So… again, it might work, but you’ll have to find some other way to get the signal when the doorbell rings. (It actually sends it twice, but the ‘notify me when’ app ignores the second signal). That moment was enough to trigger the “OPEN” signal. When it blinks off, there is no connection between the red and black wire for a moment. When somebody rings the doorbell, the light blinks off / on / off / on. When nobody is ringing the chime, it is on: the red and black wire are connected. I had not really even noticed that LED before… but it was the winner. I was pretty much looking for two points that were either disconnected or connected when no doorbell press was happening… but then changed that state when the doorbell was pressed. I took apart my chime and had my multimeter in the mode that detected resistance. If I connected the other ends, it would send a “CLOSED” signal. For example, if I attached two wires to it and held the other ends apart from each other, it would send an “OPEN” signal. Whoever makes the window sensors decided they might as well include that as a bonus… and it’s great! It detects if the two wires attached to it are connected or not. That green box on the window sensor is a dry contact sensor. It might work, but you’ll have to figure out a different way to do it. It works really well! I get notified almost immediately, while the doorbell is still making its noise. I used the “MIMO Lite Doorbell Device Type” (pretty much so it would say that it was a doorbell instead of a door) and the “Notify Me When” smartapp. I then put it all back together, letting the wires just poke out of the top of the chime into the sensor: I just didn’t screw the top screws all the way together. I opened the window sensor and plugged the wires into the contact sensor (red on the right). I then cut off the LED and stripped the wires. I opened the Door Chime and scraped off the glue from the LED. (Spend some time with a multimeter trying to figure out the best way to do this… then…) Ecolink Z-Wave Door/Window Sensor (DWZWAVE2-ECO).Wireless Door Chime GE Model 19208… since that is what I had.I’m sure others have done this, but I couldn’t find it… I recently moved into a house with a wireless doorbell, and wanted to get notifications when it rings.
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