The SCD41 sensor includes an automatic self-calibration routine that adjusts to its sensing environment over a seven-day calibration period. For best results, Sensirion recommends taking continuous readings for at least one hour a day of 'fresh air' for the calibration period to complete. The SCD4X sensors also offer a one-shot measurement option for optimal reduction in power consumption.
SparkFun has developed an Arduino library to simplify reading the CO2, humidity, and temperature data from the sensor. The library can be easily downloaded through the Arduino Library manager by searching for 'SparkFun SCD4x'.
The SparkFun Qwiic Connect System is an ecosystem of I2C sensors, actuators, shields, and cables designed to make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector, reducing the amount of required PCB space and ensuring polarized connections for error-free hook up.
The SparkFun SCD4x CO2 sensor comes with a range of features including an I2C interface, a supply voltage range of 2.4-5.5V (3.3V typical), and low current consumption. It also includes Sensirion's PASens Technology and CMOSens Technology, a CO2 output range of 0-40,000ppm, and a humidity range of 0-100%RH. The sensor operates within a temperature range of -10°C-60°C and offers temperature accuracy of ±1.5 (Full Range).
Additional resources including the schematic, Eagle Files, board dimensions, hookup guide, datasheet, and Arduino library can be found on the SparkFun website. These resources provide detailed information about the sensor and step-by-step instructions for using it in your projects.