RfidResearchGroup/ChameleonUltra
Some data may be outdated — see provenance labels.
The new generation chameleon based on NRF52840 makes the performance of card emulation more stable. And gave the chameleon the ability to read, write, and decrypt cards. observed · 2026-09-27
Health v2 · maintenance only
80/100
- Activity 94
- Release rhythm 52
- Longevity 99
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 304
- age_days: 1398
- days_rel: 108
- days_push: 39
- n_releases_24m: 2
Adoption not part of the score
3040 stars · 459 forks observed · 2026-09-27
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
ChameleonUltra is the open-source firmware for an RFID/NFC card emulation device based on the NRF52840, capable of reading, writing, decrypting, and simulating cards like Mifare and NTAG. It is controlled via a CLI and companion GUI apps over BLE.
Use cases
- emulate mifare classic cards
- clone rfid access cards
- read and decrypt nfc tags
- simulate 125khz and 13.56mhz cards
- test nfc readers with card emulation
- analyze iso14443a card communication
When to choose
- you own a Chameleon Ultra device and need firmware or client tooling
- you need a programmable RFID/NFC card emulator for security research
- you want to clone or emulate Mifare, NTAG, or 125kHz credentials
When to avoid
- you need software-only NFC emulation without dedicated hardware
- you want a general-purpose SDR or smart-card tool outside RFID/NFC
- you need a turnkey commercial product rather than a research device
Facets
application · maturity active
security cli developer-tools security hardware reverse-engineering embedded cross-platform cli rfid nfc mifare card-emulation firmware nrf52840 125khz iso14443a
1 source
- readme: https://github.com/RfidResearchGroup/ChameleonUltra · fetched 2026-09-27 · a0b7dbe26e52
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| RfidResearchGroup/ChameleonUltra | main | 80 |
For agents
markdown · JSON · MCP: product_card(name="RfidResearchGroup/ChameleonUltra")
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem