Case study

BMW iDrive: interpreting F44 controller CAN messages

BMW iDrive Controller CAN Bus Interpreter decodes controls from an F44 iDrive controller using an ESP32-C3 and TJA1441A/B CAN transceiver. It reports knob rotation, joystick directions, button and touch states, and brightness commands at 500 kbps. The README also records unresolved touchpad decoding and CAN wake-up behavior.

Targets: Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-08

Stars: 26
Last commit: 2026-03-03
Language: C++
License (GitHub): MIT

GitHub data as of 2026-11-09

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Requirements & limits

Prerequisites: An Adafruit QT Py ESP32-C3, TJA1441A/B transceiver, and BMW F44 iDrive controller are specified.
Limits: The touchpad stream is not decoded and CAN wake-up is not working.
License: MIT license.

Cite

BibTeX

@misc{bmw-idrive-can-case,
  title = {{BMW iDrive: interpreting F44 controller CAN messages}},
  howpublished = {\url{https://github.com/LeanWasTaken/iDrive}},
  url = {https://github.com/LeanWasTaken/iDrive},
  urldate = {2026-11-08},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/bmw-idrive-can-case/}}
}

Plain text

BMW iDrive: interpreting F44 controller CAN messages. https://github.com/LeanWasTaken/iDrive (accessed 2026-11-08). Awesome REA entry: https://awesomerea.org/resources/bmw-idrive-can-case/

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Primary sources

README.md GitHub · LeanWasTaken/iDrive · Revision d9789d1