Python I2C Driver for Sensirion SCD30

This repository contains the Python driver to communicate with the Sensirion SCD30 sensor over I2C.

Click here to learn more about the Sensirion SCD30 sensor.

The default I²C address of SCD30 is 0x61.

Usage

See user manual at https://sensirion.github.io.

Detaild sensor pinout

Pin	Cable Color	Name	Description	Comments
1	red	VDD	Supply Voltage	3.3 to 5.5V
2	black	GND	Ground
3	yellow	SCL	I2C: Serial clock input
4	green	SDA	I2C: Serial data input / output
5		RDY	High when data is available	do not connect
6		PWM		do not connect
7	blue	SEL	Interface select	Pull to ground or floating for I2c

Development

We develop and test this driver using our company internal tools (version control, continuous integration, code review etc.) and automatically synchronize the master branch with GitHub. But this doesn't mean that we don't respond to issues or don't accept pull requests on GitHub. In fact, you're very welcome to open issues or create pull requests :)

Check coding style

The coding style can be checked with flake8:

pip install -e .[test]  # Install requirements
flake8                  # Run style check

In addition, we check the formatting of files with editorconfig-checker:

pip install editorconfig-checker==2.0.3   # Install requirements
editorconfig-checker                      # Run check

Run tests

Unit tests can be run with pytest:

pip install -e .[test]                       # Install requirements
pytest -m "not needs_device"                 # Run tests without hardware
pytest                                       # Run all tests
pytest -m "needs_device"  # Run all tests for SPS6x

The tests with the marker needs_device have following requirements:

• The SCD30 sensor must be connected to a SensorBridge on port 1.
• Pass the serial port where the SensorBridge is connected with --serial-port, e.g. pytest --serial-port=COM7
• The SensorBridge must have default settings (baudrate 460800, address 0)

Build documentation

The documentation can be built with Sphinx:

python setup.py install                        # Install package
pip install -r docs/requirements.txt           # Install requirements
sphinx-versioning build docs docs/_build/html  # Build documentation

License

See LICENSE.