There are a few different ways to solve this problem. Wyze hijacks an existing wire for constant power and pulses it to transmit the signal. The adapter then translates the pulse to signal whatever to turn on. I believe most smart thermostats have some sort of solution...including the nest products. If there is a one of situation where you don't, they make a product for that too: https://www.amazon.ca/Google-Nest-Po...28153101&psc=1This quote is hidden because you are ignoring this member. Show Quote