Scope: I want my SmartThings to sense when my Marantz Receiver is turned on or turned off. And based off that info, I want my lights to dim to certain levels for movie/tv viewing. How can I do this?
My idea: Run an arduino off of the receivers RS-232 port and constantly poll the receiver for information and forward that data to my SmartThings hub. What is the best way to connect my arduino to the SmartThings Hub?
Any other ideas?