Series

Gulaschprogrammiernacht

Entropia's Karlsruhe hacker gathering, represented by the source-backed GPN17 electronic GulaschPushNotifier badge, Hack-the-Badge ecosystem, and GPN20 laminated identity-badge workflow.

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Events

Gulaschprogrammiernacht 17 2017 · Germany · 1 badge(s) Gulaschprogrammiernacht 20 2022 · Germany · 1 badge(s) Gulaschprogrammiernacht 23 2025 · Germany · 1 badge(s)

Lineage Notes

Entropia's Karlsruhe hacker gathering, represented by the source-backed GPN17 electronic GulaschPushNotifier badge, Hack-the-Badge ecosystem, and GPN20 laminated identity-badge workflow.

Use the badge cards below for sourced hardware, software, lore, issues, add-ons, and author credits.

Badges

Seeded records

Gulaschprogrammiernacht 17 · 2017

GPN17 Badge

ESP8266 GulaschPushNotifier badge

An Entropia-produced Gulaschprogrammiernacht 17 badge built around ESP8266, a 128x128 LCD, 18650 power, sensors, WS2813 LEDs, IR, a ROM store, and Hack-the-Badge camp challenges.

Gulaschprogrammiernacht 20 · 2022

GPN20 Laminated Identity Badge

On-site printed and laminated attendee badge

A source-backed non-electronic GPN20 attendee-badge record anchored by the Entropia wiki workflow for printing and laminating badges at the infodesk.

Gulaschprogrammiernacht 23 · 2025

GPN23 Identity Badge

Printed attendee badge, lanyard, and safeR badge workflow

A source-backed non-electronic GPN23 badge record for the printed attendee badges and lanyard workflow documented by Entropia's FAQ and badge how-to.