See this topic for lots of info:
SonOff USB Dongles have to be paired to your hub, just like any other Zigbee device.
Regarding pairing, from that topic, the steps below have worked for me to pair the dongles to my hub each time I've tried it:
See this topic for lots of info:
SonOff USB Dongles have to be paired to your hub, just like any other Zigbee device.
Regarding pairing, from that topic, the steps below have worked for me to pair the dongles to my hub each time I've tried it: