Hi @curiousB
Only part I asked was the 6th item actually 
Because there needs to be a receiver/server which is listening the messages coming in to the hub.
We already have our FW API. You can use that API to request an update on the device status itself actually. Instead of requesting a poll, you can go and directly update the status of the power item.
Check this thread to see how you can directly use the http api Ezlo platform - How to use HTTP API commands aka Luup Requests