Case study

DIY Saab 9-3 Tachometer: decoding CAN signals for RPM and speed

DIY Saab 9-3 Tachometer investigates a 2007 Saab 9-3 CAN bus by logging traffic during controlled driving maneuvers and plotting bytes grouped by message ID. The author associates RPM with bytes 2–3 of 0x110 and vehicle speed with byte pairs in 0x280, then uses those signals for a Raspberry Pi display and gear estimate.

Targets: Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06

Stars: 14
Last commit: 2019-10-29
Language: Python

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: The documented setup uses a 2007 Saab 9-3, an Arduino with CAN shield and a Raspberry Pi.
Limits: The author reports that some CAN signals remain undecoded.
License: No licence file in the repository.

Cite

BibTeX

@misc{diy-saab-9-3-tachometer-case,
  title = {{DIY Saab 9-3 Tachometer: decoding CAN signals for RPM and speed}},
  howpublished = {\url{https://github.com/kosa215/DIY-Saab-9-3-Tachometer}},
  url = {https://github.com/kosa215/DIY-Saab-9-3-Tachometer},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/diy-saab-9-3-tachometer-case/}}
}

Plain text

DIY Saab 9-3 Tachometer: decoding CAN signals for RPM and speed. https://github.com/kosa215/DIY-Saab-9-3-Tachometer (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/diy-saab-9-3-tachometer-case/

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About this entry

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Primary sources

README.md GitHub · kosa215/DIY-Saab-9-3-Tachometer · Revision 399612a