Smart intercom based (ESPHome version by Ge1mer)

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Scheme and parts

Features and modes

Automatic door opening mode (one call or permanent)
Automatic call rejection mode
Silent mode (one call or permanent)
Home Assistant integration
Notifications and controls via Telegram
Adjust LED brightness
OTA updates

Button and LED

Red LED blinks
- Incoming call
Red LED is on
- "Reject calls" mode
Blue LED blinks
- Connecting to WiFi or Home Assistant
Blue LED is on
- Silent mode
Blue LED blinks
- Silent mode once
Green LED blinks
- "Automatically open once" mode
Green LED is on
- "Automatically open permanent" mode
Short button click
- No call - enables automatically open/reject door mode (once by first click, permanent by second click, reject by third click)
- Incoming call - accept call and open door
Double click
- If no call enables mute mode
Long button click
- No call - disables automatically open/reject door mode and mute mode
- Incoming call - reject call
8 clicks - factory reset

Configuration and build

Fill in WiFi credentials in domofon.yaml
Use ESPHome to build and upload firmware

Home Assistant Telegram notifications

Put this file into /config/packages/domofon.yaml and correct notification service in automations.