eth01\", \"version\": \"$(cat version.txt)\"}"
+```

esp32_device/build_upload_dev.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+idf.py build && \
+    curl -k -X POST  https://localhost:8443/web_api/ota/Wt32-Eth01/$(cat version.txt) --form firmware="@build/main.bin" && \
+    curl -k -X POST  https://localhost:8443/web_api/ota/set_desired_version --header "Content-Type: application/json" --data "{\"platform\": \"Wt32-Eth01\", \"version\": \"$(cat version.txt)\"}"

esp32_device/main/CMakeLists.txt

@@ -1,4 +1,4 @@
-idf_component_register(SRCS "jwt.c" "secure_api.c" "http_client.c" "ethernet.c" "unsecure_api.c" "system.c" "crypto.c" "random.c" "storage.c" "main.c"
+idf_component_register(SRCS "ota.c" "relays.c" "sync_response.c" "jwt.c" "secure_api.c" "http_client.c" "ethernet.c" "unsecure_api.c" "system.c" "crypto.c" "random.c" "storage.c" "main.c"
                         "dev_name.c"
                     INCLUDE_DIRS ".")
 

esp32_device/main/constants.h

@@ -5,16 +5,6 @@
  */
 #define DEV_REFERENCE "Wt32-Eth01"
 
-/**
- * Device version
- */
-#define DEV_VERSION "0.0.1"
-
-/**
- * Device max number of relays
- */
-#define DEV_MAX_RELAYS 1
-
 /**
  * Backend unsecure API URL
  */
@@ -44,3 +34,13 @@
  * Secure origin len
  */
 #define SEC_ORIG_LEN 255
+
+/**
+ * Interval of time (in seconds) between two synchronisations
+ */
+#define SYNC_TIME_INTERVAL 5
+
+/**
+ * OTA download timeout (in milliseconds)
+ */
+#define OTA_REC_TIMEOUT 15000

esp32_device/main/crypto.c

@@ -29,12 +29,12 @@ static void seed_ctr_drbg_context(mbedtls_entropy_context *entropy, mbedtls_ctr_
     mbedtls_entropy_init(entropy);
     mbedtls_ctr_drbg_init(ctr_drbg);
 
-    ESP_LOGI(TAG, "Seed Mbedtls\n");
+    ESP_LOGI(TAG, "Seed Mbedtls");
     if ((ret = mbedtls_ctr_drbg_seed(ctr_drbg, mbedtls_entropy_func, entropy,
                                      (const unsigned char *)pers,
                                      strlen(pers))) != 0)
     {
-        ESP_LOGE(TAG, " failed\n  ! mbedtls_ctr_drbg_seed returned %d\n", ret);
+        ESP_LOGE(TAG, " failed\n  ! mbedtls_ctr_drbg_seed returned %d", ret);
         reboot();
     }
 }
@@ -54,7 +54,7 @@ bool crypto_gen_priv_key()
     mbedtls_ctr_drbg_context ctr_drbg;
     seed_ctr_drbg_context(&entropy, &ctr_drbg);
 
-    ESP_LOGI(TAG, "PK info from type\n");
+    ESP_LOGI(TAG, "PK info from type");
     if ((ret = mbedtls_pk_setup(&key, mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY))) != 0)
     {
         ESP_LOGE(TAG, " failed\n  !  mbedtls_pk_setup returned -0x%04x", (unsigned int)-ret);
@@ -62,7 +62,7 @@ bool crypto_gen_priv_key()
     }
 
     // Generate private key
-    ESP_LOGI(TAG, "Generate private key\n");
+    ESP_LOGI(TAG, "Generate private key");
     ret = mbedtls_ecp_gen_key(ECPARAMS,
                               mbedtls_pk_ec(key),
                               mbedtls_ctr_drbg_random, &ctr_drbg);
@@ -74,7 +74,7 @@ bool crypto_gen_priv_key()
     }
 
     // Export private key
-    ESP_LOGI(TAG, "Export private key\n");
+    ESP_LOGI(TAG, "Export private key");
     unsigned char *key_buff = malloc(PRV_KEY_DER_MAX_BYTES);
     if ((ret = mbedtls_pk_write_key_der(&key, key_buff, PRV_KEY_DER_MAX_BYTES)) < 1)
     {
@@ -108,7 +108,7 @@ void crypto_print_priv_key()
     mbedtls_ctr_drbg_context ctr_drbg;
     seed_ctr_drbg_context(&entropy, &ctr_drbg);
 
-    ESP_LOGI(TAG, "Parse private key (len = %d)\n", key_len);
+    ESP_LOGI(TAG, "Parse private key (len = %d)", key_len);
     if ((ret = mbedtls_pk_parse_key(&key, key_buff, key_len, NULL, 0, mbedtls_ctr_drbg_random, &ctr_drbg)) != 0)
     {
         ESP_LOGE(TAG, " failed\n  !  mbedtls_pk_parse_key returned -0x%04x",
@@ -117,7 +117,7 @@ void crypto_print_priv_key()
     }
     free(key_buff);
 
-    ESP_LOGI(TAG, "Show private key\n");
+    ESP_LOGI(TAG, "Show private key");
     unsigned char *out = malloc(16000);
     memset(out, 0, 16000);
     if ((ret = mbedtls_pk_write_key_pem(&key, out, 16000)) != 0)
@@ -135,6 +135,46 @@ void crypto_print_priv_key()
     mbedtls_entropy_free(&entropy);
 }
 
