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esp_err_t save_struct(Settings_t Settings)
{
    nvs_handle_t my_handle;
    esp_err_t err;

    err = nvs_open(STORAGE_NAMESPACE, NVS_READWRITE, &my_handle);
    if (err != ESP_OK) return err;

    err = nvs_set_blob(my_handle, "Settings", &Settings, sizeof(Settings));
    if (err != ESP_OK) return err;

    err = nvs_commit(my_handle);
    if (err != ESP_OK) return err;

    nvs_close(my_handle);
    return ESP_OK;
}

esp_err_t load_struct(Settings_t *Settings)
{
    nvs_handle_t my_handle;
    esp_err_t err;

    err = nvs_open(STORAGE_NAMESPACE, NVS_READWRITE, &my_handle);
    if (err != ESP_OK) return err;

    size_t required_size = sizeof(Settings_t);
    err = nvs_get_blob(my_handle, "Settings", Settings, &required_size);
    if (err != ESP_OK && err != ESP_ERR_NVS_NOT_FOUND) return err;

    nvs_close(my_handle);
    return ESP_OK;
}

Code: Select all

void save_settings(void)
{
    esp_err_t err = nvs_flash_init();
    if (err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND) {
        ESP_ERROR_CHECK(nvs_flash_erase());
        err = nvs_flash_init();
    }
    ESP_ERROR_CHECK( err );
    printf("In Saving \n");

    Settings_t Settings = {0};
    err = load_struct(&Settings);
    if (err == ESP_ERR_NVS_NOT_FOUND) {
        Settings.var1= 15;
        Settings.var2= 5;
    } else if (err != ESP_OK) {
        // Handle error
    }

    // vTaskDelay(pdMS_TO_TICKS(2000));


    printf("var1 = %d\n", Settings.var1);
    printf("var2 = %d\n", Settings.var2);
    err = save_struct(Settings);
    if (err != ESP_OK) {
        // Handle error
    }
}

Code: Select all

void messageReceived(const uint8_t* message, size_t length, ttn_port_t port)
{
    printf("Message of %d bytes received on port %d:", length, port);
        Settings.var1= message[1];
        printf("var1%d\n", Settings.var1);
        Settings.var2= message[2];
        save_settings();
        printf("After Saving \n");
}

Code: Select all

typedef struct {
    int var1;
    int var2;
} Settings_t;

extern Settings_t Settings;