Resources For more information about the SparkFun Indoor Air Quality Sensor - SCD41, SEN55 (Qwiic), take a look at the resources and documentation below: Schematic KiCad Files Board Dimensions GitHub Hardware Repo SEN55 Datasheet SCD4x Datasheet SparkFun SCD4x Arduino Library Sensirion Arduino Core Library Sensirion SEN5x Arduino Library Qwiic Resource Page