Hello! I bought 2 Xiaomi Smart Heater 1S a week ago. It was easy to connect them, but both heaters measure the wrong temperature. When it is 21-22 degrees Celsius in the room, They show 17 degrees. That means, that I cant start them on 16 degrees and get 16 degrees. They are heating continiously up to at least 21-22 degrees. That is not acceptable for me, because I want to put the house on 16 degrees when Im not there, a few days. And thats not possible. Is it possible to calibrate the sensors? Or is it only to send them back to the company who sold them?