Error while refreshing device: responseBytes are null..

[motorcross3973]

The adapter instance does produce the following error: while refreshing device: responseBytes are null.

To Reproduce
Steps to reproduce the behavior:

1. Set Up Adapter with path for stick to: /dev/ttyUSB0
2. Set refresh time to 5 sec
3. Started the adapter
4. See error in iobroker protocol

[marc2016]

Hi @motorcross3973 ,

I get the same error message over and over again. But the control of the shutters still works. I'll check the control of the USB stick.