Reverse Guidance System for Automobiles using CAN Protocol

This project presents an Arduino-based reverse parking assistance system for older vehicles that lack modern parking sensors. It uses the Controller Area Network (CAN) protocol to enable real-time communication between two modules: a Sensor Node and a Display Node.

The system provides both visual (OLED) and auditory (buzzer) alerts based on obstacle proximity using HC-SR04 ultrasonic sensors.

---

System Overview

• Sensor Node:
  • 3 × HC-SR04 ultrasonic sensors
  • Arduino UNO
  • MCP2515 CAN controller
• Display Node:
  • Arduino UNO
  • MCP2515 CAN controller
  • OLED 0.96" display
  • Buzzer

Communication is done over a twisted-pair CAN Bus at 125 kbps.

---

Hardware Connections

Sensor Node:

• HC-SR04 sensors → Digital I/O pins
• MCP2515 (SPI):
  • MOSI → D11
  • MISO → D12
  • SCK → D13
  • CS → D10
• CAN H/L lines → twisted pair with 120Ω termination

Display Node:

• OLED (I2C):
  • SDA → A4
  • SCL → A5
• Buzzer → Digital output pin
• MCP2515 connected as above

Ensure both nodes share a common GND and 5V supply.

---

Setup Instructions

1. Clone the repository:

git clone git@github.com:Amazing-Stardom/arduino-reverse-car-can-system.git

2. Open Arduino IDE and install:

   • mcp_can library
   • Adafruit_SSD1306 and Adafruit_GFX libraries

3. Upload the correct sketch:

   • sender_node.ino to the Sensor Node
   • display_node.ino to the Display Node

4. Power both Arduinos. The system will automatically start sending and displaying proximity data.

---

Demonstration

Display Output Example:

Breadboard Prototype:

Buzzer beeps faster as the object gets closer. OLED shows increasing vertical bars for proximity.

---

Code & Folder Structure

arduino-reverse-car-can-system/
├── Arduino_Code/
│   ├── display_node/display_node.ino
│   └── sender_node/sender_node.ino
├── img/
│   ├── figure-1.png  → Block Diagram
│   ├── figure-2.jpeg to figure-6.png → Results and Setup
├── reverse-guide-system-for-automobiles-using-can-protocol.docx
└── README.md

---

📄 Paper

The complete research documentation is available in:

• reverse-guide-system-for-automobiles-using-can-protocol.docx

---

License

• Code: MIT License
• Diagrams & Documentation: CC-BY 4.0

---

DOI

This project will be archived on Zenodo for citation. 📌 DOI link: To be added after upload