# ChameleonUltra Firmware — Open-Source nRF52840 NFC/RFID Firmware

> GPL-3.0 licensed firmware for the ChameleonUltra built on the Nordic nRF52840 SDK. Handles dual-frequency card emulation, MIFARE cracking, BLE communication, and USB-C connectivity with a read-only bootloader preventing bricking.

## Details

- **Difficulty:** advanced
- **Project Type:** build
- **Board Types:** nRF52840
- **Devices:** chameleon-ultra
- **Use Cases:** Security & Surveillance
- **Links:** Github Url: https://github.com/RfidResearchGroup/ChameleonUltra/tree/main/firmware, Blog Url: https://rfidresearchgroup.github.io/ChameleonUltra/firmware.html

## Tags

`nfc`, `rfid`, `firmware`, `nrf52840`, `chameleon-ultra`, `mifare`, `ble`, `open-source`, `nordic-sdk`, `c`

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