Sensirion I2C SCD30 Arduino Library

This document explains how to set up a SCD30 sensor to run on a Arduino

Click here to learn more about the Sensirion SCD30 sensor.

The default I²C address of SCD30 is 0x61.

Setup Guide

Connecting the Sensor

Your sensor has the 5 different pins you need to connect to your Arduino Board: VDD, GND, SCL, SDA, SEL. Use the following pins to connect your SCD30:

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

You can find the pinout for specific boards under following links:

• Arduino Uno
• Arduino Nano
• Arduino Micro
• Arduino Mega 2560
• ESP32 DevKitC

Installation of Arduino

This library can be installed using the Arduino Library manager: Start the Arduino IDE and open the Library Manager via

Sketch => Include Library => Manage Libraries...

Search for the Sensririon I2C SCD30 library in the Filter your search... field and install it by clicking the install button.

If you cannot find it in the library manager, download the latest release as .zip file and add it to your Arduino IDE via

Sketch => Include Library => Add .ZIP Library...

Don't forget to install the dependencies listed below the same way via library manager or Add .ZIP Library

Dependencies

• Sensirion Core

Quick Start

1. Connect the SCD30 Sensor to your Arduino board's standard I2C bus. Check the pinout of your Arduino board to find the correct pins. The pinout of the SCD30 Sensor is described above.

   The recommended voltage is 3.3V.

2. Open the exampleUsage sample project within the Arduino IDE via the application menu

    File => Examples => Sensirion I2C SCD30 => exampleUsage
   

3. Click the Upload button in the Arduino IDE or

    Sketch => Upload
   

4. When the upload process has finished, open the Serial Monitor or Serial Plotter via the Tools menu to observe the measurement values. Note that the Baud Rate in the corresponding window has to be set to 115200 baud.

Contributing

Contributions are welcome!

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 :)

This Sensirion library uses clang-format to standardize the formatting of all our .cpp and .h files. Make sure your contributions are formatted accordingly:

The -i flag will apply the format changes to the files listed.

clang-format -i src/*.cpp src/*.h

Note that differences from this formatting will result in a failed build until they are fixed.

License

See LICENSE.