+/**
+ * Get secret point value of our private key
+ */
+static bool crypto_get_priv_key_mpi(mbedtls_mpi *dst)
+{
+    int ret;
+
+    unsigned char *key_buff = malloc(PRV_KEY_DER_MAX_BYTES);
+    size_t key_len = storage_get_priv_key(key_buff);
+    assert(key_len > 0);
+
+    mbedtls_pk_context key;
+    mbedtls_pk_init(&key);
+
+    mbedtls_entropy_context entropy;
+    mbedtls_ctr_drbg_context ctr_drbg;
+    seed_ctr_drbg_context(&entropy, &ctr_drbg);
+
+    ESP_LOGI(TAG, "Parse private key (len = %d)", key_len);
+    if ((ret = mbedtls_pk_parse_key(&key, key_buff, key_len, NULL, 0, mbedtls_ctr_drbg_random, &ctr_drbg)) != 0)
+    {
+        ESP_LOGE(TAG, " failed\n  !  mbedtls_pk_parse_key returned -0x%04x",
+                 (unsigned int)-ret);
+        reboot();
+    }
+    free(key_buff);
+
+    ESP_LOGI(TAG, "Extract private key");
+    mbedtls_ecp_keypair *kp = mbedtls_pk_ec(key);
+
+    mbedtls_mpi_init(dst);
+    mbedtls_mpi_copy(dst, &kp->private_d);
+
+    mbedtls_pk_free(&key);
+    mbedtls_ctr_drbg_free(&ctr_drbg);
+    mbedtls_entropy_free(&entropy);
+
+    return true;
+}
+
 char *crypto_get_csr()
 {
     int ret;
@@ -150,7 +190,7 @@ char *crypto_get_csr()
     mbedtls_ctr_drbg_context ctr_drbg;
     seed_ctr_drbg_context(&entropy, &ctr_drbg);
 
-    ESP_LOGI(TAG, "Parse private key (len = %d)\n", key_len);
+    ESP_LOGI(TAG, "Parse private key (len = %d)", key_len);
     if ((ret = mbedtls_pk_parse_key(&key, key_buff, key_len, NULL, 0, mbedtls_ctr_drbg_random, &ctr_drbg)) != 0)
     {
         ESP_LOGE(TAG, " failed\n  !  mbedtls_pk_parse_key returned -0x%04x",
@@ -174,7 +214,7 @@ char *crypto_get_csr()
         reboot();
     }
 
-    ESP_LOGI(TAG, "Sign CSR with private key\n");
+    ESP_LOGI(TAG, "Sign CSR with private key");
     mbedtls_x509write_csr_set_key(&req, &key);
 
     char *csr = malloc(4096);
@@ -217,11 +257,92 @@ char *crypto_encode_base64_safe_url(const char *src, size_t srclen)
         return NULL;
     }
 
-    if (out[olen - 1] == '=')
-        out[olen - 1] = '\0';
-
-    if (out[olen - 2] == '=')
-        out[olen - 2] = '\0';
+    // Convert base64 encoding to base64URL
+    for (size_t i = 0; i < olen; i++)
+    {
+        switch (out[i])
+        {
+        case '+':
+            out[i] = '-';
+            break;
+        case '/':
+            out[i] = '_';
+            break;
+        case '=':
+            out[i] = '\0';
+            break;
+        }
+    }
 
     return out;
 }
+
+#define HASH_LEN 32
+
+char *crypto_sign_sha256_payload(const char *src, const size_t src_len, size_t *dstlen)
+{
+    int ret;
+    uint8_t r_be[32] = {0};
+    uint8_t s_be[32] = {0};
+
+    // Load private key
+    mbedtls_mpi key_mpi;
+    if (!crypto_get_priv_key_mpi(&key_mpi))
+    {
+        ESP_LOGE(TAG, "Failed to load private key MPI!");
+        return NULL;
+    }
+
+    mbedtls_entropy_context entropy;
+    mbedtls_ctr_drbg_context ctr_drbg;
+    seed_ctr_drbg_context(&entropy, &ctr_drbg);
+
+    mbedtls_mpi r, s;
+    mbedtls_mpi_init(&r);
+    mbedtls_mpi_init(&s);
+
+    mbedtls_ecdsa_context ecdsa_context;
+    mbedtls_ecdsa_init(&ecdsa_context);
+
+    mbedtls_ecp_group_load(&ecdsa_context.MBEDTLS_PRIVATE(grp), MBEDTLS_ECP_DP_SECP256R1);
+
+    // Compute sha256
+    uint8_t sha256_out[HASH_LEN] = {0};
+    mbedtls_sha256((unsigned char *)src, src_len, sha256_out, 0);
+
+    // Compute signature
+    ret = mbedtls_ecdsa_sign(&ecdsa_context.MBEDTLS_PRIVATE(grp), &r, &s, &key_mpi, sha256_out, HASH_LEN, mbedtls_ctr_drbg_random, &ctr_drbg);
+
+    // Extract R & S (as per RFC 7518)
+    mbedtls_mpi_write_binary(&r, r_be, 32);
+    mbedtls_mpi_write_binary(&s, s_be, 32);
+
+    mbedtls_ctr_drbg_free(&ctr_drbg);
+    mbedtls_entropy_free(&entropy);
+
+    mbedtls_mpi_free(&r);
+    mbedtls_mpi_free(&s);
+    mbedtls_mpi_free(&key_mpi);
+
+    mbedtls_ecdsa_free(&ecdsa_context);
+
+    if (ret != 0)
+    {
+        ESP_LOGE(TAG, "Failed to perfom base64 encoding!");
+        return NULL;
+    }
+
+    // Prepare output
+    char *out = calloc(1, 64);
+    if (!out)
+    {
+        ESP_LOGE(TAG, "Failed to allocate memory to store signature!");
+        return NULL;
+    }
+
+    memcpy(out, &r_be, 32);
+    memcpy(out + 32, &s_be, 32);
+
+    *dstlen = 64;
+    return out;
+}

