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
• May decrease the audio and video quality