After reading a lot, I am still very confused... Maybe you could give me some hint?
I am looking for:
- a temperature sensor in my room
- a thermostat on my radiator
It is important to me that these are separate devices, because the drop of temperature across the room maybe large and I want to control the temperature of the place where the sensor is.
The temperature sensor shall control my thermostat. The system should be programmable. If possible, both systems should be battery powered.
I would spend more money if the system would be Apple HomeKit enabled.
Any suggestions which system(s) could fit?