Extremely frustrating setup. Hit errors along every step. Worked with support for 5 hours [after having already spent hours trying to get the thermostat hooked up to wifi] and after needing multiple devices [just a cellphone wasn't good enough] eventually got a workaround. Spent way too many hours to hook up a "smart" thermostat. I'm glad it's finally working, but I won't be buying thermostats from here in the future.