Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
The repository describes pairing through the WebUSB UI, setting frequency and gain, pairing again, and then observing the waterfall.
Badge context
Hackin7 repository UI source tree for the related Lain-themed interface; the GitHub Pages deployment timed out during a May 21, 2026 reachability check.
Hackin7's r/Defcon preorder post documenting the DEFCON SG collection context, kit contents, pricing, SDR/FM/waterfall/FFT features, soldering kit details, and link to the public HFSDR repository.
Earlier Hackin7 post establishing the public development thread for a DEFCON SG SDR badge and linking forward to the preorder thread.
Official DEF CON page documenting the April 28-30, 2026 Singapore conference at Marina Bay Sands; it anchors the event context but does not label the HFSDR as the official event badge.
Firmware build and flash notes for the CH32V305 SDR target, including CMake/Ninja/toolchain setup and wchisp flashing workflow.
Release published during DEF CON Singapore on 2026-04-29 with an hfsdr.elf asset, anchoring a post-event firmware artifact beyond preorder text.
Post-event release published 2026-05-18; release notes document new graphics and a USB streaming reliability fix.
Public HFSDR archive preserving host software, CH32V305 firmware, KiCad hardware tree, scripts, documentation, WebUSB links, portable mode notes, and project credits.
Repository guide documenting Python and GNU Radio host examples, USB vendor/product/interface details, bulk endpoints, sample-stream format, and WebUSB landing-page descriptor request.
Repository-linked user manual slide deck for the HFSDR device.
Repository UI source tree for the WebUSB interface used to pair, configure frequency and gain, and display the SDR waterfall; the GitHub Pages deployment timed out during a May 21, 2026 reachability check.
Source trail
Official event-context source for the April 28-30, 2026 DEF CON Singapore conference at Marina Bay Sands; this source does not identify the HFSDR as an official DEF CON badge.
Primary firmware source for CH32V305 SDR target build prerequisites and flashing workflow.
Primary protocol source for Python/GNU Radio host workflows, USB IDs/interface/endpoints, I/Q sample reconstruction, stream format, and WebUSB descriptor behavior.
Release source published 2026-04-29 with an hfsdr.elf artifact, giving the HFSDR record a post-event firmware-release anchor.
Release source published 2026-05-18 documenting new graphics and a USB streaming reliability fix.
Primary repository source for HFSDR host software, firmware, hardware design tree, CH32V305 firmware path, WebUSB links, portable mode behavior, user manual link, and project credits.
Earlier public source tying Hackin7 to development of a DEFCON SG SDR badge and documenting the intended FM/SDR scope before preorder publication.
First-hand community preorder source for DEFCON SG pickup, HFSDR kit contents, SMA/antenna/encoder/screen/LED parts, 50-60 SGD pricing, RF up to 300 MHz, onboard FM demodulation, waterfall/FFT display, LiPo charger, reprogrammability, and repository link.