EspSmartSipDoorbel

ESP8266 based doorbell ringing Fritzbox DECT phones via SIP protocol (like Fritzbox)
with MQTT support to integrate into home assistant, io broker or any other smart home solution.

Hardware Components

• 1x WeMos D1 ESP-Wroom-02 ESP8266 Wifi Bord with 18650 Battery PWM I2C
• 1x 18650 3.7V 3400mAh Li-Ion Battery
• 4x IN4007 DO-41 rectifier diode 1A 1000V
• 1x 470uF 16v 8x12 electrolytic capacitor
• 1x 320 Ohm resistor
• 1x PC817 Optocoupler
• 1x Breadboard

12V AC Doorbell to ESP8266 deep sleeping reset button

Basically it's easy: Connect your doorbell (left), convert AC to DC (middle) and reset the ESP8266 when doorbell rings (right).

There's a lot of different hardware solutions, that's just the one that works for me. You can use the samecode and trigger the ESP reset in a bunch of different ways.

Home Assistant Event Configuration

Here's my example configuration for home assistant, to react to doorbell with a critical alert to my smartphone:

alias: Doorbell(Stefan)
description: ''
trigger:
  - platform: mqtt
    topic: homeassistant/home/doorbell
    payload: 'ON'
condition:
  - condition: state
    entity_id: person.stefan
    state: home
action:
  - service: notify.mobile_app_stefansIphone
    data:
      message: It's ringing!
      title: Doorbell
      data:
        push:
          sound:
            name: default
            critical: 1
            volume: 1
mode: single

Credits

• Project inspired by Konrad Elektronik
• Working source code based on https://www.mikrocontroller.net/topic/444994
• Rectifier inspired by AEQ-WEB

Support my work ...

...with caffeine?