Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
The public README documents a 9×9 IS31FL3731 charlieplexed LED matrix and four front LEDs as the badge's visible interaction surface.
Badge context
Contemporaneous attendee report corroborating the hardware-hacking context and crediting Carl Vargklint's badge work; it does not establish universal attendee allocation or assembly.
Public repository pinout reference for the badge's labelled RP2040 interfaces; it does not replace a schematic, PCB release, or BOM.
Security Fest's official completed-event page establishes the May 28-29, 2026 conference at Elite Park Avenue Hotel in Gothenburg.
Public repository identifying itself as the official firmware repository for the Security Fest 2026 conference badge; it is source evidence, not a formal hardware-production release.
GitHub profile identifying the repository publisher Superminaren as Carl Vargklint.
GitHub REST metadata records the May 2026 repository creation/push window and no formal repository license classification.
Repository README documenting the RP2040, memory, LED matrix, front LEDs, buttons, USB, SAO, GPIO, and high-level firmware surfaces.
Source trail
Publisher identity source showing the Superminaren GitHub profile name as Carl Vargklint.
Repository metadata observed in this audit records a May 2026 creation/push window and `license: null`; the README's informal reuse language is not treated as a formal catalogue image license.
Contemporaneous attendee corroboration for hardware-hacking interest around the badge and a narrow credit to Carl Vargklint; it does not prove issuance, manufacturing, or every attendee's experience.
Primary event source confirming Security Fest's ninth conference at Elite Park Avenue Hotel on May 28-29, 2026 in Gothenburg.
Primary badge source calling itself the official firmware repository and documenting the device's concrete hardware and high-level firmware surfaces.
Primary public source-tree record for the badge firmware, repository structure, and its conference-badge association.