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)
})

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