OBD2_data_export

Arduino sketch for exporting vehicle telemetry over Serial via the OBD-II CAN bus.

Features

• Initializes MCP2515-based CAN interface at 500 kbps and sets masks/filters for ECU responses.
• Functions to request and parse standard PIDs:
  • Vehicle speed
  • Engine RPM
  • Accelerator pedal position
• Reads brake status from an analog input.
• loop() queries these values and prints formatted data /S<speed>/R<rpm>/P<pedal>/B<brake> over Serial.

Hardware

• Requires a board with an MCP2515 CAN controller (e.g., CANBed, CAN Bus Shield).
• Tested with: Longan Labs RP2040 CANBed
• Uses SPI_CS_PIN to select the CAN controller (default 9).
• BRAKE_PIN (A1) monitors a brake switch.

Usage

1. Connect the hardware to the vehicle's OBD-II port.
2. Compile and upload OBD2_data_export.ino to the microcontroller.
3. Open the Serial Monitor at 115200 baud to view the telemetry output.

Demo Videos

• OBD and brake signal test via Arduino IDE Serial Monitor
• OBD and brake signal test with Python reading Serial data