Consider missing togrill device okey to log real errors (#161544)

homeassistant/components/togrill/coordinator.py

@@ -144,14 +144,15 @@ class ToGrillCoordinator(DataUpdateCoordinator[dict[tuple[int, int | None], Pack
             )
         except BleakError as exc:
             self.logger.debug("Connection failed", exc_info=True)
-            raise DeviceNotFound("Unable to connect to device") from exc
+            raise DeviceFailed("Unable to connect to device") from exc
 
         try:
             async with asyncio.timeout(10):
                 packet_a0 = await client.read(PacketA0Notify)
         except (BleakError, DecodeError, TimeoutError) as exc:
+            self.logger.debug("Configuration read failed", exc_info=True)
             await client.disconnect()
-            raise DeviceFailed(f"Device failed {exc}") from exc
+            raise DeviceFailed("Failed to read device configuration") from exc
 
         config_entry = self.config_entry
 
@@ -202,7 +203,11 @@ class ToGrillCoordinator(DataUpdateCoordinator[dict[tuple[int, int | None], Pack
             self._debounced_refresh.async_schedule_call()
             raise DeviceFailed("Device was disconnected")
 
-        client = await self._get_connected_client()
+        try:
+            client = await self._get_connected_client()
+        except DeviceNotFound:
+            return {}
+
         try:
             await client.request(PacketA0Notify)
             await client.request(PacketA1Notify)
@@ -224,5 +229,5 @@ class ToGrillCoordinator(DataUpdateCoordinator[dict[tuple[int, int | None], Pack
         change: BluetoothChange,
     ) -> None:
         """Handle a Bluetooth event."""
-        if isinstance(self.last_exception, DeviceNotFound):
+        if self.client is None:
             self._debounced_refresh.async_schedule_call()

homeassistant/components/togrill/entity.py

@@ -49,3 +49,10 @@ class ToGrillEntity(CoordinatorEntity[ToGrillCoordinator]):
                 translation_domain=DOMAIN, translation_key="rejected"
             ) from exc
         await self.coordinator.async_request_refresh()
+
+    @property
+    def available(self) -> bool:
+        """Return if entity is available."""
+        return (
+            self.coordinator.last_update_success and self.coordinator.client is not None
+        )