Using FTDI drivers to input serial data from RFID readers to the linux machine.
Link to FTDI drivers: http://www.ftdichip.com/Drivers/VCP.htm
Serial port can be seen in /dev directory.
For Macs: By running "ls /dev/ | grep cu", you can get the serial port of the RFID. For Raspberry Pi: The Serial port is usually "TTYUSB0"
Install the PySerial library (pip install PySerial)