GreyCTF Summit
The July 5, 2025 NUS Greyhats cybersecurity summit in Singapore whose public GreyBadge archive documents the GreyMecha/Army badge, setup workflow, KiCad hardware, CircuitPython filesystem, FPGA files, and summit firmware releases.
NUS School of Computing, COM1 Level 2, Singapore · Singapore · 2025
NUS Greyhats' public GreyBadge archive identifies the 2025 GreyCTF badge as GreyMecha/Army, with RP2350-side CircuitPython firmware, KiCad hardware files, an ECP5U_25 FPGA schematic, GC9A01 SPI display, Li-ion power-path circuitry, summit UF2/filesystem releases, and named challenge apps.
Lifecycle
The hardware tree includes an ECP5U_25 CABGA256 schematic and the firmware tree includes ECP5 projects, tests, and a UART coprocessor example with open FPGA tooling notes.
The repository setup flow flashes a CircuitPython UF2, then copies the RP2350 filesystem to CIRCUITPYTHON for the badge runtime.
The filesystem README names the Grey finals challenges as Hornet Revenge, Leaky Pin, Bricked Up, Shooting Flags, Secure Memory, and CatCore.
The main schematic includes a GC9A01 IPS SPI display, while the firmware README describes user-customizable 240x240 JPG/GIF badge images.
The releases page preserves Prototype 3 BOM/CPL/Gerber/schematic assets plus summit_v1 and summit_v2 firmware and filesystem release files.
Operational history
The event and badge are included, but distribution and admission-credential claims remain conservative.
The Singapore record remains source-backed and image-free rather than copying repository artwork, social media, slides, screenshots, or generated badge art.
Repository files are cited as public evidence, but local reuse is limited: no repository images, artwork, hardware files, firmware, or slides are copied into the catalogue as licensed assets.
Software claims stay limited to the recovered repository, filesystem README, and release assets.