Using the SCD30 is a breeze. First, connect it to a Qwiic - compatible board with a Qwiic Breadboard Cable. Make sure to put the yellow wire in the SCL pin. To read the CO₂, humidity, and temperature data, download our Arduino library through the Arduino Library manager by searching for 'SparkFun SCD30' or from the provided link. For better accuracy, you can pair it with the Qwiic Pressure Sensor - MS5637 or the Qwiic Environmental Sensor - BME680 to get the current barometric pressure. Regarding self - calibration, let it take continuous readings for 7 days, with at least 1 hour a day of fresh air. Remember, SparkX products are experimental. They've been tested, but there are no guarantees and no live technical support. If you run into any issues or have questions, head over to our forum. Also, since we don't regularly stock all SparkX products, get yours while it's available.