ConnectRequest failed: add status code

xknx/io/request_response.py

@@ -5,7 +5,7 @@
 """
 import asyncio
 import logging
-from typing import TYPE_CHECKING, Type
+from typing import TYPE_CHECKING, Optional, Type
 
 from xknx.knxip import ErrorCode, KNXIPBodyResponse, KNXIPFrame
 
@@ -35,6 +35,8 @@ def __init__(
         self.success = False
         self.timeout_in_seconds = timeout_in_seconds
 
+        self.response_status_code: Optional[ErrorCode] = None
+
     def create_knxipframe(self) -> KNXIPFrame:
         """Create KNX/IP Frame object to be sent to device."""
         raise NotImplementedError("create_knxipframe has to be implemented")
@@ -70,6 +72,7 @@ def response_rec_callback(self, knxipframe: KNXIPFrame, _: UDPClient) -> None:
         if not isinstance(knxipframe.body, self.awaited_response_class):
             logger.warning("Could not understand knxipframe")
             return
+        self.response_status_code = knxipframe.body.status_code
         self.response_received_or_timeout.set()
         if knxipframe.body.status_code == ErrorCode.E_NO_ERROR:
             self.success = True

xknx/io/tunnel.py

@@ -170,7 +170,9 @@ async def _connect_request(self) -> bool:
                 connect.identifier,
             )
             return True
-        raise CommunicationError("ConnectRequest failed")
+        raise CommunicationError(
+            f"ConnectRequest failed. Status code: {connect.response_status_code}"
+        )
 
     async def _connectionstate_request(self) -> bool:
         """Return state of tunnel. True if tunnel is in good shape."""