esp32_device/main/crypto.h

@@ -39,6 +39,11 @@ extern "C"
      */
     char *crypto_encode_base64_safe_url(const char *src, size_t srclen);
 
+    /**
+     * Sign some data using sha256
+     */
+    char *crypto_sign_sha256_payload(const char *src, const size_t src_len, size_t *dstlen);
+
 #ifdef __cplusplus
 }
 #endif

esp32_device/main/dev_name.c

@@ -33,7 +33,7 @@ char *dev_name()
     char *dev = malloc(len + strlen(DEV_PREFIX) + 1);
     if (dev == NULL)
     {
-        ESP_LOGE(TAG, "Failed to allocate memory to store dev name!\n");
+        ESP_LOGE(TAG, "Failed to allocate memory to store dev name!");
         return NULL;
     }
 

esp32_device/main/ethernet.c

@@ -84,8 +84,8 @@ void ethernet_init()
     eth_esp32_emac_config_t mac_config = ETH_ESP32_EMAC_DEFAULT_CONFIG();
     mac_config.clock_config.rmii.clock_mode = EMAC_CLK_EXT_IN;
     mac_config.clock_config.rmii.clock_gpio = EMAC_CLK_IN_GPIO;
-    mac_config.smi_mdc_gpio_num = GPIO_NUM_23;
-    mac_config.smi_mdio_gpio_num = GPIO_NUM_18;
+    mac_config.smi_gpio.mdc_num = GPIO_NUM_23;
+    mac_config.smi_gpio.mdio_num = GPIO_NUM_18;
 
     eth_mac_config_t eth_mac_config = ETH_MAC_DEFAULT_CONFIG();
     eth_mac_config.sw_reset_timeout_ms = 1000;

esp32_device/main/jwt.c

@@ -77,10 +77,39 @@ char *jwt_gen(cJSON *payload)
     free(header_b64);
     free(body_b64);
 
-    // TODO : wip
-    printf("unsigned = %s\n", unsigned_jwt);
-    free(unsigned_jwt);
+    size_t sig_len = 0;
+    char *sig = crypto_sign_sha256_payload(unsigned_jwt, strlen(unsigned_jwt), &sig_len);
 
-    // TODO : continue
-    return strdup("TODO:)");
+    if (!sig || sig_len == 0)
+    {
+        ESP_LOGE(TAG, "Failed to sign JWT!");
+        if (sig)
+            free(sig);
+        free(unsigned_jwt);
+        return NULL;
+    }
+
+    char *sig_b64 = crypto_encode_base64_safe_url(sig, sig_len);
+    free(sig);
+    if (!sig_b64)
+    {
+        ESP_LOGE(TAG, "Failed to encode base64 signature to base64!");
+        free(unsigned_jwt);
+        return NULL;
+    }
+
+    char *jwt = calloc(1, 1 + strlen(unsigned_jwt) + 1 + strlen(sig_b64));
+    if (!jwt)
+    {
+        ESP_LOGE(TAG, "Failed to allocate memory to store final JWT!");
+        free(unsigned_jwt);
+        free(sig_b64);
+        return NULL;
+    }
+    sprintf(jwt, "%s.%s", unsigned_jwt, sig_b64);
+
+    free(unsigned_jwt);
+    free(sig_b64);
+
+    return jwt;
 }

esp32_device/main/main.c

@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include "esp_system.h"
 #include "esp_log.h"
+#include "esp_app_desc.h"
 
 #include "dev_name.h"
 #include "storage.h"
@@ -10,54 +11,60 @@
 #include "secure_api.h"
 #include "ethernet.h"
 #include "constants.h"
+#include "relays.h"
+#include "ota.h"
 
 static const char *TAG = "main";
 
 void app_main(void)
 {
-    esp_log_level_set("*", ESP_LOG_VERBOSE);
+    esp_log_level_set("*", ESP_LOG_INFO);
 
     system_show_free_memory();
 
-    ESP_LOGI(TAG, "SolarEnergy WT32-ETH01 device");
+    ESP_LOGI(TAG, "SolarEnergy WT32-ETH01 device version %s", esp_app_get_description()->version);
+
+    // Turn off all relays
+    relays_turn_off_all();
+    relays_setup();
 
     // Initialize storage
     if (storage_init() == false)
     {
-        ESP_LOGE(TAG, "Failed to init storage!\n");
+        ESP_LOGE(TAG, "Failed to init storage!");
         reboot();
     }
 
