In case it uses a magnet, you can also simply use a door contact sensor (one part of it).
When the door bell rings and the magnetic field is established, the “door” sensor will be activated.
Video (in German though).
In case it uses a magnet, you can also simply use a door contact sensor (one part of it).
When the door bell rings and the magnetic field is established, the “door” sensor will be activated.
Video (in German though).