Bosch BTH-RA: Control-loop behaviour changeable?

[llienenl]

I am using the Bosch BTH-RA device (thermostat) with a Aquara thermo sensor (as an external temperature sensor). Both is sending data via Zigbee2Mqtt to my Node-Red instance. I am using the setup now since a week, and in general, it is working as expected. When the remote temperature (measured via the Aquara sensor) is getting under the "occupied heating set point", the Bosch device is starting heating up (increasing number in "pi_heating_demand". I am questioning myself if it is not possible to make it a bit more intelligent. The current scenario represents a really slow control-loop (oscillating between 1.5°C), in fact, worse than just using the old state-of-the-art thermostat. The old one was able to hold the temperature level all the time quite constant. If I am not able to adjust the control-loop, there is no more benefit than being able to adjust set points for different times of days. Any ideas from the forum?