PWM tuning?

[JayUK]

Hi there,

I have the adapter connected to a Vaillant Ecotec 837 combi boiler. After a lot of trial and error I discovered I had to remove the jumper - which is not documented anywhere.

Anyway, the adapter and boiler seem to be communicating, I have the default PWM value of 130.

Does this value need optimising/tuning? How do you know if it's set to the ideal value?

[danielkucera]

Hi @JayUK ,
It is somehow documented but I admit not very clearly because it is inherited from previous version:
https://github.com/danielkucera/esp-arduino-ebus?tab=readme-ov-file#v52

If you don't see communication errors in ebusd logs the value should be correct, it looks like 130 fits most installations.