question

Actually i think it works with ni changes yo the API. It is just using the set command with a value. You do not have to say percent.... and you probably want to use the device specific info on discovery to bote its a thermostat.... but nothing different...

Thanks. You are right - it doesn't seem to care what the device is when you say "set the temperature to...". I was a bit surprised, but I guess it depends on the Echo not doing silly things like getting confused between the Kitchen light and the Kitchen stat, and setting the thermostat temperature to 100 degrees when you actually wanted to set the light dim level to 100%.