sudo pip3 install jsonschema coloredlogs
domoticz/plugins/Domoticz-Zigbee
, run python3 -m zigpy_znp.tools.energy_scan /dev/ttyUSB0
where /dev/ttyUSB0 is the serial port to the USB dongleThis should provide you a scan of all Zigbee channels and reports the level of noise
If you do not succeed here, this mean that something is wrong between the system and the USB dongle