HydraNFC Shield v1.0 Specifications

HydraNFC Shield v1.0 Specifications

HydraNFC Shield v1.0 is an NFC shield hardware (to be plugged on top of HydraBus) to sniff/read/write/emulate any 13.56MHz NFC tags for anyone interested in advanced NFC Research/Dev/Debug/Hack/PenTest on NFC products.
It has been designed to be used with HydraBus but can also be used with other MCU.

HydraNFC Shield v1.0 is now superseded by HydraNFC Shield v2 in an other fork see https://github.com/hydrabus/hydrafw_hydranfc_shield_v2 for more details

HydraNFC Shield
HydraNFC Shield v1.0 and HydraNFC Antenna

The HydraNFC Shield v1.0 + Antenna is now Available here: https://lab401.com/products/hydranfc

Note: HydraNFC shield shall be plugged on top of HydraBus (when used with HydraBus).

HydraBus/HydraNFC firmware see github: https://github.com/hydrabus/hydrafw

For more info on hardware of HydraNFC see github: https://github.com/hydrabus/hydranfc

HydraNFC firmware (requires HydraBus) can sniff ISO14443A PICC and PCD both side in real-time


  • HydraNFC shield v1.0 & HydraNFC Antenna package:
    • HydraNFC shield v1.0

      • Pocket size 54x35x13 mm and light weight about 33g
      • Support external NFC Antenna with U.FL connector or SMA (requires SMA male to SMA male cable)
      • 1 SMA female connector included (to be soldered on HydraNFC shield as option)
    • HydraNFC Antenna (included with HydraNFC shield v1.0)
      • U.FL connector (UFL cable included) or SMA
      • 1 SMA female connector included (to be soldered on HydraNFC Antenna as option)
  • Features of the HydraNFC shield board:
    • Autonomous mode with 4 User buttons and 4 User LEDs.
    • Use Texas Instrument TRF7970A NFC chipset with full access to all pins and all modes of TRF7970A through connectors J1/J2/J3.
      • Supports Near Field Communication (NFC) Standards NFCIP-1 (ISO/IEC 18092) and NFCIP-2 (ISO/IEC 21481)
      • Completely Integrated Protocol Handling for ISO15693, ISO18000-3, ISO14443A/B, and FeliCa
      • Integrated Encoders, Decoders, and Data Framing for NFC Initiator, Active and Passive Target Operation for All Three Bit Rates (106 kbps, 212 kbps, 424 kbps) and Card Emulation
      • RF Field Detector With Programmable Wake-Up Levels for NFC Passive Transponder Emulation Operation
      • Programmable System Clock Frequency Output (RF, RF/2, RF/4) from 13.56-MHz Crystal
      • Programmable Modulation Depth
      • Dual Receiver Architecture With RSSI for Elimination of “Read Holes” and Adjacent Reader System or Ambient In-Band Noise Detection
      • Programmable Output Power: +20 dBm (100 mW), +23 dBm (200 mW)
      • Support any protocols under 13.56 MHz with modulation depth OOK (100%) or ASK (from 7% to 30%)
      • HydraBus Antenna (external) with U.FL connector(cable included) or SMA (optional) and can read Mifare card at up to 8cm (with 20cm cable).
        • Antenna Impedance 50 Ohm
      • Hardware doc,  schematic/board are available on github: https://github.com/hydrabus/hydranfc/tree/master/hardware
      • Hardware license CC BY-NC 4.0 (for commercial license contact info@hydrabus.com)