rust/src/hal/initial_hal.rs

@@ -32,7 +32,7 @@ pub(crate) fn create_initial_board(
         general_fault,
         config,
         esp,
-        battery: Box::new(NoBatteryMonitor{}),
+        battery: Box::new(NoBatteryMonitor {}),
     };
     Ok(Box::new(v))
 }

rust/src/hal/mod.rs

@@ -281,8 +281,9 @@ impl PlantHal {
 
         let hal = match config {
             Result::Ok(config) => {
-                let battery_interaction: Box<dyn BatteryInteraction + Send> = match config.hardware.battery {
-                    BatteryBoardVersion::Disabled => Box::new(NoBatteryMonitor{}),
+                let battery_interaction: Box<dyn BatteryInteraction + Send> =
+                    match config.hardware.battery {
+                        BatteryBoardVersion::Disabled => Box::new(NoBatteryMonitor {}),
                         BatteryBoardVersion::BQ34Z100G1 => {
                             let mut battery_driver = Bq34z100g1Driver {
                                 i2c: MutexDevice::new(&I2C_DRIVER),
@@ -306,8 +307,8 @@ impl PlantHal {
                         }
                         BatteryBoardVersion::WchI2cSlave => {
                             // TODO use correct implementation once availible
-                        Box::new(NoBatteryMonitor{})
-                    },
+                            Box::new(NoBatteryMonitor {})
+                        }
                     };
 
                 let board_hal: Box<dyn BoardInteraction + Send> = match config.hardware.board {

rust/src/main.rs

@@ -12,6 +12,7 @@ use esp_idf_sys::{
     esp_ota_img_states_t_ESP_OTA_IMG_VALID, vTaskDelay,
 };
 use esp_ota::{mark_app_valid, rollback_and_reboot};
+use hal::battery::BatteryState;
 use log::{log, LogMessage};
 use once_cell::sync::Lazy;
 use serde::{Deserialize, Serialize};
@@ -421,7 +422,14 @@ fn safe_main() -> anyhow::Result<()> {
         .board_hal
         .get_battery_monitor()
         .state_charge_percent()
-        .unwrap_or(0);
+        .unwrap_or(0.);
+
+    /// try to load full battery state if failed the battery state is unknown
+    let battery_state = board
+        .board_hal
+        .get_battery_monitor()
+        .get_battery_state()
+        .unwrap_or(hal::battery::BatteryState::Unknown);
 
     let mut light_state = LightState {
         enabled: board.board_hal.get_config().night_lamp.enabled,
@@ -439,9 +447,23 @@ fn safe_main() -> anyhow::Result<()> {
             board.board_hal.get_config().night_lamp.night_lamp_hour_end,
         );
 
-        if state_of_charge < board.board_hal.get_config().night_lamp.low_soc_cutoff {
+        if state_of_charge
+            < board
+                .board_hal
+                .get_config()
+                .night_lamp
+                .low_soc_cutoff
+                .into()
+        {
             board.board_hal.get_esp().set_low_voltage_in_cycle();
-        } else if state_of_charge > board.board_hal.get_config().night_lamp.low_soc_restore {
+        } else if state_of_charge
+            > board
+                .board_hal
+                .get_config()
+                .night_lamp
+                .low_soc_restore
+                .into()
+        {
             board.board_hal.get_esp().clear_low_voltage_in_cycle();
         }
         light_state.battery_low = board.board_hal.get_esp().low_voltage_in_cycle();
@@ -487,7 +509,9 @@ fn safe_main() -> anyhow::Result<()> {
         }
     };
 
-    let deep_sleep_duration_minutes: u32 = if state_of_charge < 10 {
+    let deep_sleep_duration_minutes: u32 =
+        // if battery soc is unknown assume battery has enough change
+        if state_of_charge < 10.0 && !matches!(battery_state, BatteryState::Unknown) {
             let _ = board
                 .board_hal
                 .get_esp()
@@ -715,10 +739,13 @@ fn pump_info(
 
 fn publish_battery_state(board: &mut MutexGuard<'_, HAL<'_>>) {
     let state = board.board_hal.get_battery_monitor().get_battery_state();
+    if let Ok(serialized_battery_state_bytes) = serde_json::to_string(&state).map(|s| s.into_bytes())
+    {
         let _ = board
             .board_hal
             .get_esp()
-        .mqtt_publish("/battery", state.as_bytes());
+            .mqtt_publish("/battery", &serialized_battery_state_bytes);
+    }
 }
 
 fn wait_infinity(wait_type: WaitType, reboot_now: Arc<AtomicBool>) -> ! {

rust/src/webserver/webserver.rs

@@ -223,7 +223,7 @@ fn get_battery_state(
 ) -> Result<Option<std::string::String>, anyhow::Error> {
     let mut board = BOARD_ACCESS.lock().expect("board access");
     let battery_state = board.board_hal.get_battery_monitor().get_battery_state();
-    anyhow::Ok(Some(battery_state))
+    anyhow::Ok(Some(serde_json::to_string(&battery_state)?))
 }
 
 fn get_log(