Comfoair Binding - Response NULL

Hi,
I followed the instructions given regarding the ComfoAir Binding.
Unfortunately, the response received by openhab is always NULL.
My ComfoAir is connected with my PI via serial to USB adapter
Any idea?
Thanks a lot in advance!

Here my setup:

  • Openhab 2.4.0-1
  • Zehnder ComfoAir Q350
  • LogiLink UA0042A USB Adapter USB 2.0
  • DeLock Adapter Sub-D 9-polig
  • Cable: Ethernet cable
2019-06-01 12:37:12.917 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 d1 00 7e 07 0f Response: null
2019-06-01 12:37:12.921 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 d1 00 7e 07 0f
2019-06-01 12:37:14.025 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 d1 00 7e 07 0f Response: null
2019-06-01 12:37:14.028 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 d1 00 7e 07 0f
2019-06-01 12:37:15.132 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 d1 00 7e 07 0f Response: null
2019-06-01 12:37:15.137 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 d9 00 86 07 0f
2019-06-01 12:37:16.240 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 d9 00 86 07 0f Response: null
2019-06-01 12:37:16.242 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 d9 00 86 07 0f
2019-06-01 12:37:17.345 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 d9 00 86 07 0f Response: null
2019-06-01 12:37:17.347 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 d9 00 86 07 0f
2019-06-01 12:37:18.449 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 d9 00 86 07 0f Response:  00 00 ff
2019-06-01 12:37:18.451 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 d9 00 86 07 0f
2019-06-01 12:37:19.554 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 d9 00 86 07 0f Response: null
2019-06-01 12:37:19.556 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 d9 00 86 07 0f
2019-06-01 12:37:20.658 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 d9 00 86 07 0f Response: null
2019-06-01 12:37:20.660 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 d9 00 86 07 0f
2019-06-01 12:37:21.763 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 d9 00 86 07 0f Response: null
2019-06-01 12:37:21.769 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 0b 00 b8 07 0f
2019-06-01 12:37:22.874 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 0b 00 b8 07 0f Response: null
2019-06-01 12:37:22.877 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 0b 00 b8 07 0f
2019-06-01 12:37:23.981 [WARN ] [.comfoair.handling.ComfoAirConnector] - Retry cmd. Last call was not successful. Request:  07 f0 00 0b 00 b8 07 0f Response: null
2019-06-01 12:37:23.984 [DEBUG] [.comfoair.handling.ComfoAirConnector] - send DATA:  07 f0 00 0b 00 b8 07 0f

Do you have a solution already?

Unfortunately not. Finally I decided to buy a knx interface which is working.