lib/lib_i2c/arduino-i2c-scd30/README.md
This is the Sensirion SCD30 library for Arduino allowing you to communicate with a SCD30 sensor over I²C.
Click here to learn more about the Sensirion SCD30 sensor.
The default I²C address of SCD30 is 0x61.
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 Sensirion 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
Use the following pin description to connect your SCD30 to the standard I²C bus of your Arduino board:
| Pin | Cable Color | Name | Description | Comments |
|---|---|---|---|---|
| 1 | red | VDD | Supply Voltage | 3.3V 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 |
The recommended voltage is 3.3V.
You will find pinout schematics for recommended board models below:
<details><summary>Arduino Uno</summary> <p>| SCD30 | SCD30 Pin | Cable Color | Board Pin |
|---|---|---|---|
| VDD | 1 | red | 3.3V |
| GND | 2 | black | GND |
| SCL | 3 | yellow | D19/SCL |
| SDA | 4 | green | D18/SDA |
| RDY | 5 | ||
| PWM | 6 | ||
| SEL | 7 | blue | GND |
| SCD30 | SCD30 Pin | Cable Color | Board Pin |
|---|---|---|---|
| VDD | 1 | red | 3.3V |
| GND | 2 | black | GND |
| SCL | 3 | yellow | A5 |
| SDA | 4 | green | A4 |
| RDY | 5 | ||
| PWM | 6 | ||
| SEL | 7 | blue | GND |
| SCD30 | SCD30 Pin | Cable Color | Board Pin |
|---|---|---|---|
| VDD | 1 | red | 3.3V |
| GND | 2 | black | GND |
| SCL | 3 | yellow | ~D3/SCL |
| SDA | 4 | green | D2/SDA |
| RDY | 5 | ||
| PWM | 6 | ||
| SEL | 7 | blue | GND |
| SCD30 | SCD30 Pin | Cable Color | Board Pin |
|---|---|---|---|
| VDD | 1 | red | 3.3V |
| GND | 2 | black | GND |
| SCL | 3 | yellow | D21/SCL |
| SDA | 4 | green | D20/SDA |
| RDY | 5 | ||
| PWM | 6 | ||
| SEL | 7 | blue | GND |
| SCD30 | SCD30 Pin | Cable Color | Board Pin |
|---|---|---|---|
| VDD | 1 | red | 3V3 |
| GND | 2 | black | GND |
| SCL | 3 | yellow | GPIO 22 |
| SDA | 4 | green | GPIO 21 |
| RDY | 5 | ||
| PWM | 6 | ||
| SEL | 7 | blue | GND |
Install the libraries and dependencies according to Installation of the library
Connect the SCD30 sensor to your Arduino as explained in Connect the sensor
Open the exampleUsage sample project within the Arduino IDE:
File ➔ Examples ➔ Sensirion I2C SCD30 ➔ exampleUsage
Click the Upload button in the Arduino IDE or Sketch ➔ Upload
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 used tool has to be set to 115200 baud.
Contributions are welcome!
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. :
softReset():
After using the softReset() function on an Arduino MKR WIFI 1010, subsequent commands are no longer acknowledged.
The I2C line remains low after receiving the first command byte.
To make the provided example work on the Arduino MKR WIFI 1010, the call to softReset() and the subsequent delay() can be removed.
See LICENSE.