Rehema Tzerra central heating interface

JJan · January 12, 2021, 9:47am

Hello all

This is my first post to show one of my projects.

I have made a python script to read data from my (typical Dutch) Remeha Tzerra central heating appliance. The data is sent as mqtt-messages.

phoenix-blue · January 21, 2021, 8:38pm

Hi,
Question is it possible to change the room setpoint back to Opentherm) with this interface and/or read out the room temperature?

JJan · February 4, 2021, 7:28pm

This interface is not based on OpenTherm but on the RS232 interface of the heater itself. It does not give room temperature nor room setpoint because the heater does not know these. For now it is read-only. Maybe I will implement setting some parameters in the future.