https://twitter.com/TathamOddie/status/1289018046384766976

automations.yaml

- alias: Notify when gate buzzing
  trigger:
  - entity_id: binary_sensor.gate_buzzer
    from: 'off'
    platform: state
    to: 'on'
  condition: []
  action:
  - service: notify.everyone
    data:
      message: 👋 Somebody is at the gate
      data:
        tag: gate_buzz
        channel: Gate Buzz
        importance: high
        actions:
          - action: open_gate
            title: Open Gate

- alias: Actionable notification - Open Gate
  trigger:
  - platform: event
    event_type: mobile_app_notification_action
    event_data:
      action: open_gate
  action:
    - service: switch.turn_on
      data:
        entity_id: switch.gate_latch
    - service: notify.everyone
      data:
        message: 🔓 Gate opened
        data:
          tag: gate_open
          channel: Gate Open
          importance: high
          timeout: 10

intercom.yaml

esphome:
  name: intercom
  platform: ESP8266
  board: esp01_1m

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  power_save_mode: none

logger:
  level: verbose

api:
  password: !secret esphome_secret

ota:
  password: !secret esphome_secret

sensor:
  - platform: uptime
    name: Intercom Uptime

  - platform: wifi_signal
    name: Intercom Signal

switch:
  - platform: gpio
    pin: GPIO0
    id: relay
    name: Gate Latch
    inverted: true
    icon: "mdi:gate"
    on_turn_on:
      - delay: 10s
      - switch.turn_off: relay

binary_sensor:
  - platform: gpio
    pin: GPIO2
    name: "Gate Buzzer"
    filters:
      - invert:
      - delayed_off: 250ms