Hello Dear Community 
I bought a contact sensor that sends data to my Raspberry Pi via ZigBee. This also works smoothly. Now I have seen some photos and videos that you can make your doorbell smart. I have but unfortunately little idea of electricity or the like and wonder now if possibly someone has a clue how I could implement this. (Attached are the photos of my doorbell and my contact sensor) // The green is the contact sensor and the other two photos my doorbell
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Thank you in advance 
Kind regards
Fabi