@SarahH I understand your point. However, here, the goal is merely to get intel and be able to drive the heatpump more conveniently.
For example I read about hysterisis troubles in another post. The MQTT link allows for example (at least that’s wjat I implemented) to have a 0.2C hysterisis on my floor heating and a 0.5C hysterisis on my radiator zone. It sure makes it more confortable compared to the samsung’s default 1C hysterisis.
Cheers