Solve T9485 by
- SerialLayer: emit serialErrors
- AtCore: handleErrors from serialLayer
- TestClient: Improve change to disconnect state
Most serial Errors are shown. Unless you get the error for device removal in that case, you will get a serial error about not being able to read from the device Then after some time about 2 minutes for my test device you will be disconnected from the device and atcore will close the serial layer.