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Had a better look at what the thermostat was sending out: First it sends out 10 bits with a cycle time of 2 msecs if these are manchester coded then it would read 1111.1111.11 After this there is a 6msec wait followed by what looks like a manchester coded opentherm message with 34 bits of exactly 1m...

The Remeha Tzerra Ace boiler has what they call an R-bus. This bus should be capable, according to the documentation, of running the OT protocol as well as some kind of specific Remeha protocol. The E-twist thermostat should also be able to talk Opentherm. I have the Nodo shop opentherm gateway runn...