Grabbing doorbell signal – recommendations?

Hardware
1

Hi,
I have a Siedle CA 812-2 BS/W doorbell to open the door of my fence. I am now looking for a solution to grab the doorbell signal. I have a few options in mind and would be happy to hear your experiences or recommendations:

  • FIBARO Smart Implant- Z-Wave – I do not know, whether it gets enough power. A Wall plug is only 50 cm away to repeat the signal.
  • ELV Homematic Komplettbausatz Funk-Klingelsignalsensor – I do not know, whether it fits in the Siedle.
  • Nuki Opener – will be launched in near future
    With the grabbed signal I will trigger a wireless doorbell, trigger e-mail/push notification or whatever…
    Thanks!
2

That sounds like a perfect opportunity to use an ESP8266 or ESP32 microprocessor board and ESPHome sub-system. :smiley:

1 Like
3

Sounds interesting. Butdoes this get´s power? And I think, I have to spend a lot of time, to get familiar with this nice toy.

4

The nicest thing about ESPHome is you specify devices and their functions with YAML configuration files, exactly as you do in Home Assistant. If you can already edit a YAML file, it should not require more than a few days to generate an ESPHome node. :slight_smile:
With regards to wiring, I suggest an opto-coupler should be used to electrically isolate the ESP32 from the doorbell. With regards to power, the ESP32 requires a 5VDC, 2.4A power supply and talks to Home Assistant through normal WiFi. Most ordinary USB power bricks can do the job. You could also use a device like this one to power the ESP32.

5

I have used a fibaro binary sensor in the bell box. I added a relay with the coil connected to the transformer in the bell via a bridge rectifier to convert the 11v AC to DC. When the bell rings, the relay energises and triggers the fibaro binary sensor.

6

Check out this recent DIY posted by Frenck.

1 Like
7

Here is an older Moteuino project someone posted in 2015, just for reference.