🚗 Voice-Controlled In-Vehicle System

Electronics Engineering Project — Year 3, Term 2

A voice-controlled in-vehicle infotainment and control system built with Arduino, CAN Bus communication (MCP2515), and a TFT display. The system allows drivers to interact with in-car functions hands-free through voice commands, with data transmitted between nodes via the CAN protocol.

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📋 Table of Contents

• Overview
• Features
• Hardware Requirements
• System Architecture
• Repository Structure
• Getting Started
• CAN Bus Configuration
• Dependencies & Libraries
• Authors

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Overview

This project implements a voice-controlled interface for an in-vehicle system. A microcontroller receives voice commands, processes them, and transmits control signals over a CAN Bus network to peripheral nodes (e.g., display unit, actuator controllers). The system mirrors how modern automotive ECUs communicate — reliably and in real time.

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Features

• 🎙️ Voice Command Recognition — Hands-free control of in-vehicle functions
• 🖥️ TFT Display Output — Visual feedback rendered on a TFT screen
• 🔗 CAN Bus Communication — Inter-node messaging via MCP2515 CAN controller (CAN 2.0B)
• ⚡ Real-Time Data Transmission — Low-latency message passing between system nodes
• 🔧 Modular Node Design — Separate transmitter and receiver nodes connected via CAN_H / CAN_L

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Hardware Requirements

Component	Description
Arduino (Uno / Mega)	Main microcontroller for each node
MCP2515 Module	CAN Bus controller with TJA1050 transceiver
TFT Display	Visual output screen (ILI9341 or compatible)
Microphone / Voice Module	Voice input capture
Jumper Wires & Breadboard	Prototyping connections
120Ω Resistor	CAN Bus line termination (one per bus end)

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System Architecture

┌─────────────────────┐         CAN Bus          ┌─────────────────────┐
│   Voice Input Node  │  ───── CAN_H / CAN_L ─── │ Display/Output Node │
│                     │                          │                     │
│  Microphone         │                          │  TFT Display        │
│                     │                          │                     │
│  MCP2515 (TX)       │                          │  Sn65hvd230 (RX)    │
└─────────────────────┘                          └─────────────────────┘

• Node 1 (Transmitter): Captures and processes voice commands, encodes them as CAN frames, and transmits over the bus.
• Node 2 (Receiver): Receives CAN frames, decodes commands, and updates the TFT display or triggers corresponding actions.

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Repository Structure

Voice-Controlled-In-Vehicle-System/
├── Code/               # Arduino source code for all nodes
├── Document/           # Project documentation, reports, schematics
├── .vscode/            # VS Code workspace settings
├── .gitignore
└── Readme.md

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Getting Started

1. Clone the Repository

git clone https://github.com/EARTHISALWAYSHAPPY/Voice-Controlled-In-Vehicle-System.git
cd Voice-Controlled-In-Vehicle-System

2. Install Required Libraries

In the Arduino IDE, go to Sketch → Include Library → Manage Libraries and install:

• mcp2515 — by autowp (CAN Bus controller)
• TFT_eSPI or Adafruit GFX — for TFT display

3. Wire the Hardware

MCP2515 → Arduino SPI Wiring:

MCP2515 Pin	Arduino Pin
VCC	5V
GND	GND
CS	10
MOSI	11 (MOSI)
MISO	12 (MISO)
SCK	13 (SCK)
INT	2

Connect CAN_H and CAN_L between both MCP2515 modules. Add a 120Ω termination resistor across CAN_H and CAN_L on one end of the bus.

4. Upload the Code

• Open the transmitter sketch from Code/ and upload to Node 1 (Arduino)
• Open the receiver sketch from Code/ and upload to Node 2 (Arduino)
• Open Serial Monitor at the appropriate baud rate to observe communication

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CAN Bus Configuration

The MCP2515 is configured to communicate using the CAN 2.0B standard:

mcp2515.reset();
mcp2515.setBitrate(CAN_500KBPS, MCP_8MHZ);
mcp2515.setNormalMode();

CAN frames carry encoded voice command data in the data[] payload field and are identified by a unique can_id per command type.

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Dependencies & Libraries

Library	Purpose	Source
arduino-mcp2515	CAN Bus controller driver	autowp/arduino-mcp2515
TFT_eSPI	TFT display rendering	Bodmer/TFT_eSPI
SPI.h	SPI communication (built-in)	Arduino Standard Library

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Authors

Developed as part of the Electronics Engineering Year 3 Term 2 curriculum.

• @EARTHISALWAYSHAPPY

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License

This project is for educational purposes. Please refer to the repository for any licensing details.