     // Give a name to the device
     if (dev_generate_name())
     {
-        ESP_LOGI(TAG, "Generated a new device name\n");
+        ESP_LOGI(TAG, "Generated a new device name");
     }
 
     char *name = dev_name();
-    ESP_LOGI(TAG, "Dev name: %s\n", name);
+    ESP_LOGI(TAG, "Dev name: %s", name);
     free(name);
 
     // Generate private key, if needed
     if (crypto_gen_priv_key())
     {
-        ESP_LOGI(TAG, "Generated device private key!\n");
+        ESP_LOGI(TAG, "Generated device private key!");
     }
-    ESP_LOGI(TAG, "Device private key:\n");
+    ESP_LOGI(TAG, "Device private key:");
     crypto_print_priv_key();
 
     // Show current private key
     char *csr = crypto_get_csr();
-    ESP_LOGI(TAG, "Current CSR:\n%s\n", csr);
+    ESP_LOGI(TAG, "Current CSR:\n%s", csr);
     free(csr);
 
     // Initialize network stack
-    ESP_LOGI(TAG, "Initialize network\n");
+    ESP_LOGI(TAG, "Initialize network");
     ethernet_init();
     ethernet_wait_for_network();
 
     // Get if secure origin endpoint is known
-    ESP_LOGI(TAG, "Check secure origin\n");
+    ESP_LOGI(TAG, "Check secure origin");
     if (storage_get_secure_origin(NULL) == 0)
     {
         char *sec_ori = unsecure_api_get_secure_origin();
@@ -71,7 +78,7 @@ void app_main(void)
     }
 
     // Print secure origin endpoint for debugging purposes
-    ESP_LOGI(TAG, "Get secure origin\n");
+    ESP_LOGI(TAG, "Get secure origin");
     char *sec_ori = calloc(SEC_ORIG_LEN, 1);
     assert(storage_get_secure_origin(sec_ori) > 0);
     ESP_LOGI(TAG, "Current secure origin: %s", sec_ori);
@@ -104,7 +111,7 @@ void app_main(void)
         // Check current device enrollment status
         ESP_LOGI(TAG, "Check enrollment status");
         enum DevEnrollmentStatus status = secure_api_get_device_enrollment_status();
-        ESP_LOGI(TAG, "Current enrollment status: %d\n", status);
+        ESP_LOGI(TAG, "Current enrollment status: %d", status);
 
         switch (status)
         {
@@ -166,23 +173,74 @@ void app_main(void)
 
     // Main loop
     ESP_LOGI(TAG, "Starting main loop");
+    secure_api_report_log_message(Info, "Starting program main loop");
 
-    // TODO : implement more properly
+    size_t fails = 0;
     while (true)
     {
-        if (!secure_api_sync_device())
+        sync_response *res = secure_api_sync_device();
+        if (!res)
         {
-            ESP_LOGE(TAG, "Failed to synchronise device!");
+            fails += 1;
+            ESP_LOGE(TAG, "Failed to synchronise device! (number=%d)", fails);
+
+            // Safely turn off all relays after a given number of failures
+            if (fails > 5)
+            {
+                ESP_LOGE(TAG, "Many failures, will stop all relays...");
+                relays_turn_off_all();
+            }
+
+            // Restart the card after too much failures
+            if (fails > 10)
+            {
+                ESP_LOGE(TAG, "Too many failures, will try to reboot in 3 secs...");
+                system_sleep(3);
+                reboot();
+            }
+
+            system_sleep(SYNC_TIME_INTERVAL);
+            continue;
+        }
+
+        fails = 0;
+
+        sync_response_print(res);
+
+        // Check for firmware update
+        if (res->available_update)
+        {
+            ESP_LOGI(TAG, "Will perform system upgrade to version %s!", res->available_update);
+            relays_turn_off_all();
+
+            secure_api_report_log_message(Info, "Device is starting the OTA procedure...");
+
+            if (ota_perform_update(res->available_update))
+            {
+                ESP_LOGI(TAG, "OTA update succesfully executed, will reboot...");
+                secure_api_report_log_message(Info, "Device successfully updated!");
             }
             else
             {
-            ESP_LOGI(TAG, "Successfully synchronised device!");
+                ESP_LOGE(TAG, "OTA update failed! Will reboot...");
+                secure_api_report_log_message(Error, "Device update failed!");
             }
 
-        system_sleep(10);
+            secure_api_report_log_message(Info, "Device will restart after OTA procedure...");
+
+            system_sleep(SYNC_TIME_INTERVAL);
+            reboot();
         }
 
-    system_sleep(120);
+        // Update relays configuration
+        for (size_t i = 0; i < relays_count(); i++)
+        {
+            relays_set(i, sync_response_is_relay_on(res, i));
+        }
+
+        sync_response_free(res);
+        system_sleep(SYNC_TIME_INTERVAL);
+    }
 
