Add-on dossier
A linkable lifecycle record for hardware expansions, app ecosystems, firmware upgrades, cases, radio parts, and post-event badge experiments.
External ICSP, RX, TX, and reset access made reflashing and serial extension possible, while special RF codes could store text in EEPROM or trigger visual effects.
Badge context
Mirror of Andrew MacPherson's build-time writeup with Arduino/ATmega328, 433 MHz RF, Nokia 5110, battery, pinout, EEPROM, and attendee-hack details.
Hackaday report summarizing the free South African security-conference badge hardware, mesh behavior, 77 final boards, and Maltego visualization.
Source trail
Primary author writeup mirror for design goals, free-conference constraints, RF behavior, pinouts, battery limitations, EEPROM effects, and attendee hacks.
Secondary article source for the South African conference context, ATmega328, Nokia 5110 LCD, 433 MHz RF modules, mesh relationship tracking, 77 final boards, and Maltego visualization.