rfid.py

#!/usr/bin/env python

import serial, sys

DEVICE='/dev/cu.usbserial-A7006gOH'
IDS={
    '28001D71E1': 'Ross',
    '0800D9D1AB': 'Steve',
}

def puts(msg):
    sys.stdout.write(msg + "\n")
    sys.stdout.flush()

def rfid_reader():
    puts("Opening " + DEVICE)
    ser=serial.Serial(DEVICE, 2400, timeout=1)
    try:
        while ser.isOpen():
            data=ser.readline()
            id=IDS.get(data[:-1], False)
            if id: yield id
    except KeyboardInterrupt:
        ser.close()
        return

if __name__ == "__main__":
    for id in rfid_reader():
        puts("Hello, %s" % id)