code cleanup

custom_components/bluetti_bt/sensor.py

@@ -129,7 +129,7 @@ class BluettiSensor(CoordinatorEntity, SensorEntity):
     def _handle_coordinator_update(self) -> None:
         """Handle updated data from the coordinator."""
 
-        if self.coordinator.persistent_conn and not self.coordinator.client.is_connected:
+        if self.coordinator.reader.persistent_conn and not self.coordinator.reader.client.is_connected:
             return
 
         if self.coordinator.data is None: