Hallo,

seems as if my previous message never arrived in this thread...

> Can you tell me, will communicating through IsoDep still allow me to
> retrieve data like the track2 data from credit cards, assuming I know
> the protocols to use?

Current PayPass cards are EMV-compliant. Therefore, you will want to use
IsoDep and not NFcA/NfcB. The EMV protocol is based on APDUs (smartcard
commands according to ISO/IEC 7816-4)

IsoDep (although the name would suggest the Data Exchange Protocol
according to ISO/IEC 18092) provides APDU-based access to the
contactless smartcard (i.e. access on top of ISO/IEC 14443-4 protocol).
NfcB (and NfcA) provide access to contactless cards that do not support
ISO/IEC 14443-4 (i.e. cards that use proprietary protocols according to
ISO/IEC 14443-3).

br,
Michael

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