     reboot();
 }

esp32_device/main/ota.c

@@ -0,0 +1,232 @@
+#include "esp_log.h"
+#include "esp_partition.h"
+#include "esp_ota_ops.h"
+#include "esp_http_client.h"
+#include "esp_app_format.h"
+#include "constants.h"
+
+#include "ota.h"
+#include "storage.h"
+#include "secure_api.h"
+
+#include <string.h>
+
+const char *TAG = "ota";
+
+#define BUFF_SIZE 1024
+
+static void http_cleanup(esp_http_client_handle_t client)
+{
+    esp_http_client_close(client);
+    esp_http_client_cleanup(client);
+}
+
+bool ota_perform_update(const char *version)
+{
+    const esp_partition_t *configured = esp_ota_get_boot_partition();
+    const esp_partition_t *running = esp_ota_get_running_partition();
+
+    if (configured != running)
+    {
+        ESP_LOGW(TAG, "Configured OTA boot partition at offset 0x%08" PRIx32 ", but running from offset 0x%08" PRIx32,
+                 configured->address, running->address);
+        ESP_LOGW(TAG, "(This can happen if either the OTA boot data or preferred boot image become corrupted somehow.)");
+    }
+
+    ESP_LOGI(TAG, "Running partition type %d subtype %d (offset 0x%08" PRIx32 ")",
+             running->type, running->subtype, running->address);
+
+    // Determine firmware download URL
+    char *update_url = calloc(256, 1);
+    assert(update_url != NULL);
+    assert(storage_get_secure_origin(update_url) > 0);
+    strcat(update_url, "/devices_api/ota/Wt32-Eth01/");
+    strcat(update_url, version);
+    ESP_LOGI(TAG, "Firmware URL: %s", update_url);
+
+    char *root_ca = calloc(1, ROOT_CA_MAX_BYTES);
+    assert(root_ca);
+    assert(storage_get_root_ca(root_ca) > 0);
+
+    esp_http_client_config_t config = {
+        .url = update_url,
+        .cert_pem = root_ca,
+        .timeout_ms = OTA_REC_TIMEOUT,
+        .keep_alive_enable = true,
+    };
+
+    esp_http_client_handle_t client = esp_http_client_init(&config);
+
+    if (client == NULL)
+    {
+        ESP_LOGE(TAG, "Failed to initialise HTTP connection");
+        free(update_url);
+        free(root_ca);
+        return false;
+    }
+
+    int err = esp_http_client_open(client, 0);
+    free(update_url);
+    free(root_ca);
+    if (err != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to open HTTP connection: %s", esp_err_to_name(err));
+        esp_http_client_cleanup(client);
+        return false;
+    }
+
+    esp_http_client_fetch_headers(client);
+
+    const esp_partition_t *update_partition = esp_ota_get_next_update_partition(NULL);
+    assert(update_partition != NULL);
+    ESP_LOGI(TAG, "Writing to partition subtype %d at offset 0x%" PRIx32,
+             update_partition->subtype, update_partition->address);
+
+    // OTA update loop
+    int binary_file_length = 0;
+    esp_ota_handle_t update_handle = 0;
+    /*deal with all receive packet*/
+    bool image_header_was_checked = false;
+    char *ota_write_data = calloc(BUFF_SIZE + 1, 1);
+    while (1)
+    {
+        int data_read = esp_http_client_read(client, ota_write_data, BUFF_SIZE);
+        if (data_read < 0)
+        {
+            ESP_LOGE(TAG, "Error: SSL data read error");
+            http_cleanup(client);
+            free(ota_write_data);
+            return false;
+        }
+
+        if (data_read == 0)
+        {
+            /*
+             * As esp_http_client_read never returns negative error code, we rely on
+             * `errno` to check for underlying transport connectivity closure if any
+             */
+            if (errno == ECONNRESET || errno == ENOTCONN)
+            {
+                ESP_LOGE(TAG, "Connection closed, errno = %d", errno);
+                break;
+            }
+            if (esp_http_client_is_complete_data_received(client) == true)
+            {
+                ESP_LOGI(TAG, "Connection closed");
+                break;
+            }
+
+            // No data received yet
+            continue;
+        }
+
+        if (image_header_was_checked == false)
+        {
+            esp_app_desc_t new_app_info;
+            if (data_read > sizeof(esp_image_header_t) + sizeof(esp_image_segment_header_t) + sizeof(esp_app_desc_t))
+            {
+                // check current version with downloading
+                memcpy(&new_app_info, &ota_write_data[sizeof(esp_image_header_t) + sizeof(esp_image_segment_header_t)], sizeof(esp_app_desc_t));
+                ESP_LOGI(TAG, "New firmware version: %s", new_app_info.version);
+
+                esp_app_desc_t running_app_info;
+                if (esp_ota_get_partition_description(running, &running_app_info) == ESP_OK)
+                {
+                    ESP_LOGI(TAG, "Running firmware version: %s", running_app_info.version);
+                }
+
+                const esp_partition_t *last_invalid_app = esp_ota_get_last_invalid_partition();
+                esp_app_desc_t invalid_app_info;
+                if (esp_ota_get_partition_description(last_invalid_app, &invalid_app_info) == ESP_OK)
+                {
+                    ESP_LOGI(TAG, "Last invalid firmware version: %s", invalid_app_info.version);
+                }
+
+                // check current version with last invalid partition
+                if (last_invalid_app != NULL)
+                {
+                    if (memcmp(invalid_app_info.version, new_app_info.version, sizeof(new_app_info.version)) == 0)
+                    {
+
+                        ESP_LOGW(TAG, "New version is the same as invalid version.");
+                        ESP_LOGW(TAG, "Previously, there was an attempt to launch the firmware with %s version, but it failed.", invalid_app_info.version);
+                        ESP_LOGW(TAG, "The firmware has been rolled back to the previous version.");
+                        http_cleanup(client);
+                        free(ota_write_data);
+                        secure_api_report_log_message(Error, "New version is the same as last invalid version. Could not perform update!");
+                        return false;
+                    }
+                }
+
+                image_header_was_checked = true;
+
+                err = esp_ota_begin(update_partition, OTA_WITH_SEQUENTIAL_WRITES, &update_handle);
+                if (err != ESP_OK)
+                {
+                    ESP_LOGE(TAG, "esp_ota_begin failed (%s)", esp_err_to_name(err));
+                    http_cleanup(client);
+                    free(ota_write_data);
+                    esp_ota_abort(update_handle);
+                    return false;
+                }
+                ESP_LOGI(TAG, "esp_ota_begin succeeded");
+            }
+            else
+            {
+                ESP_LOGE(TAG, "received package is not fit len");
+                http_cleanup(client);
+                free(ota_write_data);
+                esp_ota_abort(update_handle);
+                return false;
+            }
+        }
+        err = esp_ota_write(update_handle, (const void *)ota_write_data, data_read);
+        if (err != ESP_OK)
+        {
+            http_cleanup(client);
+            free(ota_write_data);
+            esp_ota_abort(update_handle);
+            return false;
+        }
+        binary_file_length += data_read;
+        ESP_LOGD(TAG, "Written image length %d", binary_file_length);
+    }
+    free(ota_write_data);
+
+    ESP_LOGI(TAG, "Total Write binary data length: %d", binary_file_length);
+    if (esp_http_client_is_complete_data_received(client) != true)
+    {
+        ESP_LOGE(TAG, "Error in receiving complete file");
+        http_cleanup(client);
+        esp_ota_abort(update_handle);
+        return false;
+    }
+
+    err = esp_ota_end(update_handle);
+    if (err != ESP_OK)
+    {
+        if (err == ESP_ERR_OTA_VALIDATE_FAILED)
+        {
+            ESP_LOGE(TAG, "Image validation failed, image is corrupted");
+        }
+        else
+        {
+            ESP_LOGE(TAG, "esp_ota_end failed (%s)!", esp_err_to_name(err));
+        }
+        http_cleanup(client);
+        return false;
+    }
+
+    err = esp_ota_set_boot_partition(update_partition);
+    if (err != ESP_OK)
+    {
+        ESP_LOGE(TAG, "esp_ota_set_boot_partition failed (%s)!", esp_err_to_name(err));
+        http_cleanup(client);
+
+        return false;
+    }
+
+    ESP_LOGI(TAG, "End of OTA procedure!");
+
+    return true;
+}

