Arduino CAN Bus Sensor Project

This project demonstrates how to use the CAN bus to transmit sensor data between two Arduino modules. One module reads data from an ultrasonic sensor and an ADXL345 accelerometer and sends it over the CAN bus. The other module receives the data and displays it on an LCD screen.

Overview

• Module 1: Sensor Data Transmission

  • Reads data from an ultrasonic sensor and an ADXL345 accelerometer.
  • Sends the data over the CAN bus using the MCP2515 CAN controller.

• Module 2: Data Reception and Display

  • Receives CAN bus data.
  • Displays distance and acceleration values on a 20x4 I2C LCD screen.

Hardware Required

• 2 x Arduino boards (e.g., Arduino Uno)
• 2 x MCP2515 CAN Bus Modules
• Ultrasonic Sensor (e.g., HC-SR04)
• ADXL345 Accelerometer Module
• 20x4 I2C LCD Display
• Breadboard and jumper wires
• Power supply (e.g., USB cables)

Setup

1. Wiring

   • Follow the circuit diagrams to connect the components.
   • Module 1 (Sensor Data Transmission):
     • Connect the ultrasonic sensor and ADXL345 to the Arduino.
     • Connect the MCP2515 CAN module via SPI (CS pin to pin 10).
   • Module 2 (Data Reception and Display):
     • Connect the MCP2515 CAN module via SPI (CS pin to pin 10).
     • Connect the 20x4 I2C LCD display to the Arduino.

2. Libraries

   • Install the following Arduino libraries via the Library Manager or download from GitHub:
     • SPI.h: For SPI communication with the MCP2515 CAN controller.
     • Wire.h: For I2C communication with the ADXL345 accelerometer and the LCD display.
     • LiquidCrystal_I2C.h: For controlling the I2C LCD display.
     • mcp2515.h (CAN bus library): For interacting with the MCP2515 CAN bus module.

3. Upload Code

   • Module 1:
     • Upload the Sensor Data Transmission code to the first Arduino.
   • Module 2:
     • Upload the Data Reception and Display code to the second Arduino.

Program Modules

Module 1: Sensor Data Transmission

This module reads data from the ultrasonic sensor and the ADXL345 accelerometer. It packages this data into a CAN message and sends it via the MCP2515 CAN controller.

Module 2: Data Reception and Display

This module receives CAN messages sent by Module 1 and displays the sensor data on a 20x4 I2C LCD.

Graphical Connections

Breadboard Layout

Schematic Diagram

Wiring Connections

MCP2515 CAN Bus Module

MCP2515 Pin	Arduino Pin
VCC	5V
GND	GND
CS	D10
SO	D12
SI	D11
SCK	D13
INT	D2

I2C Device (e.g., 20x4 LCD)

I2C Pin	Arduino Pin
VCC	5V / 3.3 V
GND	GND
SDA	A4
SCL	A5

Ultrasonic Sensor (HC-SR04)

HC-SR04 Pin	Arduino Pin
VCC	5V / 3.3 V
GND	GND
ECHO	D3
TRIG	D4