Devices that are ZigBee connected though different hubs will not automatically be taken control of in the event of hub failure.
Example:
1 x M3 Hub (A) has 2 lights connected / controlled by it.
1 x M3 Hub (B) has 2 lights connected / controlled by it.
If hub A goes offline then hub B cannot control hub A and the hub A devices will appear offline.
There is a lot of confusion on this a would invite Aqara to clarify how the supposed hub clusters work.
The Aqara application now has a local option (LAN) and when ticked on will use an M3 hub to directly talk to it’s devices over the LAN, my understanding is that this is the master hub in the cluster.
What I have tested is that when cloud fails all automatons if local will still execute. I’ve event tested an M100 hub by pairing a light and a switch to it over a WIFI VLAN then then turning off the WIFI, the automations still run even though the hub if completely disconnected.
Automation that span hubs i.e. a switch that is connected to Hub A switches a light on Hub B is known as edge and my understanding here is that although the automation remains local still requires both hubs to be online to work.
I would love Aqara support to really clarify the hub cluster meaning and how it is supposed to work.
Yeah its a bit annoying. I figure if someone breaks in they would go right for the alarm/m3. If there is no failover, then I might try to use my M2 as just a dumb siren device and keep the m3 somewhere safer. But I remember it being that loud.