marcinruszkiewicz

marcinruszkiewicz / lego_smart_brick

Public

LEGO Smart Brick NFC Tag Toolkit

19
2
69% credibility
Found Mar 20, 2026 at 19 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
Elixir
AI Summary

A collection of tools to read, study, and duplicate NFC tags from LEGO Smart Brick toys using affordable hardware and Mac apps.

How It Works

1
🧩 Discover tag duplicator

You love LEGO Smart Bricks but wish you had more character tags without buying whole sets, so you find this free toolset online.

2
🛒 Get easy hardware

Order a simple reader board and blank sticker sheets that arrive in the mail, ready to use with your computer.

3
🔌 Connect reader

Plug the reader into your Mac and launch the friendly app that finds it automatically.

4
📱 Scan real tag

Hold your LEGO tag near the reader and watch it capture the hidden data, saving it safely for later.

5
🔄 Copy to blank

Pick a saved tag from the list, place a blank sticker on the reader, and let it duplicate the data perfectly.

🎉 Play with clones

Place your new homemade tag on the LEGO brick and see it recognize your extra characters instantly, just like the originals.

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Star Growth

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AI-Generated Review

What is lego_smart_brick?

This Elixir-based toolkit lets you read, analyze, and clone NFC tags from LEGO Smart Brick sets using an ESP32 board with a PN7150 reader and a Mac CLI app. It captures tag dumps to JSONL files, diffs payloads for patterns, and writes byte-perfect clones to blank ISO 15693 stickers—even across different UIDs or chip vendors like EM4233. Python scripts handle firmware reverse-engineering, extracting AES-128-CCM keys and disassembly for deeper lego smart brick analysis.

Why is it gaining traction?

Cloning succeeds flawlessly since all tags of the same type share identical encrypted payloads, bypassing UID checks on the brick—perfect for lego smart brick star wars sets or backups. It ties into the lego github ecosystem like lego mindstorm, lego spike prime, and lego sorter projects, with quick-start CLIs for capture/analyze/clone and a BLE client for brick control like volume or file transfers. Niche but thorough docs and hardware wiring details make it dead simple to hack.

Who should use this?

LEGO modders tired of buying lego smart brick einzeln kaufen at premium preis, especially for limited sets shown at lego smart brick ces. Reverse engineers exploring toy NFC crypto or firmware, akin to github lego island decomp efforts. Hardware tinkerers with ESP32 setups wanting unlimited tags for custom lego smart brick system builds.

Verdict

Grab it if you're in the lego smart brick reddit crowd—19 stars reflect its fresh niche status, but docs and cloning workflow shine. 0.7% credibility score flags early maturity; test on blanks first. Solid for targeted hacks, skip for general NFC.

(198 words)

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