fix: improve MQTT connection handling in JackeryHome sensor

- Added a delay at startup to ensure MQTT connection is established before sending data requests.
- Implemented error handling for MQTT connection issues, logging warnings and continuing the periodic data request process.
- Enhanced logging for task cancellation to provide clearer feedback on sensor operation.

custom_components/JackeryHome/sensor.py

@@ -418,6 +418,10 @@ class JackeryHomeSensor(SensorEntity):
     
     async def _periodic_data_request(self) -> None:
         """Periodically send data request to device/data-get topic."""
+        # 启动时等待一段时间，确保 MQTT 连接已建立
+        _LOGGER.info(f"Starting periodic data request for {self._sensor_id}, waiting for MQTT connection...")
+        await asyncio.sleep(2)
+        
         while True:
             try:
                 # 如果还没有设备序列号，等待一段时间再重试
@@ -428,6 +432,8 @@ class JackeryHomeSensor(SensorEntity):
                     await asyncio.sleep(REQUEST_INTERVAL)
                     continue
                 
+                # 检查 MQTT 是否可用
+                try:
                     # 构造并发送 data_get 格式的请求
                     request_data = self._construct_data_get_request()
                     await ha_mqtt.async_publish(
@@ -441,11 +447,21 @@ class JackeryHomeSensor(SensorEntity):
                         f"Sent data_get request for {self._sensor_id} "
                         f"(meter_sn: {self._meter_sn}) to {self._data_get_topic}"
                     )
+                except Exception as mqtt_error:
+                    # MQTT 连接错误，记录警告但继续运行
+                    _LOGGER.warning(
+                        f"MQTT not ready for {self._sensor_id}: {mqtt_error}. "
+                        f"Will retry in {REQUEST_INTERVAL} seconds..."
+                    )
                 
                 await asyncio.sleep(REQUEST_INTERVAL)
                 
+            except asyncio.CancelledError:
+                # 任务被取消时正常退出
+                _LOGGER.info(f"Periodic data request task cancelled for {self._sensor_id}")
+                raise
             except Exception as e:
-                _LOGGER.error(f"Error in periodic data request for {self._sensor_id}: {e}")
+                _LOGGER.error(f"Unexpected error in periodic data request for {self._sensor_id}: {e}")
                 await asyncio.sleep(REQUEST_INTERVAL)
 
     async def async_will_remove_from_hass(self) -> None: