CircuitPython library for the Adafruit SGP40 Air Quality Sensor / VOC Index Sensor Breakouts
Project description
Introduction
CircuitPython library for the Adafruit SGP40 Air Quality Sensor / VOC Index Sensor Breakouts
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.
Installing from PyPI
On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:
pip3 install adafruit-circuitpython-sgp40To install system-wide (this may be required in some cases):
sudo pip3 install adafruit-circuitpython-sgp40To install in a virtual environment in your current project:
mkdir project-name && cd project-name
python3 -m venv .env
source .env/bin/activate
pip3 install adafruit-circuitpython-sgp40Usage Example
import time
import board
import adafruit_sgp40
i2c = board.I2C() # uses board.SCL and board.SDA
sgp = adafruit_sgp40(i2c)
while True:
print("Measurement: ", sgp.raw)
print("")
sleep(1)For humidity compensated raw gas readings, we’ll need a secondary sensor such as the bme280
import time
import board
import adafruit_sgp40
import adafruit_bme280
i2c = board.I2C() # uses board.SCL and board.SDA
sgp = adafruit_sgp40.SGP40(i2c)
bme280 = adafruit_bme280.Adafruit_BME280_I2C(i2c)
while True:
temperature = bme280.temperature
humidity = bme280.relative_humidity
compensated_raw_gas = sgp.measure_raw(temperature = temperature, relative_humidity = humidity)
print(compensated_raw_gas)
print("")
time.sleep(1)Contributing
Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.
Documentation
For information on building library documentation, please check out this guide.
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