Rofo, thanks a lot. I think the main reason why I’m thinking about a „central“ management is that until now (in Homekit) there was no easy way of changing the temperature relatively („increase target temperature in all rooms by 1°C“). This would mean that e.g. the bathroom goes from 24° to 23° while the hall goes from 19° to 18°.
Adjusting the temperature on a relative basis might be easier in HA, I haven’t thought about it, as I just started migrating to HA a few weeks ago.
Thanks for mentioning the boiler. I’m aware of that. In my rented apartment I cannot change the boiler and its thermostat (which unfortunately is in a room I don’t use regularly), all I can adjust are the TRVs I purchased in the past two years. And as my boiler (Vaillant) is terribly oversized (it has a capacity of 25kW, while I only need 10-12kW in the coldest period of winter), I have the issue of the boiler turning on because the temperature dropped in that one room by 0.5°, to send hot water to all radiators and as that heat cannot be emitted quickly enough, the boiler turns off after a minute again, only to start the cycle 2-3 minutes later. This causes a high energy consumption, which is why I’m trying to come up with as many ways to save energy as possible. One way is to overheat the room with the fixed wall thermostat (calorMATIC 370) once per hour by 1° to reduce the number of starts of the boiler, the other one is to fine tune all TRVs shortly before the boiler starts heating again, which is why I’m searching for a thermo sensor that has a higher precision than the 0.5°C of my fixed thermostat.
I’ve already come across scheduler-component and plan to use it. I’m unsure though if better_thermostat has any advantages in my use case over generic_thermostat.