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

• ESP-01S node for kids bedroom
• Button to activate hallway light at night
• Temp/humidity sensing would be good too

References

P1030 • 25 Point Solderless Breadboard Pack 7https://www.altronics.com.au/p/p1030-25-way-breadboards-pk7/

Actions

• Project box from Altronics
• Mini breadboards from Altronics
• Kid chose buttons wired in parallel
• Drilled out room for the DHT11 to protrude
• Drilled out room for buttons
• Bent DHT11 to protrude from housing
• Hot glued ESP-01S relay board and buttons in place
• Used DuPont wires to set up the breadboard
• Used the Frenck trick to get an extra GPIO from the ESP-01S
• Mounted near bed with 3M detachable adhesives
• Cut a broken ESP-01S to reduce the size of the cable hole, and hot glued that in place
• Soldered the +/- from an old iPhone charger to the DuPont wires to make the voltage rails in the breadboard

Pictures

Code

sensor:
  - platform: dht
    pin: GPIO2
    temperature:
      name: "${friendly_name} Temperature"
      filters:
        - offset: -5
    humidity:
      name: "${friendly_name} Humidity"
      filters:
        - offset: 13
    update_interval: 60s

binary_sensor:
  - platform: gpio
    id: gpio0
    name: "${friendly_name} Button"
    pin:
      number: GPIO0
      inverted: true
    filters:
      - delayed_on: 25ms
      - delayed_off: 30s

Observations

• DHT11 difficult to calibrate/tune
• Filters on buttons made effective ‘timeout’ preventing over-use of button
• Soldering of buttons sans flux caused green button light to stop working
• Hard wiring was best known at the time, but in retrospect a micro USB port could have been more elegant
• Drilling out neat holes was difficult, step drill bit bought much after the fact would have been perfect