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Update on this: I haven't managed to make the thermostat report a software version. But I did manage to find another Chronotherm with the same model (T8851M1000), now connected to the same boiler and gateway. This one does not have the same behavior. When it receives a time input from the gateway it...

What is the best way to get that attribute? Pull the plug from the thermostat to the gateway, reconnect it while OpenTherm Monitor is logging, or is there some smarter way to make it send the software version? It also seems there are different Chronotherm Modulation versions, mine has a sticker on t...

I've created a longer log of about 10 minutes, the time was correct within ~5 seconds at 10:30 when I switched from monitor to gateway mode and it ended up behind by 4 minutes at 10:40. The log below is shortened to stay within the maximum post size of the forum, but here is the full log: https://pa...

Sorry, this is around 2 minutes in monitoring mode, let me know if a longer period would be helpful: 11:42:17.401225 GW: 0 11:42:17.462410 T10010A00 Write-Data Control setpoint: 10.00 11:42:17.522006 BD0010A00 Write-Ack Control setpoint: 10.00 11:42:18.472594 T00110000 Read-Data Relative modulation ...

I have the same model boiler, it reports error 03 roughly 5 to 10 times per minute with much more rarely an error 04 in between. In case it is helpful here is a much more complete log of it happening. The expected effect that the thermostat repeats the request is visible, except once at 09:31:29 whe...

I have a very similar issue with same model Chronotherm 4 (T8851M1000), the clock does not work well when connected to the Opentherm Gateway. In my case it does not reset fully back to 00:00 but it runs far slower than it should be. After some research I think this log describes the issue: 09:24:50....