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ESP32 Bus Interface for ABB-Welcome and Busch-Welcome

This device allows you to integrate your ABB-Welcome or Busch-Welcome 2-wire doorbell intercom system into Home Assistant. Features include doorbell notifications and remotely opening your door. You can order the fully assembled board from a PCB manufacturer.

How to order

How to flash with ESPHome

How to customize for your system

Example applications

  • Get notified when someone rings your doorbell
  • Open your front door using your smartphone
  • Build external door opener buttons that also stop the doorbell ringtone
  • Turn on the hallway lights from Home Assistant
  • Send and receive any control message on the ABB-Welcome 2-wire bus

Limitations

  • Only works with 2-wire systems, not ABB-Welcome IP
  • Audio and video is not supported by this hardware

PCB image

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