SolarEnergy/esp32_device/main/storage.c

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2024-07-27 13:31:17 +00:00
#include "constants.h"
#include "storage.h"
#include "nvs_flash.h"
#include "nvs.h"
#include <string.h>
#define STORAGE_NAMESPACE "storage"
#define DEV_NAME_KEY "dev_name"
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)
{
printf("Need to reset storage\n");
// NVS partition was truncated and needs to be erased
// Retry nvs_flash_init
ESP_ERROR_CHECK(nvs_flash_erase());
err = nvs_flash_init();
}
return err == ESP_OK;
}
void storage_set_dev_name(const char *name)
{
nvs_handle_t my_handle;
ESP_ERROR_CHECK(nvs_open(STORAGE_NAMESPACE, NVS_READWRITE, &my_handle));
ESP_ERROR_CHECK(nvs_set_blob(my_handle, DEV_NAME_KEY, name, strlen(name)));
nvs_close(my_handle);
}
size_t storage_get_dev_name(char *dest)
{
nvs_handle_t my_handle;
ESP_ERROR_CHECK(nvs_open(STORAGE_NAMESPACE, NVS_READWRITE, &my_handle));
size_t len = (dest == NULL ? 0 : DEV_NAME_LEN);
esp_err_t res = nvs_get_blob(my_handle, DEV_NAME_KEY, dest, &len);
nvs_close(my_handle);
if (res == ESP_ERR_NVS_NOT_FOUND || len == 0)
return 0;
ESP_ERROR_CHECK(res);
return len;
}