This device does not simply shorts the wire anymore, it probably sends a signal (or shorts a pin) and I was wondering if someone has ever deal with it. I saw other posts that are not that far away, but did not get responses:
Since the buttons are physical, I could ultimately look at making the “press” close to the button but if someone has had any more lunch I would be delighted to learn from your successes
Looking at the PDF… GT XI and Y1 are your connections for the buttons and CP is for the intercom at the entrance side whist S- and S+ are the ringer leaving Line for circuit:
Thanks. I will have to measure that because I am not sure that shorting CP is enough to trigger the opening of the door (I have a bad feeling that this will be a composite signal, not just a shorting)