The problem is: will it update automatically as it changes temperature?
Hi
Yes just a way to test you could publish the sensor state via mqtt to the device. I would suggest you open a new post specifically mentioning Haspone and what you are trying to do. It might attract more attention from the people who have Haspone experience. I don’t think I could work out what next step without a Haspone myself. Might get one in the future though if I see you were successful. 
Ok thank you very much!