Entropy Reduction

Personal log of yet another digital native.

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Project maintained by andre-abadi Hosted on GitHub Pages — Theme by mattgraham

Purpose

• Create a from-scratch, smart doorbell, ESPHome for Home Assistant integrations
• Finalise build log for Doorbell Actual, after starting on part 1 of the project

References

• First Post: Doorbell Actual
• TinkerCAD: doorbell-actual
• Printables: Doorbell
• AliExpress: Yamin electric store Metal Push Button - White, 40mm, 3-6V

Design Files

• doorbell-actual.stl

Actions

• Printed the STL face down
  • 0.6mm nozzle, 0.4mm layer height, 15% gyroid infill
• Soldered some DuPont socket cables to the Push Button
• Mounted the Push Button
  • Hole too small
  • Bastard file to widen hole by 0.5mm
• Wired up to the Push Button to a Wemos D1 Mini
• Tested using code from First Post: Doorbell Actual
• Code worked
• DuPont crimped a three wire socket and plug to 8m of CAT5e UTP (blue, green, brown)
• This meant that D1 Mini’s pinout necessitated using GND, D4, and D3 instead of GND, D1, and D2
• Rewrote code so that DuPont headers could be put onto the D1 Mini
• Desktop tests
  • 8m cable did not affect function (thankfully, had not been certain this would be the case)
  • Change in pins did not affect function
• Drilled a hole in external brickwork
• Chain down, pulled cable through to garage where USB power readily available
• Attached button to DuPont header on doorbell side
• Attached DuPont header to D1 Mini in enclosure on garage-side
• Function test succeeded
• Drilled screw holes for doorbell fixture
• Added roof silicone (leftover from previous project) to back of doorbell fixture for waterproofing
• Screwed in the fixture
• Further function test successful (flicker of light on press made this easy)
• Packed up
• Wrote automation (see Code section below)
• Everything worked!

Reflections

• Crimping DuPont is amazing, even with a set of pliers (thanks Joseph Prusa!)
• Crimping DuPont would be even more amazing with a crimper (bought a Engineer PAD-11 since)
• Design of doorbell fixture looks amazing
• Tested a strobe effect when button not pressed but it would only work after first press, and this seemed inelegant so was scrapped, but archived below

Pictures

Code

ESPHome

• Updated on-press strobe-effect timings
• Updated pins to suit headers off network cable

logger:
  logs:
    switch: INFO
switch:
  - platform: gpio
    pin: D4
    id: light
    name: "${friendly_name} Light"
    restore_mode: ALWAYS_ON
    internal: true

binary_sensor:
  - platform: gpio
    id: bin
    icon: mdi:radiobox-marked
    name: "${friendly_name} Button"
    #device_class: garage_door
    pin:
      number: D3
      inverted: true
      mode: INPUT_PULLUP
    filters:
      - delayed_off: 30s
    # automation when button is pressed
    on_press:
      - repeat:
          count: 15
          then:
            - switch.turn_off: light
            - delay: 50ms
            - switch.turn_on: light
      - switch.turn_off: light
    on_release:
      then:
        - switch.turn_on: light

Unused Un-Pressed Strobe

        
         slow strobe when not pressed,
         but only after first press
        
        - while:
            condition:
              binary_sensor.is_off: bin
            
            
            then:
              - switch.turn_off: light
              - delay: 100ms
              - switch.turn_on: light
              - delay: 1s
              

Automation

- id: '1651317777505'
  alias: Doorbell Actual
  description: Ring the doorbell at 25% after 6pm before 6am, otherwise 75%. Notify
    all apps if house unoccupied.
  trigger:
  - platform: state
    entity_id: binary_sensor.doorbell_actual_button
    to: 'on'
  condition: []
  action:
  - choose:
    - conditions:
      - condition: time
        before: '18:00:00'
        after: 06:00:00
      sequence:
      - service: media_player.volume_set
        data:
          volume_level: 0.75
        target:
          entity_id: media_player.living_room_speaker
    default:
    - service: media_player.volume_set
      data:
        volume_level: 0.35
      target:
        entity_id: media_player.living_room_speaker
  - service: media_player.play_media
    data:
      media_content_id: media-source://media_source/local/doorbell.mp3
      media_content_type: audio/mp3
    target:
      entity_id: media_player.living_room_speaker
  - choose:
    - conditions:
      - condition: state
        entity_id: binary_sensor.occupancy
        state: 'off'
        for:
          minutes: 5
      sequence:
      - service: notify.all_hass_apps
        data:
          data:
            clickAction: /lovelace-cctv/main
          title: 🔔 The Doorbell Rang
          message: Tap to see CCTV summary.
    default: []
  mode: single