Writing certain value fails (checksum = 5c)

[qabi]

I don't know if this is an issue in my actual heat pump controller (VVM500) or in this project?

Writing to 47032 (external adjustment) works for values 3, 2, 1, 0, -1, -3 and -4 but NOT for -2. That seems very strange.

Actual data sent:

-1: c06b06b8b7ff0000005d (works)
-2: c06b06b8b7fe0000005c (no response)
-3: c06b06b8b7fd0000005f(works)

Just found out now, that it is very likely related to the checksum being 5c, which there is some code to remove duplicates, etc. Will look further into this.

[elupus]

Yes 5c should be duplicated and/or replaced when its the checksum

[elupus]

This must be done in the sending app i think. I think we precalculate the block before sending.

https://github.com/yozik04/nibe/blob/cfe4b8173b5fbbcefc9047842111761d9a45d5b7/nibe/connection/nibegw.py#L837

Likely needs the dedupe code of the response type.

[qabi]

This must be done in the sending app i think.

I introduced the if chksum == 0x5C then chksum = 0xC5logic, and that fixed it for me.

[elupus]

Its not fixed yet in neither nibegw code nor nibe python lib so issue is still valid.

[qabi]

Its not fixed yet in neither nibegw code nor nibe python lib so issue is still valid.

Ok. I was of the understanding that it should be fixed in the sending app, and not nibegw.

[elupus]

Yes, but we have no issue there yet :)