Hey folks,

I’ve put together a little open puzzle for anyone who enjoys reverse-engineering firmware/data dumps.

We have a system that uses a 1-Wire token + 24C64 EEPROM as a paired memory card.
I’ve captured before/after dumps from several cards and collected them here:

👉 GitHub repo: https://github.com/potman100/1wire-24c64-puzzle

Inside you’ll find:

• Full 1-Wire Page0 data
• Matching 24C64 EEPROM dumps (before/after use)
• Several cards (A–E) for comparison
• A starting coding puzzle (count bytes, find patterns, spot repeated sequences, etc.)

The challenge 🧩

The question is:
👉 What rules/algorithm link the 1-Wire token with the EEPROM contents?

Hints:

• Changes occur at specific offsets after card use.
• Some data looks like counters / checksums.
• There are repeating 4-byte structures.

It’s a self-contained reverse-engineering puzzle — no special hardware needed, just hex dumps.
If you enjoy finding structure in “mystery bytes”, this might be up your alley.

Would love to see what others spot in these dumps! 🕵️‍♂️