I think most users will benefit from this, because every small change in room temperature can be recognized by human body, someone likes 23 degrees, someone 22,5. In my situation, 22,5 is the optimal temperature, so we need to set valve to 23 degrees and then again to 22 degrees. Please implement this.

  @Markirl 

Possibility to adjust the temperature in 0,5 degree steps would be very fine and helps to set the room temperature more precisely to feel comfort and save energy.

I want to buy more of the room thermostats and smart radiator valves, but the 1 degree steps prevents me to do.

There are other companies offer this.

I agree the ability to set temps in 0.5 degree increments would be great. I use home assistant to control my heating system and this would help massively to create a comfortable environment within my home. A side note you mention its possible to do this via manually knob adjustment but this does not seem to be the case in my experience. its mentioned here https://www.tp-link.com/ae/home-networking/smart-thermostat/ke100-kit/

Would be a great feature. I know that display of KE100 is already limited to full degrees level but probably in real life almost all users use this TRV with application and adding a smaller increments of temperature would be really helpful in many scenarios. For example if TRV is not able to reach given temperature because it is closing too fast you could just adjust a temperature a little bit to reach desired one. So it would not only increase comfort but also solve cases when current algorithm can't achieve a given temperature for someone.