Huawei LTE device registry improvements (#38925)

* Fix getting software version in unauthenticated mode

* Add serial number device identifier if available

homeassistant/components/huawei_lte/__init__.py

@@ -162,6 +162,14 @@ class Router:
                 pass
         return DEFAULT_DEVICE_NAME
 
+    @property
+    def device_identifiers(self) -> Set[Tuple[str, str]]:
+        """Get router identifiers for device registry."""
+        try:
+            return {(DOMAIN, self.data[KEY_DEVICE_INFORMATION]["SerialNumber"])}
+        except (KeyError, TypeError):
+            return set()
+
     @property
     def device_connections(self) -> Set[Tuple[str, str]]:
         """Get router connections for device registry."""
@@ -390,6 +398,7 @@ async def async_setup_entry(hass: HomeAssistantType, config_entry: ConfigEntry)
     device_registry.async_get_or_create(
         config_entry_id=config_entry.entry_id,
         connections=router.device_connections,
+        identifiers=router.device_identifiers,
         name=router.device_name,
         manufacturer="Huawei",
         **device_data,
@@ -594,7 +603,10 @@ class HuaweiLteBaseEntity(Entity):
     @property
     def device_info(self) -> Dict[str, Any]:
         """Get info for matching with parent router."""
-        return {"connections": self.router.device_connections}
+        return {
+            "identifiers": self.router.device_identifiers,
+            "connections": self.router.device_connections,
+        }
 
     async def async_update(self) -> None:
         """Update state."""

homeassistant/components/huawei_lte/const.py

@@ -53,4 +53,10 @@ SENSOR_KEYS = {
 
 SWITCH_KEYS = {KEY_DIALUP_MOBILE_DATASWITCH}
 
-ALL_KEYS = BINARY_SENSOR_KEYS | DEVICE_TRACKER_KEYS | SENSOR_KEYS | SWITCH_KEYS
+ALL_KEYS = (
+    BINARY_SENSOR_KEYS
+    | DEVICE_TRACKER_KEYS
+    | SENSOR_KEYS
+    | SWITCH_KEYS
+    | {KEY_DEVICE_BASIC_INFORMATION}
+)