CircuitPython library for Sensirion SGP30 gas sensor with eCO2 and TVOC.
Project description
Introduction
A CircuitPython driver for the Sensirion SGP30 gas sensor with eCO2 and TVOC output. This sensor uses I2C!
Dependencies
This driver depends on:
Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.
Usage Notes
See the guide for wiring and installation instructions.
First, import the library:
import busio
import adafruit_sgp30Next, initialize the I2C bus object:
from board import *
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:
sgp30 = adafruit_sgp30.Adafruit_SGP30(i2c_bus)Reading from the Sensor
To read from the sensor:
co2eq, tvoc = sgp30.iaq_measure()
print("CO2eq = %d ppm \t TVOC = %d ppb" % (co2eq, tvoc))Contributing
Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.
Building locally
To build this library locally you’ll need to install the circuitpython-build-tools package.
python3 -m venv .env
source .env/bin/activate
pip install circuitpython-build-toolsOnce installed, make sure you are in the virtual environment:
source .env/bin/activateThen run the build:
circuitpython-build-bundles --filename_prefix adafruit-circuitpython-sgp30 --library_location .Sphinx documentation
Sphinx is used to build the documentation based on rST files and comments in the code. First, install dependencies (feel free to reuse the virtual environment from above):
python3 -m venv .env
source .env/bin/activate
pip install Sphinx sphinx-rtd-themeNow, once you have the virtual environment activated:
cd docs
sphinx-build -E -W -b html . _build/htmlThis will output the documentation to docs/_build/html. Open the index.html in your browser to view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to locally verify it will pass.
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