The SCD4x CO2 gadget is a simple reference design PCB that demonstrates the outstanding
performance and ease of use of Sensirion's SCD4x CO2 sensor product line. It is equipped with an LED
that indicates indoor air quality based on the measured CO2 concentration. It also features a Bluetooth
Low Energy module that enables communication with Bluetooth Low Energy (BLE) enabled devices such as
smartphones. Power is supplied via a standard USB interface.
