Revert watchdog back to once every 7.5 minutes (#239)

* Revert watchdog back to once every 7.5 minutes

* Ensure unit tests reflect commands that are now sent

tests/test_application.py

@@ -337,7 +337,7 @@ async def test_reset_watchdog(app):
     app._api.write_parameter = AsyncMock()
 
     await app._watchdog_feed()
-    assert len(app._api.get_device_state.mock_calls) == 1
+    assert len(app._api.get_device_state.mock_calls) == 0
     assert len(app._api.write_parameter.mock_calls) == 1
 
     app._api.protocol_version = application.PROTO_VER_WATCHDOG - 1

zigpy_deconz/zigbee/application.py

@@ -64,6 +64,8 @@ class ControllerApplication(zigpy.application.ControllerApplication):
         {zigpy.config.CONF_DEVICE_BAUDRATE: 115200},
     ]
 
+    _watchdog_period = 600 * 0.75
+
     def __init__(self, config: dict[str, Any]):
         """Initialize instance."""
 
@@ -78,15 +80,15 @@ def __init__(self, config: dict[str, Any]):
         self._written_endpoints = set()
 
     async def _watchdog_feed(self):
-        await self._api.get_device_state()
-
         if self._api.protocol_version >= PROTO_VER_WATCHDOG and not (
             self._api.firmware_version.platform == FirmwarePlatform.Conbee_III
             and self._api.firmware_version <= 0x26450900
         ):
             await self._api.write_parameter(
-                NetworkParameter.watchdog_ttl, int(2 * self._watchdog_period)
+                NetworkParameter.watchdog_ttl, int(self._watchdog_period / 0.75)
             )
+        else:
+            await self._api.get_device_state()
 
     async def connect(self):
         api = Deconz(self, self._config[zigpy.config.CONF_DEVICE])