DEF CON Singapore 2026 HFSDR Badge
A community HFSDR badge preorder for DEF CON Singapore 2026, documented through Hackin7's r/Defcon preorder post and the linked public rhgndf/hfsdr hardware, firmware, host-software, and WebUSB archive.
DEF CON Singapore
DEF CON Singapore 2026
The April 28-30, 2026 official DEF CON Singapore conference at Marina Bay Sands, represented here by a source-backed unofficial/community HFSDR badge, HTX Public Safety Village badge artifact, and CSIT TISC finalist ESP32 challenge trinket without treating any of them as a universal admission badge.
Marina Bay Sands, Singapore · Singapore · 2026
DEF CON Singapore 2026 Public Safety Village Badge
HTX's official DEF CON Singapore coverage documents Public Safety Village badges, including a badge image described as featuring illuminated icons of emergency vehicles, alongside the first DEF CON Public Safety Village.
DEF CON Singapore 2026 TISC ESP32 Trinket
A source-backed TISC@DEF CON SG finals challenge artifact: CSIT's official C517 page documents the on-site TISC finals, and a finalist writeup says each of the top-50 finalists received an ESP32 hardware trinket running a customized BLE mesh chat protocol to reverse engineer.
Lifecycle
Add-ons & Upgrades
DEF CON Singapore 2026 TISC ESP32 Trinket
first-hand finalist-backed
ESP32 finalist trinket
The finalist writeup says each TISC@DEF CON SG finals participant was handed an ESP32 hardware trinket for one of the on-site challenges.
DEF CON Singapore 2026 HFSDR Badge
source-backed
DEFCON SG preorder and pickup
Hackin7's preorder post offered the HFSDR badge for collection at DEFCON SG, with battery and no-battery kit pricing and possible later handoff at Hackaday Europe or DEFCON US.
DEF CON Singapore 2026 TISC ESP32 Trinket
source-backed
Top-50 on-site finals context
CSIT documents TISC@DEF CON SG as an online qualifier followed by on-site finals, while the finalist writeup says the top 50 finalists qualified and had six hours for five challenges.
DEF CON Singapore 2026 HFSDR Badge
post-event release
HFSDR v1.0/v1.1 release trail
The GitHub release trail now includes v1.0 during DEF CON Singapore and v1.1 afterward, with v1.1 documenting new graphics and a USB streaming reliability fix.
DEF CON Singapore 2026 HFSDR Badge
source-backed
Mini solder kit assembly
The preorder kit included solderable LEDs/resistors and SMA connector work, plus badge PCB, antenna, encoder, and screen.
DEF CON Singapore 2026 HFSDR Badge
source-backed
GNU Radio and Python host tools
The host guide documents a Python probe and GNU Radio examples for streaming samples from the HFSDR USB device.
DEF CON Singapore 2026 HFSDR Badge
source-backed
Portable FM and LED modes
The repository README documents rotary-encoder controls for FM audio output and cycling LED modes when the device is used without a PC.
DEF CON Singapore 2026 Public Safety Village Badge
official HTX-backed
Public Safety Village challenge and swag context
The HTX Public Safety Village page ties the village to AI and IoT public-safety challenges and says top HTX CTF finalists unlocked limited-edition DEF CON Singapore Public Safety Village swag.
DEF CON Singapore 2026 Public Safety Village Badge
official report-backed
Illuminated public-safety icon badge
HTX's launch report image metadata identifies a Public Safety Village badge featuring illuminated icons of emergency vehicles; no component or firmware details are public.
DEF CON Singapore 2026 HFSDR Badge
source-backed
WebUSB SDR configuration
The repository describes pairing through the WebUSB UI, setting frequency and gain, pairing again, and then observing the waterfall.
DEF CON Singapore 2026 TISC ESP32 Trinket
first-hand finalist-backed
BLE mesh chat protocol
The trinket ran a customized mesh chat protocol over BLE, with the challenge requiring reverse engineering to gain access to an administrative system broadcasting over the protocol.
Operational history
Issues & Camp Impact
The ESP32 trinket is documented as a TISC finals challenge device handed to finalists, not as an all-attendee DEF CON Singapore badge or universal conference credential.
