added availability check to battery sensor

custom_components/bluetti_bt/__init__.py

@@ -5,10 +5,12 @@ from __future__ import annotations
 import re
 import logging
 
+from homeassistant.components import bluetooth
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import CONF_ADDRESS, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity import DeviceInfo
+from homeassistant.exceptions import ConfigEntryNotReady
 
 from .const import DOMAIN, MANUFACTURER
 
@@ -24,6 +26,9 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     if address is None:
         return False
 
+    if not bluetooth.async_address_present(hass, address):
+        raise ConfigEntryNotReady("Bluetti device not present")
+
     # Setup platforms
     await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)