Air Quality Index LED Display

Display the PurpleAir AQI (Air Quality Index) on a RGB LED via Raspberry Pi Pico W.

The code will use the PurpleAir API to periodically query PM2.5 (AQI) data from a specified sensor. The RGB LED will change color depending on the reading of the sensor. This can be useful for monitoring the outside air quality near your house, for example.

Usage

• Configure the hardware as illustrated in the schematic below.
• Modify the required constants in config.py.
• Deploy code to the Pico W.

Schematic

Potential Future Improvements

• Provide a web interface for changing the PurpleAir Station ID, to allow modifying the monitored station/sensor without having to deploy code.
• Send an alert (SMS, email) if AQI exceeds a specified level.