KyberWrite

June 3, 2026 · View on GitHub

Program EM4x05 RFID tubes to act as Disney Galaxy's Edge kyber crystals, using a Flipper Zero running Unleashed firmware.

Converted from the original Proxmark3 Lua script by Spandox.

Requirements

Requirement	Notes
Flipper Zero	Any hardware revision
Unleashed firmware	≥ 0.9x (needs `lfrfid_raw_write_em4x05_word`)
EM4x05 tube blank	FDX-B animal chips work; the script re-formats them
`fbt` build toolchain	From the Unleashed repo

The stock Flipper firmware does not expose EM4x05 block-write capability. You must be on Unleashed (or RogueMaster, which forks Unleashed).

Building

(You can just take the fap I compiled in the root and use directly by placing in the /ext/apps/RFID/kyberwrite.fap or compile it yourself)

# Clone Unleashed firmware
git clone https://github.com/DarkFlippers/unleashed-firmware
cd unleashed-firmware

# Drop this folder into applications_user/
cp -r /path/to/kyberwrite applications_user/kyberwrite

# Build 
./fbt fap_kyberwrite

# build will be located at
unleashed-firmware/build/f7-firmware-D/.extapps/kyberwrite.fap

# DEPLOY (install)
I use [Flipper Lab](https://lab.flipper.net/archive)
Copy the compiled `.fap` (or the one I compiled at the root) to your Flipper at
/ext/apps/RFID/kyberwrite.fap

Full Init — use on a fresh/blank EM4x05 chip (e.g. an FDX-B animal chip). Writes all 13 data blocks in the correct order (skipping the password block, writing block 1 last — same logic as the original Proxmark script).

Quick Change — use on a chip already formatted as a kyber crystal. Writes only address 6 (the color/voice selector). Much faster.

Flow

Main Menu
  ├─ Full Init     ─┐
  └─ Quick Change  ─┴─▶  Color Picker (19 crystals)
                               │
                               ▼
                        Writing (progress)
                               │
                         ┌─────┴──────┐
                       Pass          Fail
                      popup         popup
                         └─────┬──────┘
                               ▼
                          Main Menu

Physical placement

Hold the EM4x05 tube flat against the back of the Flipper, centered over the RFID coil (the coil is the teardrop-shaped antenna trace near the top). Keep it still during the write sequence — moving it mid-write will cause a block-write failure.

Crystal reference

Code	Color	Sith Voice	Jedi Voice	Jedi (in Sith mode)
18003000	White	Palpatine	Ahsoka Tano	Old Luke
5E003000	Red	Darth Vader	Yoda	Qui-Gon, Yoda
3D003000	Orange	—	—
7B003000	Yellow	Palpatine	Temple Guard	Old Luke
0C803000	Green	Palpatine	Qui-Gon Jinn	Old Luke, Mace
4A803000	Cyan	—	—
29803000	Blue	Palpatine	Old Obi-Wan	Old Luke
6F803000	Purple	Palpatine	Mace Windu 1	Old Luke
14403000	White	Palpatine	Chirrut Imwe	Old Luke
52403000	Red	Palpatine	Yoda	Young Obi-Wan
31403000	Red	Count Dooku	Yoda	Yoda, Old Obi-Wan
77403000	Yellow	Palpatine	Maz Kanata	Old Luke
00C03000	Green	Palpatine	Yoda	Old Luke
46C03000	Red	Darth Maul	Yoda	Bendu, sound fx
25C03000	Blue	Palpatine	Old Luke	Old Luke
63C03000	Purple	Palpatine	Mace Windu 2	Old Luke, Mace
3E183000	Red	Vader 8-Ball	Yoda	Mace Windu
5D183000	Green	Palpatine	Yoda 8-Ball	Old Luke
1B183000	Black	Snoke	Yoda	Old Obi-Wan

Data sourced from the community spreadsheet originally linked in the Proxmark script.

Notes & caveats

Password block (addr 2) is intentionally skipped. The Proxmark script skips it too. If you need to change the password you'll need to extend the write order and add the password word.
Block 1 is written last, matching the original script — writing it early causes failures on some chips.
The 300 ms inter-block delay mirrors the sleep(1) in the Lua original but is shorter. If you get write failures try increasing WRITE_DELAY_MS in kyberwrite_scene_writing.c.
Orange (3D003000) and Cyan (4A803000) are listed as having no associated voice lines in the community data.

License

Do what you want with it. Based on public community research into Galaxy's Edge lightsaber electronics. No affiliation with Disney.