I have two IKEA Tradfri On/Off switches. I want them both to turn on and off the same group of lamps, even if Home Assistant is powered off.
I have created a group in zigbee2mqtt, and bound the first switch to that group successfully. However, when I try and bind the second switch I get an error message in zigbee2mqtt’s log.
Could this be because it isn’t possible to bind more than one switch to a group, or was I just lucky to get the first switch to bind first time?