Require libs to implement probe method.

ControllerApplication.probe() method receives SCHEMA_DEVICE as config
and should return True if radio was successfuly detected or False
otherwise.

tests/test_appdb.py

@@ -39,6 +39,9 @@ async def request(
         async def permit_ncp(self, time_s=60):
             pass
 
+        async def probe(self, config):
+            return True
+
     with mock.patch("zigpy.ota.OTA.initialize", CoroutineMock()):
         app = await App.new(ZIGPY_SCHEMA({CONF_DATABASE: database_file}))
     return app

tests/test_application.py

@@ -39,6 +39,9 @@ async def request(
         async def permit_ncp(self, time_s=60):
             pass
 
+        async def probe(self, config):
+            return True
+
     return App({CONF_DATABASE: None})
 
 
@@ -99,6 +102,9 @@ async def request(
         async def permit_ncp(self, time_s=60):
             pass
 
+        async def probe(self, config):
+            return True
+
     p1 = mock.patch.object(App, "_load_db", CoroutineMock())
     p2 = mock.patch.object(App, "startup", CoroutineMock())
     p3 = mock.patch.object(App, "shutdown", CoroutineMock())

zigpy/application.py

@@ -1,7 +1,7 @@
 import abc
 import asyncio
 import logging
-from typing import Dict, Optional
+from typing import Any, Dict, Optional
 
 import zigpy.appdb
 import zigpy.config
@@ -398,3 +398,8 @@ def ota(self):
     def pan_id(self):
         """Network PAN Id."""
         return self._pan_id
+
+    @classmethod
+    @abc.abstractmethod
+    async def probe(cls, device_config: Dict[str, Any]) -> bool:
+        """API/Port probe method."""