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AQI LCD

This is an app for the Wemos-based TFT display, presenting the pollution level:

(photo: nettigo.pl)

Configuration

When the device starts, it creates a wifi network, called AQI LCD. Please connect to it, to configure the wifi network and the sensor URL. For now, two sensor types are supported:

  • AQI_ECO - reads the JSON from the aqi.eco, eg. https://smolna.aqi.eco/13b/data.json,
  • LOCAL_DEVICE - reads data from a local, Sensor.Community sensor. The URL looks like this: http://192.168.0.130/data.json.

After saving the configuration, the device will be connected to the configured network.

Resetting configuration

Hitting the "Reset" button twice will reset the device in AP mode, creating the AQI LCD network again.

Building

The project uses platformio.org. It can be build and uploaded with:

pio run -t upload -e lcd

Hardware

Hardware is available at the Nettigo's website: https://nettigo.pl/products/plytka-pcb-ekran-dotykowy-z-wifi-i-karta-sd-do-wemos-d1-mini

Alternative frontends

Neopixel LED frontend

AQI-LCD can be build in an alternative mode, in which the WS2812-based LED driver is used to display the pollution level:

pio run -t upload -e led

By default it assumes that a 60-LED strip is connected to the D4 pin on Wemos. It can be configured with the build flags set in the platformio.ini:

  -DLED_COUNT=60  # how many LEDs (ring=16, stripe=60)
  -DLED_PIN=2     # D4 on wemost
  -DBRIGHTNESS=25 # max: 255

LED matrix frontend

pio run -t upload -e led-matrix

Hardware info: https://easyeda.com/nettigo/aqi-led-board