adafruit-circuitpython-sgp30

Introduction

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A CircuitPython driver for the Sensirion SGP30 gas sensor with eCO2 and TVOC output. This sensor uses I2C!

Installation and Dependencies

This driver depends on:

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

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-sgp30/>_. To install for current user:

.. code-block:: shell

pip3 install adafruit-circuitpython-sgp30

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

.. code-block:: shell

sudo pip3 install adafruit-circuitpython-sgp30

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-sgp30

Usage Notes

See the guide <https://learn.adafruit.com/adafruit-sgp30-gas-tvoc-eco2-mox-sensor/circuitpython-wiring-test>_ for wiring and installation instructions.

First, import the library:

.. code-block:: python

import busio
import adafruit_sgp30

Next, initialize the I2C bus object:

.. code-block:: python

import board
i2c_bus = busio.I2C(board.SCL, board.SDA, frequency=100000)

Since we have the I2C bus object, we can now use it to instantiate the SGP30 object:

.. code-block:: python

sgp30 = adafruit_sgp30.Adafruit_SGP30(i2c_bus)

Reading from the Sensor

To read from the sensor:

.. code-block:: python

eCO2, TVOC = sgp30.iaq_measure()
print("eCO2 = %d ppm \t TVOC = %d ppb" % (eCO2, TVOC))

Documentation

API documentation for this library can be found on Read the Docs <https://docs.circuitpython.org/projects/sgp30/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_sgp30/blob/main/CODE_OF_CONDUCT.md>_ before contributing to help this project stay welcoming.