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Sorry, I misread the hex notation ideed it is 0x0101. I have attached a log-file of a warm-up cycle in the house. You can clearly see the thermostat first limits it's request to the CHmax value (minus one), but then decides to request a higher value anyway.

Via PS=1 I get 00000001/00000001 for msgID=6. I can't find the meaning of the individual bits but I suspect the boiler does not support configuring CHmax through Opentherm. I do think it would be a very useful feature if the opentherm gateway could actively limit the CH setpoint. This allows for a s...

I am trying to optimize the control of my central heating system. The goal is to limit the CH temperature setpoint depending on the outside temperature. My setup consists of a T8851M1000 thermostat and an Intergas HRE 28/24 A-label, obviously coupled to a nice opentherm gateway running flawless sinc...

Thank you for the very quick response. I have flashed the new firmware and it has been running for quite a few hours now with the "update clock" feature in otmonitor disabled. Clock has not been reset since and the log shows that for a situation where the clock was previously reset, it rem...

I have located the communication where the time of the thermostat is reset. 06:38:20.253416 T10146625 Write-Data Day of week and time of day: Wed 06:37 06:38:20.354389 T00140000 Read-Data Day of week and time of day: Unk 00:00 06:38:20.458073 BF0140000 Unk-DataId Day of week and time of day: Unk 00:...

I have recently installed the opentherm gateway between a Honeywell T8851M1000 thermostat and an AWB Thermomaster 3HR 28T boiler. The system has been operational for a few days and I have noticed some issues. Looking at the log I quite often have an "Error 03", about 4000 occurances a day....