Comments (2)
mvn23
commented on August 16, 2024
I see the same behavior here. However, after checking the code, I found that it matches the protocol specification I used (v2.2): message ID 117 (0x75) for CH pump starts and 118 (0x76) for hot water.
It is unlikely that this was changed between versions, so either the specification I have is incorrect or both of our boilers have implemented this the wrong way around. If I can find some proof for the former I will update the code accordingly.
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mvn23
commented on August 16, 2024
No progress in more than a year. While this bug is backed up by real-world examples in at least 2 cases (including my own), we do follow the OpenTherm spec with the current implementation.
Other software packages seem to deal with this in the same way. While this in itself is of course no valid reason to not change anything, I do want to mention it as an additional consideration.
Closing this for now, please feel free to open a new issue if and when new information becomes available.
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Related Issues (20)
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