Requirements: Wi-Fi network, Mobile hotspot.
Your Wi-Fi network name might contain letters/special characters (= , _) that the thermostat can’t support. Change the name of your Wi-Fi network so it only contains common letters or numbers.
Your mobile hotspots name, might also contain letters/special characters (= , _) that the thermostat can’t support. Try changing the name of your Wi-Fi network so it only contains common letters or numbers.