Can get consumption on Fronius inverter

central_backend/src/app_config.rs

@@ -35,6 +35,13 @@ 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 reacher
+        #[clap(short, long)]
+        origin: String,
+    },
 }
 
 /// Solar system central backend

central_backend/src/energy/consumption.rs

@@ -13,6 +13,30 @@ pub enum ConsumptionError {
 
 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 +62,12 @@ pub async fn get_curr_consumption() -> anyhow::Result<EnergyConsumption> {
                 .parse()
                 .map_err(ConsumptionError::FileInvalidContent)?)
         }
+
+        ConsumptionBackend::Fronius { origin } => {
+            let url = format!("{origin}/solar_api/v1/GetPowerFlowRealtimeData.fcgi");
+            let response = reqwest::get(url).await?.json::<FroniusResponse>().await?;
+
+            Ok(response.body.data.site.grid_production as i32)
+        }
     }
 }