esp32_device/main/ota.h

@@ -0,0 +1,24 @@
+/**
+ * OTA functions
+ */
+
+#pragma once
+
+#include <stddef.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /**
+     * Update device to a desired version
+     *
+     * Returns TRUE in case of success / FALSE otherwise
+     */
+    bool ota_perform_update(const char *version);
+
+#ifdef __cplusplus
+}
+#endif

esp32_device/main/relays.c

@@ -0,0 +1,63 @@
+#include <driver/gpio.h>
+#include "esp_log.h"
+
+#include "relays.h"
+#include "constants.h"
+
+static const char *TAG = "relays";
+
+/**
+ * Device relays GPIO ids
+ */
+static int DEVICE_GPIO_IDS[3] = {4, 14, 15};
+
+int relays_count()
+{
+    return sizeof(DEVICE_GPIO_IDS) / sizeof(int);
+}
+
+void relays_setup()
+{
+    int pin_bit_mask = 0;
+    for (size_t i = 0; i < relays_count(); i++)
+    {
+        pin_bit_mask |= 1ULL << DEVICE_GPIO_IDS[i];
+    }
+
+    // zero-initialize the config structure.
+    gpio_config_t io_conf = {};
+    // disable interrupt
+    io_conf.intr_type = GPIO_INTR_DISABLE;
+    // set as output mode
+    io_conf.mode = GPIO_MODE_OUTPUT;
+    // bit mask of the pins that you want to set,e.g.GPIO18/19
+    io_conf.pin_bit_mask = pin_bit_mask;
+    // disable pull-down mode
+    io_conf.pull_down_en = 0;
+    // disable pull-up mode
+    io_conf.pull_up_en = 0;
+    // configure GPIO with the given settings
+    gpio_config(&io_conf);
+}
+
+void relays_turn_off_all()
+{
+    ESP_LOGI(TAG, "Turning off all relays...");
+
+    for (size_t i = 0; i < relays_count(); i++)
+    {
+        relays_set(i, false);
+    }
+}
+
+void relays_set(int number, bool is_on)
+{
+    size_t gpio_id = DEVICE_GPIO_IDS[number];
+    ESP_LOGI(TAG, "Set relay %d (gpio %d) to %s", number, gpio_id, is_on ? "on" : "off");
+
+    int res = gpio_set_level(gpio_id, is_on ? 0 : 1);
+    if (res != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to toggle GPIO %d : %d", gpio_id, res);
+    }
+}

esp32_device/main/relays.h

@@ -0,0 +1,36 @@
+/**
+ * Relays management
+ */
+
+#pragma once
+
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /**
+     * Get the max number of relays
+     */
+    int relays_count();
+
+    /**
+     * Configure the relays
+     */
+    void relays_setup();
+
+    /**
+     * Turn off all relays
+     */
+    void relays_turn_off_all();
+
+    /**
+     * Turn on / off a relay
+     */
+    void relays_set(int number, bool is_on);
+
+#ifdef __cplusplus
+}
+#endif

esp32_device/main/secure_api.c

@@ -11,8 +11,10 @@
 #include "storage.h"
 #include "http_client.h"
 #include "jwt.h"
+#include "relays.h"
 
