How to Make Bluetooth Controlled Car using Arduino Nano, L298N and HC-05 Module

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INTRODUCTION

In this project, we will build a Bluetooth Controlled Car using Arduino Nano, L298N motor driver, and HC-05 Bluetooth module.

This robot can be controlled wirelessly using a mobile app with multiple commands like forward, backward, left, right, and speed control.

WATCH YOUTUBE VIDEO

Watch full making video of Bluetooth Control Car:

COMPONENTS REQUIRED

Item Image	Item Name	Quantity	Buy
	Arduino Nano	1	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}
	L298N Motor Driver	1	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}
	HC-05 Bluetooth Module	1	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}
	DC Motors	2	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}
	Wheels	2	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}
	Battery Pack	1	{getButton} $text={Buy Now} $icon={cart} $color={#007bff}

TOOLS REQUIRED

Image	Tool Name	Quantity	Buy
	Screwdriver	1	{getButton} $text={Buy Tool} $icon={cart} $color={#007bff}
	Wire Cutter	1	{getButton} $text={Buy Tool} $icon={cart} $color={#007bff}
	Hot Glue Gun	1	{getButton} $text={Buy Tool} $icon={cart} $color={#007bff}

APPS AND ONLINE SERVICES

Image	App Name	Access
	Arduino IDE	{getButton} $text={download} $icon={download} $color={#007bff}
	Bluetooth Control App	{getButton} $text={Download} $icon={download} $color={#007bff}

WIRING CONNECTIONS

Arduino Nano ↔ L298N

L298N	Arduino Nano
IN1	Pin 5
IN2	Pin 6
IN3	Pin 10
IN4	Pin 11

Bluetooth Module ↔ Arduino Nano

HC-05	Arduino Nano
VCC	5V
GND	GND
TX	RX
RX	TX

ARDUINO CODE

#define in1 5 #define in2 6 #define in3 10 #define in4 11 #define LED 13 int command; int Speed = 204; void setup() { pinMode(in1, OUTPUT); pinMode(in2, OUTPUT); pinMode(in3, OUTPUT); pinMode(in4, OUTPUT); pinMode(LED, OUTPUT); Serial.begin(9600); } void loop() { if (Serial.available() > 0) { command = Serial.read(); switch (command) { case 'F': forward(); break; case 'B': back(); break; case 'L': left(); break; case 'R': right(); break; case 'S': Stop(); break; } } } void forward() { analogWrite(in1, Speed); analogWrite(in3, Speed); } void back() { analogWrite(in2, Speed); analogWrite(in4, Speed); } void left() { analogWrite(in3, Speed); analogWrite(in2, Speed); } void right() { analogWrite(in4, Speed); analogWrite(in1, Speed); } void Stop() { analogWrite(in1, 0); analogWrite(in2, 0); analogWrite(in3, 0); analogWrite(in4, 0); }

WORKING PRINCIPLE

The Bluetooth module receives commands from the mobile app and sends them to Arduino Nano. Arduino processes the commands and controls the motors using L298N driver.

TIPS

• Check baud rate (9600)
• Use correct TX-RX connections
• Adjust speed values if needed

CONCLUSION

This project helps you learn wireless communication and robot control using Arduino Nano.