Case study

SPORTident SRR: reconstructing the short-range radio link

SPORTident SRR reconstructs the 2.4 GHz radio exchange used by SIAC cards and BSF8-SRR stations to send punches. Its documentation maps CC2500 settings, packet fields, acknowledgements and timing, while an ESP32/CC2500 sketch receives and acknowledges frames and a Python tool decodes captures.

Targets: Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 2
Last commit: 2026-10-07
Language: C++
License (GitHub): MIT

GitHub data as of 2026-11-10

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Evidence

Observed: Code and documentation observed; no download method or demo found.
Checked: 2026-11-08

How evidence classes are assigned

Requirements & limits

Prerequisites: An ESP32 development board and 3.3 V CC2500 module for the reference receiver.
Prerequisites: Arduino IDE with the ESP32 core, or arduino-cli, to build the receiver.
Limits: Some header bytes and retransmission behavior remain unexplained.
License: MIT license for code, documentation and photos.

Cite

BibTeX

@misc{sportident-srr-protocol-case,
  title = {{SPORTident SRR: reconstructing the short-range radio link}},
  howpublished = {\url{https://github.com/open-orienteering/srr-protocol}},
  url = {https://github.com/open-orienteering/srr-protocol},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/sportident-srr-protocol-case/}}
}

Plain text

SPORTident SRR: reconstructing the short-range radio link. https://github.com/open-orienteering/srr-protocol (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/sportident-srr-protocol-case/

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About this entry

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Primary sources

README.md GitHub · open-orienteering/srr-protocol · Revision 0eb5967
docs/protocol.md GitHub · open-orienteering/srr-protocol · Revision 0eb5967