apdu

I am doing an EMV application on Android OS (Samsung Galaxy). I am able to send several APDU commands without problem but when I am trying to send the internal authentication command. I have this error : Tag lost. Have you got any idea concerning the purpose of this error ? I am not an experimented developer on Android, It may I have forgotten some stuff. the command is correct. I can replace by another command, it works (I mean I can recover a response). In which cases a NFC communication can be broken on Android? Here, you can see my problem when the command is sent : D/ECInfoGrabber(14088):

I want to route APDUs I get from an NFC Reader to the SIM Card. According to the HCE documentation I thought it would be possible simply by creating an OffHostApduService with the according routing-entries (which I did). Sadly, the SIM does not seem to get any APDUs. SELECT-Commands that work when the SIM is directly attached to my workstation by a SIM-Reader return with 6a82 (File not found). In LogCat I found two interesting bits of information: Every time I shoot a select command which should be routed to the SIM, I get these entries: 01-14 10:44:18.501: D/BrcmNfcJni(1009): RoutingManager:

I have selected application ( A0000000032010 ) on Visa contactless card and when I issue GPO command: "80A8000002830000" I get error: 67 00 Does anyone have idea what can be causing this? Michael Roland You receive that error code because you are sending an invalid GET PROCESSING OPTIONS command. In response to the application selection, you received the following PDOL: 9F38 0E (Processing Options Data Object List (PDOL)) 9F6604 (Terminal Transaction Qualifiers (TTQ)) 9F0206 (Amount, Authorized (Numeric)) 9F3704 (Unpredictable Number) 5F2A02 (Transaction Currency Code) 9A03 (Transaction Date)

I want get the UID of the Mifare Ultralight NFC tag. In Java I have this code: TerminalFactory factory = TerminalFactory.getDefault(); List<CardTerminal> terminals = factory.terminals().list(); System.out.println("Terminals: " + terminals); CardTerminal terminal = terminals.get(0); Card card = terminal.connect("*"); System.out.println("card: " + card); CardChannel channel = card.getBasicChannel(); ResponseAPDU answer = channel.transmit(new CommandAPDU(0xFF, 0xCA, 0x00, 0x00, 0x00)); byte[] uid = answer.getBytes(); The problem is that I receive two bytes and not the UID. What's the problem? Is