Since I moved from OH deconz to zigbee2mqtt my led bulbs (two of them) start flashing every hour for 1/4 second at max. Brightness. Both bulbs flash indipendent of each other and only when it is dark( or maybe I don‘t recognise it by day). Is there any life check parameter, I don’t find?
That doesn’t sound like a zigbee2mqtt problem to me. z2m has an availability feature in the settings of the device (it can ping devices periodically) but that doesn’t turn on devices. You can monitor the messages from zigbee2mqtt with tools ike mqtt-explorer.
Do you have any openhab rules that might get triggered?
Or do those bulbs have electronic switches without neutral line? Those switches often make led-lamps flicker because they pass a little power when being switched off.
The led bulbs just substitute normal bulbs at the ceiling. I will disable the rules tonight (just triggered by motion sensors, which works perfectly) and monitor the mqtt messages.