But his final iteration was to make a standalone reader with an Arduino and use WebUSB to connect ... a short-range solution so barcodes and QR codes were out. He also decided against RFID but ...

It can be connected to via the male USB connector, or via the four connector pads on the back of the circuit board. If you pledge towards this campaign, you’ll receive the Arduino code ...

The card reader can be used two further ... which means that you can easily mess with the code as you see fit. You can connect your Arduino to the FTDI lines for quick programming, or you can ...

The best way to describe Arduino is ... tortillas with a QR code. QR codes are inexpensive for you to set up and easy for your customers to use. Search “QR code reader” in Google for ...