Sorry, i have to give up on this. Something strange happened yesterday.
After getting quite bad sound quality out of the node module i did something else and suddenly i heard a bang, followed by a strange smell.
After unplugging and disassembling i found at least one capacitor dead in the module.
Have not decided if i salvage some parts or try to get at least the leds and the IR back into function ... currently it is just heating up when i power it.