 #include "esp_log.h"
+#include "esp_app_desc.h"
 
 static const char *TAG = "secure_api";
 
@@ -117,12 +119,14 @@ fail:
  */
 static cJSON *genDevInfo()
 {
+    const esp_app_desc_t *desc = esp_app_get_description();
+
     cJSON *json = cJSON_CreateObject();
     if (!json)
         return NULL;
     cJSON_AddStringToObject(json, "reference", DEV_REFERENCE);
-    cJSON_AddStringToObject(json, "version", DEV_VERSION);
-    cJSON_AddNumberToObject(json, "max_relays", DEV_MAX_RELAYS);
+    cJSON_AddStringToObject(json, "version", desc->version);
+    cJSON_AddNumberToObject(json, "max_relays", relays_count());
     return json;
 }
 
@@ -148,16 +152,16 @@ int secure_api_enroll_device()
     free(csr);
 
     char *body = cJSON_PrintUnformatted(obj);
+    cJSON_Delete(obj);
+
     if (!body)
     {
         ESP_LOGE(TAG, "Failed to generate JSON body!");
-        cJSON_Delete(obj);
         return 1;
     }
 
     char *res = process_secure_request("/devices_api/mgmt/enroll", body);
 
-    cJSON_Delete(obj);
     free(body);
 
     if (res == NULL)
@@ -195,7 +199,78 @@ char *secure_api_get_dev_certificate()
     return res;
 }
 
-void *secure_api_sync_device()
+void secure_api_report_log_message(enum LogMessageSeverity severity, const char *msg)
+{
+    // Prepare signed payload
+    cJSON *obj = cJSON_CreateObject();
+    if (!obj)
+    {
+        ESP_LOGE(TAG, "Failed allocate memory to store JSON object!");
+        return;
+    }
+
+    char *severity_s;
+    switch (severity)
+    {
+    case Info:
+        severity_s = "Info";
+        break;
+    case Warn:
+        severity_s = "Warn";
+        break;
+    case Error:
+        severity_s = "Error";
+        break;
+    default:
+        severity_s = "Debug";
+        break;
+    }
+
+    cJSON_AddStringToObject(obj, "severity", severity_s);
+    cJSON_AddStringToObject(obj, "message", msg);
+    char *payload = jwt_gen(obj);
+    cJSON_Delete(obj);
+
+    if (!payload)
+    {
+        ESP_LOGE(TAG, "Failed to build log report request!");
+        return;
+    }
+
+    // Prepare request body
+    cJSON *json_body = cJSON_CreateObject();
+    if (!json_body)
+    {
+        ESP_LOGE(TAG, "Failed to allocated memory to store log report request body!");
+        free(payload);
+        return;
+    }
+    cJSON_AddStringToObject(json_body, "payload", payload);
+    free(payload);
+
+    char *body = cJSON_PrintUnformatted(json_body);
+    cJSON_Delete(json_body);
+
+    if (!body)
+    {
+        ESP_LOGE(TAG, "Failed to allocated memory to store encoded log report request body!");
+        return;
+    }
+
+    // Send request
+    char *res = process_secure_request("/devices_api/logging/record", body);
+
+    free(body);
+
+    if (!res)
+    {
+        ESP_LOGE(TAG, "Log reporting failed!");
+    }
+
+    free(res);
+}
+
+sync_response *secure_api_sync_device()
 {
     cJSON *obj = cJSON_CreateObject();
     if (!obj)
@@ -215,10 +290,54 @@ void *secure_api_sync_device()
         return NULL;
     }
 
-    printf("JWT: %s\n", encoded_req);
+    // Prepare request body
+    cJSON *json_body = cJSON_CreateObject();
+    if (!json_body)
+    {
+        ESP_LOGE(TAG, "Failed to allocated memory to store sync request body!");
+        free(encoded_req);
+        return NULL;
+    }
+    cJSON_AddStringToObject(json_body, "payload", encoded_req);
     free(encoded_req);
 
-    // TODO : replace
-    printf("here implement sync device logic\n");
+    char *body = cJSON_PrintUnformatted(json_body);
+    cJSON_Delete(json_body);
+
+    if (!body)
+    {
+        ESP_LOGE(TAG, "Failed to allocated memory to store encoded sync request body!");
         return NULL;
+    }
+
+    // Send request
+    char *res = process_secure_request("/devices_api/mgmt/sync", body);
+    free(body);
+    if (res == NULL)
+    {
+        ESP_LOGE(TAG, "Sync request failed!");
+        return NULL;
+    }
+
+    // Parse response
+    cJSON *states = cJSON_Parse(res);
+    free(res);
+
+    if (!states)
+    {
+        ESP_LOGE(TAG, "Failed to decode sync response from server!");
+        return NULL;
+    }
+
+    sync_response *sync_res = sync_response_parse(states);
+
+    cJSON_Delete(states);
+
+    if (!sync_res)
+    {
+        ESP_LOGE(TAG, "Failed to parse sync response from server!");
+        return NULL;
+    }
+
+    return sync_res;
 }

esp32_device/main/secure_api.h

@@ -2,6 +2,11 @@
  * Secure API functions
  */
 
+#include <stddef.h>
+#include <stdbool.h>
+
+#include "sync_response.h"
+
 #pragma once
 
