Top 4 C++ Car Projects

stuntrally

2 587 7.8 C++

Note: development continues in stuntrally3. 3D racing game based on VDrift and OGRE with own Track Editor. The main repository with Stunt Rally 2.x sources and data.
ELMduino

9 555 7.9 C++

Arduino OBD-II Bluetooth Scanner Interface Library for Car Hacking Projects

Project mention: Connecting esp32 to a bluetooth ODB2sensor | /r/arduino | 2023-05-23

Coding: You'll need to communicate with the OBD2 scanner somehow. Check out the ELMduino library which is designed to talk to the OBD2 scanner via ELM327 Bluetooth adapters. You might need to read through the library documentation and understand how to send/receive data.

WorkOS

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RejsaCAN-ESP32

2 480 9.0 C++

ESP32 and ESP32-S3 board with CAN interface, runs on 12V power (with auto shutdown)

Project mention: [Help] Arduino and OBD2? | /r/arduino | 2023-06-23

Maybe you can find some inspiration here, even if it's based on Esp32 https://github.com/MagnusThome/RejsaCAN-ESP32

RejsaRubberTrac

3 106 1.3 C++

RejsaRubberTrac - A wireless thermal camera for monitoring tire temperatures

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).