Here are some samples from other systems I use - very basic offline ones - all of them allow to check the valve open status - shown in %. These valves EASILY stabilize at given temperature and can be...

@KariBenz sure! If a device can adapt to its environment, that would be great, but I think even that is not absolutely necessary if there is a proper algorithm for proportional correction in place....

@Wayne-TP no, the idea came from my specific use-case. The switch is fine for its basic intended use and probably it will work just fine as it is for most people. For now I have added Tapo Smart...

Outdoor sensor of a probe that can be connected to internal unit with batteries - just like every basic “weather station”.

@Markirl I'll vote for YES, but... I have some serious issues with keeping the temperature where I want at all. Does your valve also oscillate and go into annoying open/close cycle? I've described...

@KariBenz thanks for backing up my observations. It's so annoying... I was hoping for an improved comfort and maybe some "side" effect in form of savings, but now it's worse than it was with good old...