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

• Repurpose an old USB LED light into something useful for the printer
• Use up some spare home automation components
• Design something nice looking

Reference

• Original ESP-01S Relay Case by engineers_alter_ego
• Self made remix:
  • Thingiverse: ESP-01S Relay LED Holder
  • Github: ESP-01S Relay LED Holder

Actions

• Remixed in TinkerCAD
  • Widened to house wires inside the box
  • Closed off terminal block holes
  • Added space for a Micro USB port
  • Measured and added a hollow cylinder to fit the LED light bar
  • Added base of cylinder to elimenate need for supports, looked good too
• Uploaded my new design to Thingiverse
• Added ESP-01S Relay (fitted perfectly into the design)
• Wired LED positive to relay N.O. position (circuit closes/completes when relay turned on)
• Wired in a Micro USB header board
• Hot glued everything in place
• Screwed into the back of the front left leg of the Slack Lack

Pictures

Observations

• Probably didn’t need a relay for the amount of current in question, but thought it best to save the ESP-01S from bearing the brunt
• Made wires a bit too short making wiring up the USB port difficult
• Hot glue under the relay board caused it to sit higher up and the lid didn’t close properly, next time ensure adequare pressure after applying hot glue to a well fitted part
• It worked quite well but the light source wasn’t particularly bright
• Resued something I might otherwise have thrown away

Code

ESPHome

switch:
  - platform: gpio
    id: gpio0
    pin:
      number: GPIO0
    name: "${friendly_name} Switch"
    icon: "mdi:desk-lamp"
    inverted: true

Home Assistant Automation

- id: 7b727468-ce4e-41fa-aee8-568b59afc31c
  alias: Printer Sync Light to Switch
  description: ''
  trigger:
    - platform: device
      type: turned_on
      device_id: 82ad57854a15ec84db03742933e390f5
      entity_id: switch.printer
      domain: switch
    - platform: device
      type: turned_off
      device_id: 82ad57854a15ec84db03742933e390f5
      entity_id: switch.printer
      domain: switch
  condition: []
  action:
    - choose:
        - conditions:
            - condition: state
              entity_id: switch.printer
              state: 'on'
          sequence:
            - type: turn_on
              device_id: 2c08f1586defd21fa7184b158ccb49a5
              entity_id: switch.printer_light_switch
              domain: switch
      default:
        - type: turn_off
          device_id: 2c08f1586defd21fa7184b158ccb49a5
          entity_id: switch.printer_light_switch
          domain: switch
  mode: single