In simple on/off example, the client can turn on several server nodes in the same group in the same time,
but in serial example mix simple on/off server, the info center only show to set on to one server node,
1. is it possible to turn on all the server in same group in the same time in serial example?
how to add a server to a group ?
and are there serial commands using interactive_pyaci.py to do this function ?
2.what is the difference between "group" and "subnet" in ble MESH?
If those two are the same thing, how to change subnet of a server node in serial example?
3.why in provisioning , devkey start at 8 ?
how many server nodes can be provisioned in recent serial example provisioner ?