// The SCD30 from Sensirion is a high quality Nondispersive Infrared (NDIR) based CO₂ sensor capable of detecting 400 to 10000ppm with an accuracy of ±(30ppm+3%).
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[*SparkX CO₂ Humidity and Temperature Sensor - SCD30 (SPX-14751)*](https://www.sparkfun.com/products/14751)
The SCD30 from Sensirion is a high quality [NDIR](https://en.wikipedia.org/wiki/Nondispersive_infrared_sensor) based CO₂ sensor capable of detecting 400 to 10000ppm with an accuracy of ±(30ppm+3%). In order to improve accuracy the SCD30 has temperature and humidity sensing built-in, as well as commands to compensate for altitude.
We've written an Arduino library to make reading the CO₂, humidity, and temperature very easy. It can be downloaded through the Arduino Library manager: search for 'SparkFun SCD30'. We recommend using a [Qwiic Breadboard Cable](https://www.sparkfun.com/products/14425) to connect the SCD30 to a Qwiic compatible board. The Ye*LL*ow wire goes in the SC*L* pin. The SCD30 also supports a serial interface but we haven't worked with it.
The CO₂ sensor works very well and for additional accuracy the SCD30 accepts ambient pressure readings. We recommend using the SCD30 in conjunction with the [Qwiic Pressure Sensor - MS5637](https://www.sparkfun.com/products/14688) or the [Qwiic Environmental Sensor - BME680](https://www.sparkfun.com/products/14570) to obtain the current barometric pressure.
Note: The SCD30 has an automatic self-calibration routine. Sensirion recommends 7 days of continuous readings with at least 1 hour a day of 'fresh air' for self-calibration to complete.
Library written by Nathan Seidle ([SparkFun](http://www.sparkfun.com)).
Thanks to!
*[jobr97](https://github.com/jobr97) for adding the getTemperatureOffset() method
*[bobobo1618](https://github.com/bobobo1618) for writing a CRC check and improving the return values of the library
*[labeneator](https://github.com/labeneator) for adding method to disable calibrate at begin
*[AndreasExner](https://github.com/AndreasExner) for adding [reset and getAutoSelfCalibration methods](https://github.com/sparkfun/SparkFun_SCD30_Arduino_Library/pull/17)
*[awatterott](https://github.com/awatterott) for adding [getAltitudeCompensation()](https://github.com/sparkfun/SparkFun_SCD30_Arduino_Library/pull/18)
*[jogi-k](https://github.com/jogi-k) for adding [teensy i2clib](https://github.com/sparkfun/SparkFun_SCD30_Arduino_Library/pull/19) support
*[paulvha](https://github.com/paulvha) for the suggestions and corrections in [his version of the library](https://github.com/paulvha/scd30)
*[yamamaya](https://github.com/yamamaya) for the [3ms delay](https://github.com/sparkfun/SparkFun_SCD30_Arduino_Library/pull/24)
Repository Contents
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***/examples** - Example sketches for the library (.ino). Run these from the Arduino IDE.
***/src** - Source files for the library (.cpp, .h).
***keywords.txt** - Keywords from this library that will be highlighted in the Arduino IDE.
***library.properties** - General library properties for the Arduino package manager.
Documentation
--------------
***[Installing an Arduino Library Guide](https://learn.sparkfun.com/tutorials/installing-an-arduino-library)** - Basic information on how to install an Arduino library.
License Information
-------------------
This product is _**open source**_!
Please use, reuse, and modify these files as you see fit. Please maintain attribution to SparkFun Electronics and release anything derivative under the same license.
sentence=Library for the Sensirion SCD30 CO2 Sensor
paragraph=An Arduinolibrary for the SCD30 CO2 sensor from Sensirion. The SCD30 is a high quality <a href="https://en.wikipedia.org/wiki/Nondispersive_infrared_sensor">NDIR</a> based CO₂ sensor capable of detecting 400 to 10000ppm with an accuracy of ±(30ppm+3%). In order to improve accuracy the SCD30 has temperature and humidity sensing built-in, as well as commands to set the current altitude.<br><br>Get the SCD30 <a href="https://www.sparkfun.com/products/14751">here</a>.