 #ifdef __cplusplus
@@ -24,6 +29,17 @@ extern "C"
         DevEnrollValidated = 3,
     };
 
+    /**
+     * Log message severity
+     */
+    enum LogMessageSeverity
+    {
+        Debug = 0,
+        Info,
+        Warn,
+        Error
+    };
+
     /**
      * Get current device enrollment status
      */
@@ -40,12 +56,17 @@ extern "C"
      */
     char *secure_api_get_dev_certificate();
 
+    /**
+     * Report log message to backend
+     */
+    void secure_api_report_log_message(enum LogMessageSeverity severity, const char *msg);
+
     /**
      * Synchronise device with central backend
      *
      * Returns NULL in case of failure
      */
-    void *secure_api_sync_device();
+    sync_response *secure_api_sync_device();
 
 #ifdef __cplusplus
 }

esp32_device/main/storage.c

@@ -20,7 +20,7 @@ bool storage_init()
     esp_err_t err = nvs_flash_init();
     if (err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND)
     {
-        ESP_LOGI(TAG, "Need to reset storage\n");
+        ESP_LOGI(TAG, "Need to reset storage");
 
         // NVS partition was truncated and needs to be erased
         // Retry nvs_flash_init

esp32_device/main/sync_response.c

@@ -0,0 +1,96 @@
+#include "sync_response.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <esp_log.h>
+
+const static char *TAG = "sync_response";
+
+sync_response *sync_response_parse(cJSON *res)
+{
+    // Parse relays information
+    cJSON *relays_json = cJSON_GetObjectItem(res, "relays");
+    if (relays_json == NULL)
+    {
+        ESP_LOGE(TAG, "Missing relays status in sync response!");
+        return NULL;
+    }
+
+    int relays_size = cJSON_GetArraySize(relays_json);
+    sync_response *sync_res = calloc(1, sizeof(sync_response) + relays_size * sizeof(bool));
+
+    if (!sync_res)
+    {
+        ESP_LOGE(TAG, "Failed to allocate memory to store synchronization response!");
+        return NULL;
+    }
+
+    sync_res->len = relays_size;
+
+    for (int i = 0; i < sync_res->len; i++)
+    {
+        sync_res->relays[i] = false;
+
+        cJSON *item = cJSON_GetArrayItem(relays_json, i);
+        assert(item != NULL);
+        cJSON *enabled = cJSON_GetObjectItem(item, "enabled");
+
+        if (enabled == NULL)
+        {
+            ESP_LOGE(TAG, "At least a relay is missing the enabled field. Assuming false.");
+            continue;
+        }
+
+        if (cJSON_IsTrue(enabled))
+        {
+            sync_res->relays[i] = true;
+        }
+    }
+
+    // Parse firmware update information
+    cJSON *update = cJSON_GetObjectItem(res, "available_update");
+    if (update != NULL)
+    {
+        char *val = cJSON_GetStringValue(update);
+        sync_res->available_update = val != NULL ? strdup(val) : NULL;
+    }
+
+    return sync_res;
+}
+
+void sync_response_print(sync_response *res)
+{
+    ESP_LOGI(TAG, " === sync response begin === ");
+
+    if (res->available_update != NULL)
+    {
+        ESP_LOGI(TAG, "> AVAILABLE UPDATE! Version %s", res->available_update);
+    }
+
+    ESP_LOGI(TAG, "# of relays: %d", res->len);
+    for (size_t i = 0; i < res->len; i++)
+        ESP_LOGI(TAG, "Relay[%d]=%s", i, res->relays[i] ? "ON" : "off");
+    ESP_LOGI(TAG, " === sync response end === ");
+}
+
+void sync_response_free(sync_response *res)
+{
+    if (res == NULL)
+        return;
+
+    if (res->available_update != NULL)
+        free(res->available_update);
+
+    free(res);
+}
+
+bool sync_response_is_relay_on(sync_response *res, int relay_number)
+{
+    if (res->len <= relay_number)
+    {
+        ESP_LOGW(TAG, "Requested state of an unconfigured relay (%d). Defaulting to off.", relay_number);
+        return false;
+    }
+
+    return res->relays[relay_number];
+}

esp32_device/main/sync_response.h

@@ -0,0 +1,45 @@
+/**
+ * Synchronisation response
+ */
+
+#pragma once
+
+#include <stddef.h>
+#include <stdbool.h>
+#include <cJSON.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    typedef struct sync_response
+    {
+        size_t len;
+        char *available_update;
+        bool relays[];
+    } sync_response;
+
+    /**
+     * Decode synchronize response from server
+     */
+    sync_response *sync_response_parse(cJSON *res);
+
+    /**
+     * Print synchronize reponse content
+     */
+    void sync_response_print(sync_response *res);
+
+    /**
+     * Free memory allocated for synchronize response
+     */
+    void sync_response_free(sync_response *res);
+
+    /**
+     * Check the desired status of a relay
+     */
+    bool sync_response_is_relay_on(sync_response *res, int relay_number);
+
+#ifdef __cplusplus
+}
+#endif