TROOPERS

TROOPERS19

A German IT-security conference with a public ESP32 e-paper keyboard badge hardware writeup, KiCad files, and Shitty Addon ecosystem.

Heidelberg · Germany · 2019

TROOPERS19 Badge

A WiFi-connected MicroPython badge for TROOPERS19 with ESP32-WROVER, 2.9 inch e-paper display, full QWERTY keyboard, joystick, USB-C charging/flashing, LEDs, accelerometer, and Shitty Addon support.

Lifecycle

Add-ons & Upgrades

TROOPERS19 Badge historical

hardware add-on

Fuccs Shitty Addon

Jeff and Jann Foehringer designed the Fuccs add-on, with the PCB layout published in its own repository.

Compatibility: TROOPERS19 Badge Shitty Addon connector

TROOPERS19 Badge historical

hardware add-on interface

Shitty Addon connector

The TROOPERS19 badge exposed a 3.3 V I2C Shitty Addon interface so the badge could wear its own small add-on boards.

Compatibility: TROOPERS19 Badge

Operational history

Issues & Camp Impact

TROOPERS19 Badge note

hardware production caveats · primary writeup · historical

The writeup calls out ESP32-WROVER unusable-pin traps and WS2812B-mini moisture/baking problems that caused debugging and rework.

These caveats make the record useful beyond specs: future badge teams can learn from the production failure modes.

TROOPERS19 Badge note

missing rights-cleared image · local project policy · needs licensed original replacement

No TROOPERS19 Badge image is published because the current public source trail has not been paired with a reusable original badge or artifact photo or official upstream raster render with source URL, license or permission basis, attribution, and processing notes.

The Germany record remains source-backed and image-free rather than copying source-page media, documentation screenshots, event photos, social media, placeholders, or generated approximations.

TROOPERS19 Badge note

tooling and schedule caveat · primary writeup · historical

The hardware designer says migrating the PCB workflow from Eagle to KiCad caused painful delays, even though it left the design files in an open format.

The badge is a good example of how open-toolchain choices can improve reuse while still affecting event production schedules.

Resources

Shitty Add-On standard coverage add-on context · Context for the badge add-on interface referenced in the TROOPERS19 writeup. TROOPERS19 event page event page · Official TROOPERS19 event page. Fuccs Shitty Addon hardware hardware add-on · Fuccs Shitty Addon repository linked from the TROOPERS19 badge hardware post. TROOPERS19 badge hardware writeup hardware article · ERNW/Insinuator post by Jeff about the badge hardware, production, and add-on work. TROOPERS19 badge hardware source · Open KiCad schematic, layout, gerbers, and assembly-data repository linked from the hardware post.

Sources

GitHub: fuccs-shitty-addon-hw Retrieved 2026-05-15 · Source repository for the Fuccs Shitty Addon. GitHub: tr19-badge-hw-public Retrieved 2026-05-15 · Primary design-file repository for the TROOPERS19 badge. Insinuator: Troopers 19 Badge Hardware Retrieved 2026-05-15 · Primary source for hardware specs, design history, add-on context, and production caveats. TROOPERS: TROOPERS19 Retrieved 2026-05-15 · Official event context.