Migrate properties to instance variables in NAM coordinator (#116703)

* Migrate properties to instance variables

* Fix unique_id type

* Update homeassistant/components/nam/__init__.py

Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

---------

Co-authored-by: Maciej Bieniek <478555+bieniu@users.noreply.github.com>
Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>

homeassistant/components/nam/__init__.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import logging
+from typing import TYPE_CHECKING
 
 from aiohttp.client_exceptions import ClientConnectorError, ClientError
 from nettigo_air_monitor import (
@@ -51,6 +52,9 @@ async def async_setup_entry(hass: HomeAssistant, entry: NAMConfigEntry) -> bool:
     except AuthFailedError as err:
         raise ConfigEntryAuthFailed from err
 
+    if TYPE_CHECKING:
+        assert entry.unique_id
+
     coordinator = NAMDataUpdateCoordinator(hass, nam, entry.unique_id)
     await coordinator.async_config_entry_first_refresh()
 

homeassistant/components/nam/coordinator.py

@@ -2,7 +2,6 @@
 
 import asyncio
 import logging
-from typing import cast
 
 from aiohttp.client_exceptions import ClientConnectorError
 from nettigo_air_monitor import (
@@ -28,10 +27,17 @@ class NAMDataUpdateCoordinator(DataUpdateCoordinator[NAMSensors]):
         self,
         hass: HomeAssistant,
         nam: NettigoAirMonitor,
-        unique_id: str | None,
+        unique_id: str,
     ) -> None:
         """Initialize."""
-        self._unique_id = unique_id
+        self.unique_id = unique_id
+        self.device_info = DeviceInfo(
+            connections={(CONNECTION_NETWORK_MAC, unique_id)},
+            name="Nettigo Air Monitor",
+            sw_version=nam.software_version,
+            manufacturer=MANUFACTURER,
+            configuration_url=f"http://{nam.host}/",
+        )
         self.nam = nam
 
         super().__init__(
@@ -49,19 +55,3 @@ class NAMDataUpdateCoordinator(DataUpdateCoordinator[NAMSensors]):
             raise UpdateFailed(error) from error
 
         return data
-
-    @property
-    def unique_id(self) -> str | None:
-        """Return a unique_id."""
-        return self._unique_id
-
-    @property
-    def device_info(self) -> DeviceInfo:
-        """Return the device info."""
-        return DeviceInfo(
-            connections={(CONNECTION_NETWORK_MAC, cast(str, self._unique_id))},
-            name="Nettigo Air Monitor",
-            sw_version=self.nam.software_version,
-            manufacturer=MANUFACTURER,
-            configuration_url=f"http://{self.nam.host}/",
-        )