Well, I tried what the lads did above:
- Soldered on the back 2 wires directly to the switch pins (blue and purple)
- Connected yellow and green to 5 and 6s respectively
- Had my partner downstairs testing stuff
Suddenly smoke came out and blew one of the components of my intercom. I guess one small component gave out and now I’m without intercom. If nobody experienced this before it could be that mine was just old and tired.
I will try and fix it and if not look for a different intercom that works with the same wiring of the building. If I can’t do anything about it I will return the Nuki opener.
Edit: apparently there is a continuation of this thread here, and I’ll try that next: Elvox 8879 as generic analogue intercom -> nuki opener