Blog
Hands-on home automation and hardware, written up properly. More to come.
Make your Busch-Jaeger / ABB-Welcome intercom smart
What's possible: push notifications, blinking lights and a door opener for a wired 2-wire building intercom, with an ESP32 on Mat931's open-source board and Home Assistant.
How to make your Busch-Jaeger / ABB-Welcome intercom smart
The step-by-step companion to the overview: ordering Mat931's board, flashing it, ESPHome and reading the bus, the Home Assistant automation and the honest notification trade-offs.