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Well, I was confused because of your explanation in the first reply: Opentherm is used with modulating boilers. Contrary to boilers with on/off control, modulating boilers don't just have a simple on state. You have to tell the boiler how much "on" you want it to be. The way to do that wit...

@hvxl: OK, I understand, I believe the CS command is implemented, but as a temperature, not as a modulation %. And I see a similar thing in the doc behind your link: CS=temperature Control Setpoint - Manipulate the control setpoint being sent to the boiler. Set to 0 to pass along the value specified...

Hi, I have the OTGW connected to a Pi, included in Domoticz, for a while, and it works perfect. I currently: -read activity -set outside temp -set room reference temp (thermostaat is in the living) Now I would like to also use it to control the heating of the upper floors, For that I have to overrul...