Adafruit CircuitPython CCS811 Library

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CircuitPython driver for the CCS811 air quality sensor <https://www.adafruit.com/product/3566>_.

Dependencies

This driver depends on:

• Adafruit CircuitPython <https://github.com/adafruit/circuitpython>_
• Bus Device <https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>_
• Register <https://github.com/adafruit/Adafruit_CircuitPython_Register>_

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>_.

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI <https://pypi.org/project/adafruit-circuitpython-ccs811/>_. To install for current user:

.. code-block:: shell

pip3 install adafruit-circuitpython-ccs811

To install system-wide (this may be required in some cases):

.. code-block:: shell

sudo pip3 install adafruit-circuitpython-ccs811

To install in a virtual environment in your current project:

.. code-block:: shell

mkdir project-name && cd project-name
python3 -m venv .venv
source .venv/bin/activate
pip3 install adafruit-circuitpython-ccs811

Usage Notes

See the guide <https://learn.adafruit.com/adafruit-ccs811-air-quality-sensor/python-circuitpython>_ for wiring and installation instructions.

Of course, you must import the library to use it:

.. code:: python

import busio
import adafruit_ccs811

Next, initialize the I2C bus object.

.. code:: python

from board import *
i2c = board.I2C()   # uses board.SCL and board.SDA

Once you have created the I2C interface object, you can use it to instantiate the CCS811 object

.. code:: python

ccs =  adafruit_ccs811.CCS811(i2c)

Reading Sensor

To read the gas sensor simply read the attributes:

.. code:: python

print("CO2: ", ccs.eco2, " TVOC:", ccs.tvoc)

Documentation

API documentation for this library can be found on Read the Docs <https://docs.circuitpython.org/projects/ccs811/en/latest/>_.

For information on building library documentation, please check out this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>_.

Contributing

Contributions are welcome! Please read our Code of Conduct <https://github.com/adafruit/Adafruit_CircuitPython_CCS811/blob/main/CODE_OF_CONDUCT.md>_ before contributing to help this project stay welcoming.