This project is for smartifying a siedle doorbell without going through siedle.

Sources

• https://www.microchip.com/en-us/solutions/consumer/audio-and-speech/recording
• https://github.com/CybDis/EspSmartSipDoorbel?tab=readme-ov-file
• https://www.reichelt.de/magazin/projekte/smarte-tuerklingel/
• https://github.com/opend-connect/openD
• https://github.com/mbs38/siedle-in-home-bus-avr
• https://www.panbachi.de/smarte-tuerklingel-alte-sprechanlage-smart-machen/
• https://www.richis-lab.de/Siedle.htm
• https://esphome.io/guides/getting_started_hassio.html
• https://community.home-assistant.io/t/sss-siedle-hta-811-door-phone-notify-in-ring/405179
• https://github.com/chrta/sip_call
• https://www.mikrocontroller.net/topic/442157
• https://gist.github.com/denalena/b043b2f46fe9475c37c01a16c923efc3

Potential entry points

• Wifi -> fritz.box -> sip
• Wifi -> Homeassistant esphome

Production steps

• Identify pins (permanent power, buzzer, bell)
• Produce rudimentary notification mechanism (depends on entry point)
• flash and test
• attempt communication

Present Hardware

• Siedle HTA 811-0
• Xiao ESP32C3