The catalogue includes it as a source-backed C517 Village challenge artifact while avoiding an official admission-badge claim.
The public source trail identifies ESP32 hardware and BLE mesh behavior but does not publish schematic, PCB files, BOM, firmware, binaries, protocol documentation, exact module variant, or production files.
Hardware and software claims stay limited to the finalist writeup's challenge description.
The public archive preserves firmware, host software, and a hardware directory, but this pass does not reconcile final manufactured units, BOM revisions, production lot, or full shipped feature parity with the preorder list.
Hardware claims are limited to preorder text, repository structure, README behavior, and host-guide protocol documentation.
HTX's launch article proves a Public Safety Village badge artifact and visible illuminated emergency-vehicle icons, but no reviewed public source publishes a MCU, schematic, firmware, BOM, battery, distribution count, or challenge protocol for this badge.
The record documents the verified village badge artifact without inventing electronics, firmware, production, or distribution details.
No HFSDR image is published because the Reddit and repository images, including docs/img/hfsdr.png and art export PNGs, have not been paired with a reusable image license, exact attribution, and processing provenance for badge.gallery publication.
The Singapore record remains source-backed and image-free rather than copying social-media previews, repository screenshots, repository artwork, or generated imagery.
No Public Safety Village badge image is published because the HTX launch article credits the photo to HTX/Dorcas Yang but does not provide explicit reusable image licensing or badge.gallery publication permission.
The record remains image-free rather than copying the HTX article photo, using a documentation screenshot, or substituting generated badge art.
No TISC trinket image is published because the finalist writeup's useful photo does not provide an explicit reusable image license, attribution basis, and processing provenance for badge.gallery publication.
The Singapore C517 record remains source-backed and image-free rather than copying an article photo, screenshot, or generated substitute.
The HFSDR repository release list still has v1.0 on 2026-04-29 and v1.1 on 2026-05-18 as of the 2026-05-21 recheck, but public sources still do not confirm shipped quantity, every final manufactured-unit revision, or official admission-badge status.
The record is stronger for firmware artifacts but remains classified as community/unofficial unless an official DEF CON source identifies it as the official conference badge.
A 2026-05-21 GitHub API and repository-contents recheck found `license: null` and still did not recover a LICENSE, LICENSE.md, or COPYING file in the public HFSDR repository.
The catalogue cites repository facts as public evidence but does not reuse repository images, hardware files, or code assets as licensed local content.
The official DEF CON Singapore page establishes the conference, while the HFSDR sources are community/repository sources. No reviewed official DEF CON page identifies HFSDR as the official event admission badge.
The record is included as a source-backed community badgelife artifact connected to DEF CON Singapore, not as an official DEF CON badge claim.
Resources
Lain-themed HFSDR UI source tree
alternate web UI source · Hackin7 repository UI source tree for the related Lain-themed interface; the GitHub Pages deployment timed out during a May 21, 2026 reachability check.
HFSDR preorder post
community preorder · 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.
HFSDR interest-gauging post
community source · Earlier Hackin7 post establishing the public development thread for a DEFCON SG SDR badge and linking forward to the preorder thread.
DEF CON Singapore 2026 event page
event page · 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.
DEF CON Singapore 2026 event page
event page · Official DEF CON page anchoring the April 28-30, 2026 Singapore host event; it does not classify the TISC trinket as an official admission badge.
DEF CON Singapore launch report
event report · HTX's official report documents the launch event, 11 villages and 19 communities, the inaugural Public Safety Village, and an image alt text identifying a Public Safety Village badge with illuminated emergency-vehicle icons.
TISC@DEFCON Singapore 2026 Finals writeup
finalist writeup · Finalist report documenting top-50 qualification, six-hour finals format, and the ESP32 BLE mesh challenge trinket handed to each participant.
HFSDR CH32V305 firmware README
firmware documentation · Firmware build and flash notes for the CH32V305 SDR target, including CMake/Ninja/toolchain setup and wchisp flashing workflow.
HFSDR v1.0 release
firmware release · Release published during DEF CON Singapore on 2026-04-29 with an hfsdr.elf asset, anchoring a post-event firmware artifact beyond preorder text.
