I have not debugged it much, suspect hw as I tried a few sw things without success. But could be sw fix. Anyway I'll make a new revision, this current one is a

I have not debugged it much, suspect hw as I tried a few sw things without success. But could be sw fix. Anyway I'll make a new revision, this current one is a bit limiting due to the MCU and one minor hw bug that needs manual rework of the pcbs.