Hello,
I have a similar problem. I am running with nanoCUL hardware and Raspberry Pi 3 integrated with openHAB 2.
The device is connected and the packets are exchanged. But after some time (1-5 minutes ), CUL is automatically disconnected. The openHAB thing goes offline (says Communication Error).
When I restart the hoemgear, It is running again, for 1-5 minutes.
In the log, I see the similar messages as written in this issue. I also changed the Power supply, yet the issue persists.
Kindly help.
Thanks.