I am compiling here the documentation to create a device that allows using a 2012 Camaro as a game controller.

Important: This is an experiment, there is no guarantee that it will work or that it will not cause damage to the car or other equipment.

(Click on the image)

• Car: 2012 Chevrolet camaro. It should work with any 5gen Camaro.
• Computer: Any Windows/Linux(?) computer that is able to handle a XBOX USB controller. See ArduinoXInput for more informations
• Controller: An Arduino pro micro or any arduino board with a ATmega32U4 MCU.
• CAN shield: A MCP2515 breakout board. (I like this one because it works with 5V and 3.3V)
• OBD2 connector: A simple OBD2 connector.

Sparkfun Arduino pro micro hookup guide

1. Install Arduino IDE
2. Add the sparkfun Arduino pro micro board
3. Install the libraries dependencies (from the libraries manager): ArduinoXInput, Arduino-MCP2515
4. Important: Follow the instructions and install the XInput boards from the ArduinoXInput library.
   (Failure to follow these instructions will result in the device not functioning and potentially bricking your Arduino board.)
5. Flash the CamaroGamePad.ino sketch to the arduino

• ESP32-DevkitC board
• The same MCP2515 breakout board as before
  • with SPI pin 5 (CS) and pin 21 (INT)
  • with OBD2 pin 6 (CAN-H) and pin 14 (CAN-L)

• Flash the ESP32 board with the canhacker.ino sketch
• SavvyCan with custom build (See collin80/SavvyCAN#764)
• Configure a new connection :
  • LAWICEL
  • Serial Port Speed : 2000000
  • CAN Bus Speed : 500000

For now, here's what I've found (CAMARO 2012):

Brake:

• CAN id: 0x0BE
• Index: 1
• Size: 1 byte
• Value: [0-255]
• Unit: %

Accelerator:

• CAN id : 0x1A1
• Index: 6
• Size: 1 byte
• Value: [0-255]
• Unit: %

Steering wheel:

• CAN id : 0x1E5
• Index: 5,6
• Size: 2 bytes
• Value: [-9000:9000]
• Unit: degrees * 10

If you've identified any other useful IDs, let me know.

• https://www.csselectronics.com/pages/obd2-explained-simple-intro
• https://www.camaro5.com/forums/showpost.php?p=10072820&postcount=4
• https://docs.google.com/spreadsheets/d/1pFdixF6W0XK4SR6pXHIlZaFRo9qM5XmAWOK7JcAQdDM/htmlview
• https://forum.realdash.net/t/multi-bus-data-with-obdlink-ex/3872
• https://pinoutguide.com/CarElectronics/gm_car_obd_ii_pinout.shtml