An adaptation of https://github.com/Notthemarsian/CCS811 to allow you to connect a CCS811 indoor air quality sensor to the BBC micro:bit to print eCO2 and TVOC (total volatile organic compound) readings to a serial console over USB.
I've also added a version that is a self-contained air quality sensor with an OLED display.
Go to http://www.suppertime.co.uk/blogmywiki/2021/09/ccs811-air-quality-sensor-microbit/ for more information on how to wire and use it.
