Hi,
I bought sonoff trvzb Thermostats and tried to pair them, everything worked, but the device was gone after a few hours. Not responding and the antenna Icon on the Thermostat was gone. First i thought it was the distance so i Put a smart Powerplug as a repeater at half the distance. But with now luck. I even changed from a ZBDongle E to a ZBDongle P wich works for someone else perfectly. I tried Z2M and ZHA (currently zha) but no luck. If someone has gone through this problem it would be nice to share your solution to this.
Thanks in advance for the help.