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SmartDoorPhone

drawing

Purpose

Purpose of this project is to create a device integrated with Home Assistant that will send notifications when someone is calling the intercom.

Features

  • Notification about the flat number someone is calling
  • Configurable flat numbers to receive notifications

Technologies used:

  • ESP32 / ESP8266
  • ESPHome (uses Platform.io)
  • Home Assistant

Supported / tested devices

Device / board Reference SDP SDP-SIMULATOR
ESP32-CAM esp32dev yes ?
ESP_01 esp01_1m ? yes
ESP32-C3 esp32-c3-devkitm-1 unstable ?

Docs

Maybe

  • Receive calls using something like SIM800L

Technical details

Protocol

For this line low is the active state.

Flat call

Flat call starts with init pulse of about 200ms

line init pulse

Then subsequent pulses gives the flat number that is requested

line pulses

after about 50 ms there will be an analog ring tone signal transfered through the line

timeout after flat number and ring tone

Related links