PM3 Commands Reference (Iceman Firmware):

Main Help

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Current command:
hf 14a ndefread --help

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Read NFC Data Exchange Format (NDEF) file on Type 4 NDEF tag

usage:
    hf 14a ndefread [-hv] [-f <fn>]

options:
    -h, --help                     This help
    -f, --file <fn>                save raw NDEF to file
    -v, --verbose                  verbose output

examples/notes:
    hf 14a ndefread
    hf 14a ndefread -f myfilename      -> save raw NDEF to file