We have had outbound zigbee group messaging for over a year, I don't believe ST has this even now.
We don't support inbound group messaging, so yeah there is that.
Ikea is the only current device manufacturer that I'm aware of that requires group messaging support on the coordinator for some of their devices, not all of them, just some of them.
This simple fact, along with the fact that virtually every single device (bulbs aside) that Ikea produces works differently, even if they have similar capabilities, basically each one requires a ground up dedicated driver...
I have a pile of devices yet to support where the firmware wasn't written by 6 different committees, and or a group of toddlers, my time is best spent there.
Once I get through these conforming firmware devices, maybe at some time in the future we can revisit inbound group message configuration and support, in the mean time wonkey device support from Ikea's collection is not a priority.
