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1

It looks like this is a custom CRC in which the initial value of the algorithm depends on the first byte of the message. These parameters stay consistent for all messages: Polynomial = 0x1d Input Reflected = False Result Reflected = False Final Xor Value = 0x00 But the initial value depends on the first byte: 0x00: init = 0x7a 0x51: init = 0x3a 0x71: ...


0

Based on a few samples, here is an overview of some fields that can be read in clear. Source: https://github.com/fproulx/tastybits/blob/master/NOTES.md Datasets: https://github.com/fproulx/tastybits/tree/master/sample-data Unofficial specification PDF417 barcode with BASE64 encoded binary payload Always 0x7A bytes long == 122 bytes == 976 bits ...


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