BarCode Scanner Interfacing with Arduino + USB Host Shield Module + 16x2 LCD Display - YouTube
Barcode/QR Code Reader using Arduino & QR Scanner Module
Amazon.com: USB Data Sync Cable Connect The Microcontroller to PC or Mac for Arduino UNO(A000066) Arduino Mega 2560(A000067) Rev 3 R3 Generic ATmega328P/ATmega2560 : Electronics
arduino uno - Reading from ps2 barcode scanner - Arduino Stack Exchange
Why I cannot receive data from USB to arduino when I connect direct from TX and RX arduino to TX and RX USB (D+ and D-) - Stack Overflow
QR Code/Barcode Scanner using Arduino & QR scanner module – Circuit Schools