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airQuality

This package adds functionality to the CCS811 board. Based in the work of ADataDate

Usage

  • The CCS811 Air Quality Sensor can be directly mated to the matching pins (I2C) of the SAMD21 system.
  • I2C is set up so the user needs to start the device, then read the data.
  • The CCS811 sensor takes 20 minutes to burn-in or get meaningful data.
  • The TVOCs are presented as number between 0ppb to 1187ppb.
  • The eCO2 (equivalent CO2) is presented as a number between 400ppm to 8192ppm.

Pins Used

  • -- I2C - SCL
  • -- I2C - SDA

Air Quality Data

The CCS811 air quality sensors communicates via I2C. The data returned as a number can be stored in a variable, displayed on the 5x5 LED Matrix or sent serially to OpenLog.

  • |Read eCO2|block reads the equivalent CO2 and can be any number between 400ppm and 8182ppm.
  • |Read TVOCs|block reads the total organic volatile compounds and can be any number between 0ppb to 1187ppb.
  • |Device Error|block is used while troubleshooting otherwise don't use it. It will return a number corresponding to a specific error on the CCS811.
  • |Device Status|block is used while troubleshooting otherwise don't use it.
  • |HWID|block is used to test the most basic read on the I2C line. Use if you are having probelms establishing communication.

Example Project:

The following project will read the eCO2 and TVOCs data.

let eCO2 = 0
let TVOCs = 0
loop.forever(() => {
    TVOCs = airQuality.readTvoc()
    eCO2 = airQuality.readCo2()
    loop.pause(1000)
})

MakerCode Microbit

Maintainer

Electronic Cats invests time and resources providing this open source design, please support Electronic Cats and open-source hardware by purchasing products from Electronic Cats!

License

MIT

Supported targets

  • for PXT/maker
airQuality