Better firmware module support for devices not connected to the internet (#854)

Devices not connected to the internet will either error when querying
firmware queries (e.g. P300) or return misleading information (e.g.
P100). This PR adds the cloud connect query to the initial queries and
bypasses the firmware module if not connected.

kasa/smart/modules/cloudmodule.py

@@ -4,6 +4,7 @@ from __future__ import annotations
 
 from typing import TYPE_CHECKING
 
+from ...exceptions import SmartErrorCode
 from ...feature import Feature, FeatureType
 from ..smartmodule import SmartModule
 
@@ -34,4 +35,6 @@ class CloudModule(SmartModule):
     @property
     def is_connected(self):
         """Return True if device is connected to the cloud."""
+        if isinstance(self.data, SmartErrorCode):
+            return False
         return self.data["status"] == 0

kasa/smart/modules/firmware.py

@@ -2,7 +2,7 @@
 
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Optional
+from typing import TYPE_CHECKING, Any, Optional
 
 from ...exceptions import SmartErrorCode
 from ...feature import Feature, FeatureType
@@ -74,9 +74,7 @@ class Firmware(SmartModule):
 
     def query(self) -> dict:
         """Query to execute during the update cycle."""
-        req = {
-            "get_latest_fw": None,
-        }
+        req: dict[str, Any] = {"get_latest_fw": None}
         if self.supported_version > 1:
             req["get_auto_update_info"] = None
         return req
@@ -85,15 +83,17 @@ class Firmware(SmartModule):
     def latest_firmware(self):
         """Return latest firmware information."""
         fw = self.data.get("get_latest_fw") or self.data
-        if isinstance(fw, SmartErrorCode):
+        if not self._device.is_cloud_connected or isinstance(fw, SmartErrorCode):
             # Error in response, probably disconnected from the cloud.
             return UpdateInfo(type=0, need_to_upgrade=False)
 
         return UpdateInfo.parse_obj(fw)
 
     @property
-    def update_available(self):
+    def update_available(self) -> bool | None:
         """Return True if update is available."""
+        if not self._device.is_cloud_connected:
+            return None
         return self.latest_firmware.update_available
 
     async def get_update_state(self):