For a new build or serious renovation with complete rewiring, this is mostly a solved problem. The Shelly pro 4pm installs in the electric wiring cabinet. It s

For a new build or serious renovation with complete rewiring, this is mostly a solved problem. The Shelly pro 4pm installs in the electric wiring cabinet. It speaks MQTT standard messaging across wired ethernet, but it can also integrate with Shelly's cloud thingies. It's a smart, standards based drop in replacement for ordinary "dumb" AC teleruptor/impulse relay star topology wiring.