Case study

GarminHRM600: reconstructing HRM 600 BLE and stored-file exchanges

GarminHRM600 implements a direct BLE client for the Garmin HRM 600 heart-rate strap using documented Multi-Link, GFDI and protobuf FileSyncService exchanges. Its CLI streams heart rate and Running Dynamics, downloads stored FIT files and reconstructs absolute timestamps from the strap's event clock and file identifiers. A protocol reference records message layouts and the author's probe results.

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: 2026-08-30
Language: Python

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: Python 3.12 or newer and a BLE-capable machine; developed and tested on macOS.
Prerequisites: A worn HRM 600 strap that is disconnected from other central devices; first connection requires pairing.
Testing evidence: The author reports hardware testing with HRM 600 firmware 5.20.0.
License: MIT License; adapted portions retain attribution under the upstream MIT terms.

Cite

BibTeX

@misc{garminhrm600-case,
  title = {{GarminHRM600: reconstructing HRM 600 BLE and stored-file exchanges}},
  howpublished = {\url{https://github.com/mskerwiderski/GarminHRM600}},
  url = {https://github.com/mskerwiderski/GarminHRM600},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/garminhrm600-case/}}
}

Plain text

GarminHRM600: reconstructing HRM 600 BLE and stored-file exchanges. https://github.com/mskerwiderski/GarminHRM600 (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/garminhrm600-case/

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About this entry

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Primary sources

README.md GitHub · mskerwiderski/GarminHRM600 · Revision c48b98e
docs/gfdi-filetransfer.md GitHub · mskerwiderski/GarminHRM600 · Revision c48b98e