Thanks, I doubt this value represents the opening of the valve though. It is heating in % per room. The valve just completely shut and the value dropped from 100% to 38%. I guess it is making a guess about the residual heat being output by the radiator. I will observe this, but I still don’t think that here are more states than “open” and “shut”.
Really a pity given the price tag of these devices. I have very old and big heating pipes that are very loud. When I use conventional TRVs, they are very quiet, but all the smart ones I’ve tried can only go full throttle.