The custom PCB is intended for connection to a NUCLEO-L476RG (STMicroelectronics) development board. However, other boards may also be compatible.
The board consists primarily of an ADC [2] and a socket for the mini spectrometer and is more or less a breakout board that has to be plugged onto the Nucleo board.
We provide firmware for the NUCLEO-L476RG in a separate repository [1], it drives the sensor and offers a command line interface (UART) to control the system.
[2] AD7671, Analog Devices Inc