HFSDR v1.1 release
firmware release · Post-event release published 2026-05-18; release notes document new graphics and a USB streaming reliability fix.
rhgndf/hfsdr repository
hardware and firmware archive · Public HFSDR archive preserving host software, CH32V305 firmware, KiCad hardware tree, scripts, documentation, WebUSB links, portable mode notes, and project credits.
Public Safety Village preview
official preview · HTX preview article framing the first Public Safety Village at DEF CON Singapore and its mission-critical public-safety hacking scope.
C517 Village at DEF CON SG
official village page · CSIT official C517 Village page documenting TISC@DEF CON SG as a special-edition Capture The Flag with online qualifiers and on-site finals at DEF CON Singapore.
HTX@DEF CON SG Public Safety Village
official village page · Official HTX page describing the Public Safety Village, AI and IoT Capture The Flag, three public-safety challenge zones, and limited-edition Public Safety Village swag for top CTF finalists.
HFSDR host guide
protocol documentation · 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.
HFSDR user manual slides
user manual · Repository-linked user manual slide deck for the HFSDR device.
HFSDR WebUSB UI source tree
web UI source · 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.
Sources
CSIT: C517 Village at DEF CON SG
Retrieved 2026-05-15 · Official C517 Village source for TISC@DEF CON SG, online qualifier and on-site final structure, C517 Village context, and CSIT framing.
DEF CON: DEF CON Singapore
Retrieved 2026-05-15 · 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.
DEF CON: DEF CON Singapore
Retrieved 2026-05-15 · Official host-event source for the April 28-30, 2026 DEF CON Singapore conference at Marina Bay Sands; this source does not identify the TISC trinket as an official admission badge.
GitHub / rhgndf: HFSDR CH32V305 firmware README
Retrieved 2026-05-15 · Primary firmware source for CH32V305 SDR target build prerequisites and flashing workflow.
GitHub / rhgndf: HFSDR host guide
Retrieved 2026-05-15 · Primary protocol source for Python/GNU Radio host workflows, USB IDs/interface/endpoints, I/Q sample reconstruction, stream format, and WebUSB descriptor behavior.
GitHub / rhgndf: HFSDR v1.0
Retrieved 2026-05-15 · Release source published 2026-04-29 with an hfsdr.elf artifact, giving the HFSDR record a post-event firmware-release anchor.
GitHub / rhgndf: HFSDR v1.1
Retrieved 2026-05-15 · Release source published 2026-05-18 documenting new graphics and a USB streaming reliability fix.
GitHub / rhgndf: rhgndf/hfsdr
Retrieved 2026-05-15 · 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.
HTX: HTX@DEF CON SG
Retrieved 2026-05-15 · Official HTX page for the Public Safety Village, DEF CON Singapore dates and venue, HTX Capture The Flag, public-safety challenge framing, and limited-edition Public Safety Village swag language.
HTX: Hack systems that protect at DEF CON Singapore's Public Safety Village
Retrieved 2026-05-15 · Official preview source for the Public Safety Village concept and the public-safety technologies in scope before DEF CON Singapore opened.
HTX: Inside DEF CON Singapore: Where hackers battle it out to strengthen cybersecurity
Retrieved 2026-05-15 · Primary HTX event report for DEF CON Singapore's launch, 11 villages and 19 communities, the Public Safety Village, and the Public Safety Village badge image metadata and photo credit. The article is used as evidence, not as reusable image permission.
U-Zyn Chua: TISC@DEFCON Singapore 2026 Finals
Retrieved 2026-05-15 · First-hand finalist source for the top-50 finalist group, six-hour five-challenge finals, and ESP32 BLE mesh hardware trinket handed to each participant.
r/Defcon / Hackin7: Gauging interest in DEFCON SG SDR badge
Retrieved 2026-05-15 · Earlier public source tying Hackin7 to development of a DEFCON SG SDR badge and documenting the intended FM/SDR scope before preorder publication.
r/Defcon / Hackin7: hfsdr preorders for DEFCON SG
Retrieved 2026-05-15 · 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.