Android HCE Help

[alexroan]

I'm using this example Android app to emulate using HCE, and using an acr122u NFC reader.

The android app essentially emulates a card with an "account number" which is typed in on the app. Here is the configuration of the emulation:

    private static final String TAG = "CardService";
    // AID for our loyalty card service.
    private static final String SAMPLE_LOYALTY_CARD_AID = "F222222222";
    // ISO-DEP command HEADER for selecting an AID.
    // Format: [Class | Instruction | Parameter 1 | Parameter 2]
    private static final String SELECT_APDU_HEADER = "00A40400";
    // "OK" status word sent in response to SELECT AID command (0x9000)
    private static final byte[] SELECT_OK_SW = HexStringToByteArray("9000");
    // "UNKNOWN" status word sent in response to invalid APDU command (0x0000)
    private static final byte[] UNKNOWN_CMD_SW = HexStringToByteArray("0000");
    private static final byte[] SELECT_APDU = BuildSelectApdu(SAMPLE_LOYALTY_CARD_AID);

Running examples/basic.js with autoprocessing=true returns this error:

I'm assuming that I should approach with autoprocessing off, and using reader.transmit to retrieve the data, but I'm unsure as to how to move forward with the correct commands. Would you be able to help?

[alexroan]

Turns out it was a case of removing the LE data from the transmission which solved it!