Follow the assembly diagram to build your system

Download the 'ready to use Raspbian OS' on OSF : https://osf.io/5g4m8
(we recommend using V2 that include fixes)

Clone the 'Rpi_RaspbianOS_ReadyToUse_V2.img' from OSF to the mini SD card.

We recommend using 'Win32DiskImager' software on windows.

 
For linux, you can do :
sudo dd if=~/Rpi_RaspbianOS_ReadyToUse_V2.img of=PATH_TO_YOUR_MINISD bs=1M conv=fsync status=progress

Insert the miniSD card into the raspberry.

Create your USB protocol playframe.
For example, you can use this testing content :

copy-past on the USB key the folder 'Pyaudio_protocol' from the github repo :

https://github.com/Lx37/PyOpenProto/tree/master/USB_key_content_example