FnordCredit RFID-Reader

Adds support for user authentication using RFID Tag UIDs to FnordCredit

Hardware

This Project uses an Arduino Pro Micro (ATmega32u4) as its microcontroller due to it being cheap and having hardware USB support. As the RFID reader the more expensive PN532 is used due to better software support and broader tag compatibility.

In the future a seperate build with support for the MFRC522 is planned.

Wiring

The PN532 is connected with the Pro Micro using its native SPI peripheral pins (14 [MISO], 16[MOSI], 15[SCK], 10[CS]).

Software

This Project was written in C/C++ using the Arduino IDE.

It uses the Adafruit PN532 library for accessing the RFID reader. For parsing the results to FnordCredit it uses the integrated Arduino Keyboard library.

The Programm reads the 4 or 7 bit long UID of the RFID tag and parses it to FnordCredit by first sending [LEFT_ALT + T] on the keyboard then printing out the UID in HEX followed by a [RETURN].

Flashing

The programm can be flashed to the microcontroller using avrdude with the provided precompiled binary. The following terminal command can be used: avrdude -p m32U4 -P /dev/ttyACM0 -c avr109 -U flash:w:FnordCredit_RFID.hex You may have to replace /dev/ttyACM0 with your correspondig serial port.

If you want to compile it yourself, just clone this repository and open the .inousing the Arduino IDE. In the Boardmanager select the Arduino Leonardoand your serial port.