Nuki Opener, but as ESPHome device

README.md

ESP based door buzzer (for intercoms, like nuki opener)

• Create a new device in ESPHome, use the contents from esphome.yml as template
• Create a new automation in your homeassistant, use buzz-open.automation.yml as template

Device

Connect a transistor / relais controlling your intercom buzzer line to GPIO D2 of your esp.

Webhook

Look into https://www.home-assistant.io/docs/automation/trigger/#webhook-trigger for documentation.

Tl;dr: Call https://<your-home-assistant>:8123/api/webhook/door-buzzer if your instance is reachable by your device directly (e.g. using wireguard / tailscale or dyndns), or use the unique Nabu Casa Webhook URL like on https://www.nabucasa.com/config/webhooks/#triggering-automation-with-a-webhook

buzz-open.automation.yml

alias: Remote Door Buzzer
trigger:
  - platform: webhook
    webhook_id: door-buzzer
    allowed_methods:
      - POST
    local_only: false
condition: []
action:
  - service: switch.turn_on
    data:
      entity_id: switch.door_buzzer
  - delay: "00:00:04"
  - service: switch.turn_off
    data:
      entity_id: switch.door_buzzer
  - service: notify.notify
    data:
      message: Door buzzered

esphome.yml

esphome:
  name: door
  platform: ESP8266
  board: nodemcuv2

wifi:
  ssid: '...'
  password: '...'

logger:

ota:

api:

switch:
  - platform: gpio
    pin: D2
    id: gpio_d2
    name: "Door Buzzer (internal)"
    discovery: false
    
  - platform: template
    name: "Door Buzzer"
    icon: "mdi:access-point"
    turn_on_action:
      - switch.turn_on:
          id: gpio_d2
      - delay: 5s
      - switch.turn_off:
          id: gpio_d2
    turn_off_action:
      - switch.turn_off:
          id: gpio_d2
    optimistic: true