RFID Research Group
Chameleon Ultra
Experiment with supported RFID card emulation.
LF RFIDHF RFIDEmulationBluetooth
- Availability
- Listed
- Design
- Open
- Radio
- 125 kHz LF RFID
Where to buy · 3 shops
For access-control research and testing. Copying or emulating credentials you do not own is a crime in most countries. Buyers are responsible for their local law.
- Bring along
- A compatible client and your own supported tags.
- Keep in mind
- Supported operations depend on firmware and tag type.
Image credit
Maker product image, background removed · RFID Research Group(02) Blueprint
Build it yourself
RfidResearchGroup publishes schematic PDFs and Gerbers for both the main and antenna boards in its firmware repo; no dedicated BOM file, no editable KiCad/Altium source.
Design files 3
Source 2
- RfidResearchGroup/ChameleonUltrahardwareGPL-3.03.0k
- RfidResearchGroup/ChameleonUltraDocsdocsGPL-3.027
git clone https://github.com/RfidResearchGroup/ChameleonUltra.gitResearch notes
Verified via gh api tree of RfidResearchGroup/ChameleonUltra plus downloading and unzipping both hardware zips (Gerbers present, no BOM). The Devkit variant shares the same hardware/dev-tools/*.pdf+zip in the same repo but isn't in this batch.
Every link checked 2026-09-27.
Hand this device to your agent. Everything on this page, as clean Markdown and JSON: specs, shops, prices, design files, parts.
Made the Chameleon Ultra? Put the badge on your README; it links here, with every shop that sells it.
Specifications
Core platform
2
Hardware
9
No matching specification. Try a chip name, connector or feature.
What still needs checking
- Check current firmware documentation for exact tag families and operation support. The hardware guide does not establish battery capacity or runtime.
