Read an unique ID from RFID card in Python
I have an OmniKey 5321 SmartCard reader, and a PC with Debian. The following Python code reads the cards:
from smartcard.CardMonitoring import CardMonitor, CardObserver from smartcard.util import * import sys class printobserver( CardObserver ): def update( self, observable, (addedcards, removedcards) ): for card in addedcards: print "+Inserted: ", toHexString( card.atr ) for card in removedcards: print "-Removed: ", toHexString( card.atr ) try: print "Insert or remove a smartcard in the system." print "" cardmonitor = CardMonitor() cardobserver = printobserver() cardmonitor.addObserver( cardobserver ) raw_input('Press Enter to exit\n') except: print "Unexpected error: ", sys.exc_info()
The Python code runs fine, but gives me back the same atr tag for many cards. The given atr is:
3B 8F 80 01 80 4F 0C A0 00 00 03 06 03 00 01 00 00 00 00 6A
How can I read something uniqe from the cards? I've understand that I have to send some commands, and the replies will contains the UID, but how can I find the commands? How will I send them?
Once you connected to the card (or actually the reader), you can send the PC/SC standardized command for getting the card UID from the reader:
FF CA 00 00 00