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For my system (VWL 55/6, VIH QW 190/6, VRC-720)

I merged the official ebusd config:

with this one:

The register to set target temp is: HwcTempDesired
The register to set mode is: WarmWaterModusStatus

commands:
ebusctl write -c basv HwcTempDesired TEMP
ebusctl write -c hmu WarmWaterModusStatus MODE
0 for eco, 1 for normal, 2 for balanced

You could extract the ZZ, PBSB, ID from the git repositories if needed.

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