rad1o
CCCamp 2015 SDR badge
A HackRF-inspired software-defined radio badge that let campers receive, transmit, inspect spectrum, flash evolving firmware, solder RF add-ons, and keep hacking long after camp.
Hacker Con Badges
Worldwide hacker con badge compendium. Explore the hardware, firmware and stories behind the badges.
659 badges · 555 events
Badges around the world
Eight starting points across six continents. Every record links back to its sources.
Off-By-One 2024 Hardware Badge
Singapore dual-screen Octopus badge
Off-By-One Conference 2024 used an Octopus-themed hardware badge with ESP32-S3 and ATmega328P controllers, dual 128x128 GC9A01 round LCDs, IR, WS2812 LEDs, buttons, a user-flashable MicroPython challenge surface, and six published challenge flags.
Ekoparty 2024 Official Badge
ESP32-C6 LoRa badge
The official Ekoparty 2024 electronic badge documented by Electronic Cats with ESP32-C6 control, RFM95 LoRa radio, OLED display, NeoPixels, USB, buzzer, KiCad hardware files, firmware sources, Badge Connect behavior, and a community Meshtastic variant trail.
NorthSec 2025 Badge
ESP32-C3 conference and CTF badge with SAO and IR pairing
NorthSec 2025's official badge repository documents an ESP32-C3-WROOM-02-N4 badge with eighteen NeoPixel RGB LEDs, five buttons, an IR pairing connector, two SAO v1.69bis connectors, USB-C or AAA battery power, and separate conference/CTF firmware builds.
LCA2017 IoTuz ESP32 Board
linux.conf.au Open Hardware Miniconf ESP32 badge board
linux.conf.au 2017's Open Hardware Miniconf centered on IoTuz, an ESP32-based custom board documented by the official schedule, CCHS Melbourne hardware and firmware repositories, workshop setup notes, and attendee driver work.
BSides Cape Town 2016 Badge
ESP8266 IR faction-game badge
A BSides Cape Town 2016 badge built around ESP8266, 128x64 OLED display, eight UI buttons, rear reset and program buttons, IR transmit and receive, level LEDs, faction RGB LED, USB-charged 600 mAh LiPo, schedule UI, challenges, and an organic faction game.
flow3r
CCCamp 2023 music and light badge
A petal-shaped electronic instrument where touch and gestures become sound and light.
DEF CON 27 Badge
Crystal NFMI badge-game platform
A Grand Idea Studio DEF CON 27 badge built around NXP hardware with a KL27 ARM Cortex-M0+ controller, NFMI communication, quartz or crystal face details, role-specific badge identity, public firmware and schematics, and a conference-wide interaction game.
Upcoming and pre-event records
Publicly announced badges are kept separate from the established lineage until shipped hardware and post-event evidence are available.
TenguCon 3.0 Hardware Badge
Planned ESP32-S3 LoRa badge with a QWERTY keyboard, colour display, and IR, sold at the door
A planned hardware badge for TenguCon 3.0, November 19-20, 2026 at Akihabara UDX in Tokyo. The official site lists an ESP32-S3 with a LoRa Ra-01SH module, Wi-Fi, Bluetooth, an IR blaster and receiver, a full QWERTY keyboard, game controls, a colour display, an SD card slot, and 10 addressable RGB LEDs. The Meetup event calls it a custom ESP32-based LoRa platform designed exclusively for the event. It is sold at the venue, cash only, in limited numbers, and is not included in admission.
PhreakNIC 27 Planned MK.II ESL Badge
Pre-event recycled shelf-label badge in a floppy-disk frame with a LEGO-compatible shutter
A pre-event record for the PhreakNIC 27 badge ahead of the November 6-7, 2026 conference in Murfreesboro, Tennessee. Tyler Crumpton's PN26 writeup announced a cooler MK.II electronic shelf-label badge, and the official PhreakNIC site now confirms it: a September 30, 2026 sneak peek describes a new frame, wireless features, a disk slot, and a LEGO-compatible customizable shutter slider; an October 9 schedule entry for his talk Shelf Label 2: Electric Badge-a-loo says the badge is built on the same recycled hardware as PN26's with conference customization, wireless communication, and battery-less operation; and an October 21 Badge Customizer lets attendees design and download STLs for their own floppy-disk shutter. Final electronics, firmware, and handout are not yet documented.
BSidesTLV 2026 Alice Controller Badge
Planned Israeli RP2040 hardware CTF badge
A planned BSidesTLV 2026 electronic badge whose organizer repository, published September 22, 2026, documents the full design ahead of the November 11, 2026 Alice in AI Land conference: the Alice Controller v0.4 RP2040 handheld badge, a separate soldering-kit LED chaser, and the online boulder-pushing puzzle challenge the badge is used to play.
HackerHotel 2027 Badge
Planned Badge.Team badge: ESP32-P4 ambition versus CH643 starfish board in layout
A pre-event record for the February 19-21, 2027 HackerHotel badge. Badge.Team's homepage still advertises LoRa, a keyboard, a big screen, and an ESP32-P4-class processor, while the official badgeteam/hackerhotel2027-hardware repository, under active layout work by Renze Nicolai and Julian Scheffers since September 2026, holds a CERN-OHL-P-2.0 KiCad design for a starfish-shaped CH643 LED-matrix board with infrared and LiPo charging, with a prototype-1 Gerber and assembly package committed on October 22, tagged as the prototype-1 release on October 24, and revised with a horizontal battery connector as prototype-1b on October 26, 2026. Which direction ships is not yet stated.