Association of Information Security Professionals
Publisher of the community event listing used for the June 26-27, 2024 date and M Hotel Singapore venue.
SourceOff-By-One Conference 2024 · Singapore · 2024
Off-By-One 2024 Hardware Badge
Singapore dual-screen Octopus badge
Off-By-One Conference 2024 used an Octopus-themed hardware badge with ESP32-S3 and ATmega328P controllers, dual 128x128 GC9A01 round LCDs, IR, WS2812 LEDs, buttons, a user-flashable MicroPython challenge surface, and six published challenge flags.
SeriesOff-By-One
LocationM Hotel Singapore
CountrySingapore
Image Provenance
- Asset
- optimized WebP from licensed attendee photo
- Status
- licensed original photo
- Source
- badge_front.jpg
- License
- Creative Commons Attribution 4.0 International
- Attribution
- elmo, Off-By-One 2024 Hardware Badge writeup
- Notes
- Original 718x699 attendee photo downloaded from the CC BY 4.0 Off-By-One 2024 Hardware Badge writeup and preserved locally as `Public/images/source/offbyone-2024-badge-front-elma-cc-by-4.jpg`. The photo shows the physical purple Octopus badge front with dual round screens, USB-C cable, push buttons, LEDs, lanyard slot, and visible Off-By-One 2024/#BadgeLife screen text. This is a real documentary badge photo, not generated content, placeholder art, social-media media, or an approximate render. The published badge.gallery delivery file is an optimized WebP generated from the rights-cleared local derivative/source with metadata stripped, WebP quality 82, and a maximum side cap of 1600 pixels when the source is larger; upstream source URL, license, and attribution remain unchanged.
People
Authors & Credits
elmo
Author and publisher of the CC BY 4.0 Off-By-One 2024 badge writeup and front/back badge photos used for evidence and image provenance.
SourceManzel
The attendee writeup credits Manzel as the person who created the Off-By-One 2024 hardware badge.
SourceOff-By-One
Official conference publisher for the Singapore offensive-security conference lineage.
SourceWhy It Mattered
It adds a rights-cleared Singapore conference-badge photo and a deep attendee challenge writeup to the Asian compendium, connecting local offensive-security conference culture with modern #BadgeLife hardware and MicroPython puzzle design.
Hardware
The CC BY 4.0 attendee writeup identifies two microcontrollers, an ESP32-S3 and an ATmega328P, plus two 128x128 GC9A01 displays, six push buttons, four WS2812 LEDs, IR transmitter/receiver, SAO connector, dual AAA battery power, and internal I2C communication between the controllers. The front photo shows the Octopus board, dual round screens, USB-C connector, controls, LEDs, and lanyard slot.
Software & Apps
The writeup says the main system ran Arduino on the ESP32-S3 while the ATmega328P ran MicroPython, and that attendees could plug in by USB, edit Python files, and solve six badge flags. Documented challenge surfaces include a web server app, Bluetooth Low Energy clueing, roulette odds/patching, file inspection, and internal-controller interaction; no full firmware repository is claimed in this seed.
Lore
The badge was created by Manzel and documented by elmo after the first Off-By-One conference. The writeup credits conference #BadgeLife activity, shows the author customization string on the badge's welcome screen, and records all six flags as post-event challenge evidence.
Lifecycle
Add-ons & Upgrades
badge I/O
source-backed
IR and SAO expansion surfaces
The documented hardware includes IR transmitter/receiver and an SAO connector alongside the main badge controls and lights.
Source
badge challenge
source-backed
MicroPython badge challenge
The writeup documents USB file access, Python files, and six challenge flags across web, BLE, roulette, file, and inter-controller puzzle surfaces.
Source
badge interface
source-backed
Dual GC9A01 screen interface
The badge carried two 128x128 GC9A01 circular LCDs, buttons, WS2812 LEDs, USB-C, and a visible Octopus board shape.
Source
hardware architecture
source-backed
Dual-controller badge core
The attendee writeup identifies an ESP32-S3 running Arduino and an ATmega328P running MicroPython, with the two controllers talking over I2C.
SourceOperational history
Issues & Camp Impact
challenge-spoiler source caveat
note
The strongest technical source is a post-event writeup containing all six flag strings and solution details.
The catalogue uses the writeup to prove challenge behavior while avoiding full challenge-solution reproduction in the badge summary.
- Confidence
- attendee writeup
- Status
- documented
- Timeframe
- post-event 2024 writeup
- Source note
- elmo Off-By-One 2024 Hardware Badge writeup.
hardware archive gap
note
The public source trail documents components, visible board behavior, and challenge surfaces, but this pass did not recover a public schematic, KiCad tree, BOM, firmware repository, Gerbers, production quantity, or official badge-team release.
Hardware and software fields stay limited to the attendee writeup, licensed photos, and public event context.
- Confidence
- source-backed but incomplete
- Status
- needs public badge-team archive
- Timeframe
- 2024 badge archive pass
- Source note
- elmo writeup, AiSP event listing, and current Off-By-One site.
image provenance
note
The Off-By-One 2024 hero image uses elmo's CC BY 4.0 front badge photo from the attendee writeup.
The Singapore record can show a real badge photo with source URL, license, attribution, preserved local source original, and optimized WebP delivery rather than generated or unclear imagery.
- Confidence
- CC BY 4.0 source page and exact raster URL
- Status
- licensed original photo applied
- Timeframe
- current catalogue build
- Source note
- Off-By-One 2024 badge writeup, badge_front.jpg, Creative Commons Attribution 4.0, and badge.gallery image policy.
Resources
Off-By-One 2024 badge front photo
licensed image source · Original front badge photo from the CC BY 4.0 attendee writeup, preserved locally and optimized as the public WebP hero image.
Off-By-One 2024 badge writeup
attendee writeup · CC BY 4.0 attendee writeup documenting the badge hardware, MicroPython workflow, six challenge flags, Manzel authorship, and source badge photos.
Off-By-One 2024 event listing
event listing · AiSP community event listing for OFF-BY-ONE 2024, June 26-27, 2024, at M Hotel Singapore.
Off-By-One official site
official conference site · Current official Off-By-One site describing Singapore's annual offensive-security conference and community scope.
Sources
Association of Information Security Professionals: OFF-BY-ONE 2024
Retrieved 2026-05-15 · Event-context source for the 26-27 Jun 2024 dates and M Hotel Singapore venue.
Off-By-One: OFF-BY-ONE 2026
Retrieved 2026-05-15 · Current official site source for Off-By-One as Singapore's annual cybersecurity conference for offensive-security practitioners; used as conference-lineage context, not as 2024 badge hardware evidence.
elmo: Off-By-One 2024 Hardware Badge
Retrieved 2026-05-15 · Primary attendee source for the Off-By-One 2024 hardware badge, dual-controller design, dual GC9A01 screens, IR, SAO connector, WS2812 LEDs, MicroPython challenge workflow, six flags, Manzel credit, and CC BY 4.0 image license.