@FredericRP the first or the second soldering you made ?
You can detect ringing ?
The only useful one is the dark blue on the picture above that allows shunting the SW2.
I can not detect ring but for now that is not necessary: people can ring on the intercom then tap on “Open” in the app. It’s not as user-friendly as it could, but it’s working… until someone is able to tell me what is expecting the Nuki Opener on the yellow wire !
Thank you @FredericRP , you made me think differently and try deeper to find a solution.
I took some readings and … So to detect rings, here are the connections i made, let’s forget about the yellow wire for now, keep your original two cables, add the blue to SW2 as @FredericRP mentioned, violet to GND ( the terminal on the right ), both green and red to the red wire on the handset terminal and Nuki black to the green one.
For my purpose of use, i completely removed the handset, so when someone rings, Nuki can receive the rings and open the door if ring to open is set to on, i also received notifications when someone rings and i can manually open the door.
the only issue for now, is that i need to manually ends the call, or until someone rings on other or open the door manually, untill i add a small thing to SW1, hopefully soon