fix: improve MQTT topic resubscription and error handling in JackeryHome sensor

- Refactored the error handling logic to use an asynchronous function for resubscribing to MQTT topics after an error occurs.
- Added detailed logging for LWT message processing and device serial number updates.
- Ensured that the periodic data request task is initiated after resubscribing to the necessary topics.

custom_components/jackery_home/sensor.py

@@ -336,6 +336,31 @@ def data_message_received(msg):
 
     except Exception as e:
         _LOGGER.error(f"Error processing data message for {self._sensor_id}: {e}")
+        # 在回调函数中不能直接使用 await，需要通过 async_create_task 执行异步操作
+        async def _resubscribe_topics():
+            """重新订阅 MQTT 主题的异步函数"""
+            # 定义 LWT 消息处理回调
+            @callback
+            def lwt_message_received(msg):
+                """Handle LWT messages to get device serial number."""
+                try:
+                    payload = msg.payload
+                    if isinstance(payload, bytes):
+                        payload = payload.decode("utf-8")
+                    
+                    _LOGGER.debug(f"Received LWT message: {payload}")
+                    
+                    try:
+                        data = json.loads(payload)
+                        if isinstance(data, dict) and "gw_sn" in data:
+                            self._device_sn = data["gw_sn"]
+                            _LOGGER.info(f"Device serial number updated: {self._device_sn}")
+                    except json.JSONDecodeError:
+                        _LOGGER.warning(f"Failed to parse LWT message: {payload}")
+                        
+                except Exception as e:
+                    _LOGGER.error(f"Error processing LWT message: {e}")
+            
             # 订阅 LWT topic 以获取设备序列号
             await ha_mqtt.async_subscribe(
                 self.hass,
@@ -358,6 +383,8 @@ def data_message_received(msg):
             # 启动定时器，每隔5秒向 device/data-get 发送数据获取请求
             self._data_task = asyncio.create_task(self._periodic_data_request())
         
+        self.hass.async_create_task(_resubscribe_topics())
+        
 
     def _construct_data_get_request(self) -> dict:
         """构造 data_get 格式的请求数据."""