# Flipper Zero RFID Card: My Journey into RFID Technology ## What is Flipper Zero RFID Card? The **Flipper Zero RFID card** is a core component of the Flipper Zero multi-tool device, designed for interacting with various RFID systems. From my personal experience as a cybersecurity enthusiast, the moment I unboxed my Flipper Zero, the potential of its RFID capabilities immediately captivated me. I've always had a knack for understanding wireless protocols, and this tool felt like an extension of my own curiosity. ### Technical Specifications and Parameters of Flipper Zero RFID Module To truly grasp its utility, let's delve into the technical heart of the **Flipper Zero RFID card** system. **Primary RFID/NFC Capabilities:** * **Supported Frequencies:** LF (125 kHz) and HF (13.56 MHz). * **LF (125 kHz) Protocols:** EM4100, EM-Marine, HID Prox, Indala, and other common ASK/PSK protocols. * **HF (13.56 MHz) Protocols:** NFC-A (ISO14443A), NFC-B (ISO14443B), MIFARE Classic (1K/4K), MIFARE Ultralight, MIFARE DESFire, and NFC-F (FeliCa). * **Chipset/Controller:** The RFID functionality is driven by an integrated ST25R3916 high-performance NFC/RFID transceiver. This chip is managed by the main STM32WB55 microcontroller unit (MCU). * **Detailed Dimensions:** The device itself measures approximately 100mm x 60mm x 20mm. The internal RFID antenna is a custom-designed PCB trace loop optimized for both frequency ranges. * **Firmware & Code:** The system runs on a custom open-source firmware, with core RFID operations handled in modules like `lfrfid` and `nfc`. Key source files for RFID functionality can be found in the `/applications/services/lfrfid` and `/lib/nfc` directories of the official firmware repository. > **Important Note:** The technical parameters provided above are for reference and illustrative purposes. Specific, detailed chip codes, exact antenna schematics, and firmware implementation details are proprietary and subject to change. For the most accurate and