Demand radiator temperature


I have a heatLink connected to a boiler via openTherm. Via the nest API I can see if the boiler is on or off, what the current ambient is, and also what the requested ambient temperature is. What I can’t seem to see is what the demand radiator temperature is.

I /think/ that as the delta between demand ambient and actual ambient reduces, so the demand radiator temperature should fall to prevent an overshoot…is this correct, and can this data be extracted via the API?


Hi, did you manage to work out how to obtain the flow temp demand? I’m having some issues with my heating (Nest 3rd gen and Opentherm boiler) and this info would be extremely useful for troubleshooting.