Add-on dossier
USB and expansion surfaces
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
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attendee corroboration
Contemporaneous attendee report corroborating the hardware-hacking context and crediting Carl Vargklint's badge work; it does not establish universal attendee allocation or assembly.
Badge: Security Fest 2026 RP2040 Badge
hardware reference
Public repository pinout reference for the badge's labelled RP2040 interfaces; it does not replace a schematic, PCB release, or BOM.
Badge: Security Fest 2026 RP2040 Badge
official event page
Security Fest's official completed-event page establishes the May 28-29, 2026 conference at Elite Park Avenue Hotel in Gothenburg.
Badge: Security Fest 2026 RP2040 Badge
public firmware repository
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.
Badge: Security Fest 2026 RP2040 Badge
publisher identity
GitHub profile identifying the repository publisher Superminaren as Carl Vargklint.
Badge: Security Fest 2026 RP2040 Badge
repository metadata
GitHub REST metadata records the May 2026 repository creation/push window and no formal repository license classification.
Badge: Security Fest 2026 RP2040 Badge
technical reference
Repository README documenting the RP2040, memory, LED matrix, front LEDs, buttons, USB, SAO, GPIO, and high-level firmware surfaces.
Badge: Security Fest 2026 RP2040 Badge
GitHub · retrieved 2026-05-15
Publisher identity source showing the Superminaren GitHub profile name as Carl Vargklint.
Badge: Security Fest 2026 RP2040 Badge
GitHub REST API · retrieved 2026-05-15
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.
Badge: Security Fest 2026 RP2040 Badge
Jonathan B. / LinkedIn · retrieved 2026-05-15
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.
Badge: Security Fest 2026 RP2040 Badge
Securityfest AB · retrieved 2026-05-15
Primary event source confirming Security Fest's ninth conference at Elite Park Avenue Hotel on May 28-29, 2026 in Gothenburg.
Badge: Security Fest 2026 RP2040 Badge
Superminaren / GitHub · retrieved 2026-05-15
Primary badge source calling itself the official firmware repository and documenting the device's concrete hardware and high-level firmware surfaces.
Badge: Security Fest 2026 RP2040 Badge
Superminaren / GitHub · retrieved 2026-05-15
Primary public source-tree record for the badge firmware, repository structure, and its conference-badge association.
Badge: Security Fest 2026 RP2040 Badge