If you have a 'dumb' door bell button then you can use the Ecolink door/window sensor, it has a terminal block inside to connect a remote contact closure. I removed all my doorbell stuff (doorbell and 12v transformer) and tucked the Ecolink inside the electrical box that was supporting the doorbell and put a plastic decorative cover (don't want to block the Zwave w/ a metal cover) over it. Works like a champ, I have chimes go off, Alexa notifications, etc; whatever you can think of when you get the signal into HE.
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