Issue dossier
All technical detail comes from attendee research published September 26-28, 2026. GrrCON's official homepage still read pre-event on October 1 and names no badge, and no source gives a production count, whether every attendee received one, variants, or the designer's own documentation.
A linkable camp-impact record with badge context, severity, evidence confidence, and source notes.
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organizer documentation and completion gap · attendee sources plus official site · attendee-documented; official wrap-up and allocation unpublished
The record treats the badge as a real event artifact without asserting universal allocation, and the edition is not marked completed on official wrap-up evidence.
- Badge
- GrrCON 2026 15th Anniversary Badge
- Category
- organizer documentation and completion gap
- Severity
- note
- Confidence
- attendee sources plus official site
- Status
- attendee-documented; official wrap-up and allocation unpublished
- Timeframe
- post-event as of 2026-10-01
- Source note
- GrrCON official site; Redline Cyber Security writeup; securekomodo firmware archive.
attendee badge writeup
Bryan Smith's September 26, 2026 first-hand writeup on the Redline Cyber Security blog covering the artwork, LEDs, the non-functional RECHARGE port, finding the serial pins, the pin-12 trigger, the rick astley answer, and dumping and reflashing the ATtiny1616 over UPDI.
Badge: GrrCON 2026 15th Anniversary Badge
attendee firmware dump
Repository created September 26, 2026 with the unmodified 16 KB flash and 256 B EEPROM read from the badge, SHA-256 checksums, a pinout, console and UPDI wiring, and restore instructions. Organizer-authored firmware, not a source release; no licence is declared.
Badge: GrrCON 2026 15th Anniversary Badge
official event page
Official site for the September 24-25, 2026 conference at DeVos Place, Grand Rapids. The October 1, 2026 recheck still found Get Tickets and no recap or badge mention.
Badge: GrrCON 2026 15th Anniversary Badge
Bryan Smith / Redline Cyber Security · retrieved 2026-10-01
Secondary first-hand attendee source for the badge's existence at the 15th-anniversary event, the artwork, LED colours, button, coin-cell power, RECHARGE port, the challenge flow and answer, the designer's FTDI warning a week before the con, and the designer credit to Dave Schwartzberg of Hak4Kidz. It does not describe how many badges were made or how they were handed out.
Badge: GrrCON 2026 15th Anniversary Badge
GrrCON · retrieved 2026-10-01
Official event source for the September 24-25, 2026 dates and DeVos Place venue. It does not mention the anniversary badge and still read pre-event on October 1, 2026.
Badge: GrrCON 2026 15th Anniversary Badge
securekomodo / GitHub · retrieved 2026-10-01
Attendee archive for the ATtiny1616 identification, signature, fuse state, USART0 and UPDI pins, the PC0 trigger, the Sentinel Watch Mode message, and the GRRE EEPROM marker, describing the badge as the GrrCON 2026 Hak4Kidz challenge badge.
Badge: GrrCON 2026 15th Anniversary Badge