GreatFET One

The GreatFET One from Great Scott Gadgets is a versatile, open-source USB hacking and hardware interface tool. With two USB ports (one host, one peripheral), it can act as a man-in-the-middle for USB interfacing, a logic analyser, a debugger, or a custom physical-world interface — all controlled via a Python API from your host computer.

At its core is an NXP LPC4330 (ARM Cortex-M4 at 204 MHz) with hardware floating-point support and DSP instructions. The 100 expansion pins (80-pin female header interface plus 20 bonus male pins) accept add-on boards for extended functionality, and all I/O is rated for 3.3 V.

Key Features

• Dual USB Ports – One host and one peripheral for USB man-in-the-middle and interfacing
• Hi-Speed USB – Fast data transfer to your host computer
• Python API – Control and script the GreatFET from your computer
• 100 Expansion Pins – 80-pin female header plus 20 bonus male pins for add-on boards
• Open Source – Extensible hardware and software design
• 3.3 V I/O – All expansion pins rated for 3.3 V

Specifications

• Processor – NXP LPC4330 (ARM Cortex-M4 at 204 MHz)
• Architecture – 32-bit with hardware FPU and DSP/SIMD instructions
• USB – 2 ports (1× host, 1× peripheral), Hi-Speed
• Expansion – 80-pin female header (2×20 rows × 2) + 20 male pins
• I/O Voltage – 3.3 V

Ideal For

• USB protocol analysis and reverse engineering
• Hardware hacking and security research
• Custom USB interface development
• Logic analysis and debugging
• Bit-banging and physical computing

Package Contents

• 1× GreatFET One (in ESD bag)
• 1× Hi-Speed USB cable
• 1× Wiggler (add-on board separator tool)