I moved an existing zbmini to another location. It was well wired, and I saw the green light on the button. Yet, in HA I was unable to access the device. So I removed it from the Zigbee HA. My idea was to reset it and add it again. Yet, holding the button for 5 secs didn’t help. 20 seconds or even 60 seconds didn’t work. Cut off the power wasn’t the solution.
I have the Sonoff Zigbee usb stick with antenna. My initial problem was the distance of the ZBMini, it couldn’t be reached. (it’s outside, 30 meters away?). So removing the device from Home Assistant might have been stupid. I don’t know how I can add it again. yet, strange that I can’t reset it by holding the button?
Pressing the button should work. If not, try to move it closer to your coordinator.
The distance might have been the real issue. Allthough the usb dongle should at least cover a distance of 20m? I will flash the usb stick so that the antenna strenght is set higher. (20dbm instead of 5dbm)