Sputnik / OpenBeacon
A small active 2.4 GHz RFID badge/tag used with OpenBeacon base stations for real-time camp tracking and post-camp hardware experiments.
Chaos Communication Camp
The camp where Sputnik/OpenBeacon active RFID tags turned attendance itself into a 2.4 GHz tracking and experimentation surface.
Finowfurt Aviation Museum · Germany · 2007
A small active 2.4 GHz RFID badge/tag used with OpenBeacon base stations for real-time camp tracking and post-camp hardware experiments.
Lifecycle
Sputnik/OpenBeacon tags were read by 30+ OpenBeacon base stations installed around the event venue.
The talk describes a memory-stick-sized ARM7 meshing node design, USB power/reprogramming, RP-SMA antenna, and GCC ARM toolchain support for custom firmware.
Operational history
The badge is a useful early case study for badge infrastructure as both playful telemetry and a privacy-sensitive camp artifact.
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.
The page is sourceable, but the image remains empty until a licensed original badge photo is cleared.