Summary

A python 3 script designed to work with the RaspberryPi, Enviro + Air Quality Hat, and Particulate Matter Sensor

Materials

• I used a Raspberry Pi Zero W. If you'd prefer not to solder the header use the Raspberry Pi Zero WH. Any Pi with a 40-pin male GPIO header should work fine.
• A microSD card with Raspberry Pi OS.
• Enviro + Air Quality for Raspberry Pi
• PMS5003 Particulate Matter Sensor

Software

I'm using Python 3.7.3. After setting up the hardware I installed the Python packages supplied by Pimoroni. They supply a one-line installer but I didn't use it. I did the following:

git clone https://github.com/pimoroni/enviroplus-python
cd enviroplus-python
sudo ./install.sh

I also had to install some packages manually. I don't remember exactly which were installed manually but here's a summary of what I used:

• ST7735 (for writing on the LCD screen)
• psutil (for accessing memory and CPU load)
• gpiozero (for accessing CPU temperature)
• smbus2 and bme280 (for reading the humidity and pressure sensors)
• enviroplus (for reading the gas sensor)
• pms5003 (for reading the air quality sensors)

Usage

Once everything is set up just run the script:

python3 runEnviroPi.py

I used the following cron job to schedule the script to run when the Pi boots:

@reboot Python3 /home/pi/EnviroPi/runEnviroPi.py

References

• An outdoor air quality station with Enviro+ and Luftdaten: A guide written by Sandy Macdonald (hosted on Pimoroni) discussing how to set up and use the hardware.
• enviroplus-python: The github repository contains many helpful examples.