A Reverse Guidance System for Automobiles Using CAN Protocol

This paper presents a low-cost, Arduino-based reverse guidance system for automobiles, utilizing the Controller Area Network (CAN) protocol for reliable communication. Designed for challenging reverse parking scenarios due to limited visibility, the system incorporates three HC-SR04 ultrasonic sensors, two MCP2515 CAN controller modules, two Arduino UNO boards, a 0.96-inch OLED display, and a buzzer. Sensors detect rear obstacles, sending proximity data via CAN frames to the display unit, providing both visual and auditory feedback to the driver. The communication relies on standard CAN frames with firmware-based encoding and decoding logic. A functional prototype was successfully implemented, with the complete design and source code available on GitHub:https://github.com/Amazing-Stardom/arduino-reverse-car-can-system. This solution offers an affordable and practical reverse guidance system for entry-level vehicles.