Bluetooth Controlled RC Car

A mobile controlled robotic car built using Arduino Nano, L298N motor driver and HC-05 Bluetooth module.
The car receives serial commands from an Android application and drives accordingly.

Features

• Forward, backward, left and right movement
• Real-time Bluetooth control
• Simple serial command protocol
• Works with any generic Bluetooth controller app
• Powered by Li-Po battery

Hardware Components

• Arduino Nano
• L298N 2A Dual Motor Driver
• HC-05 Bluetooth Module
• 2 DC Gear Motors
• 7.4V Li-Po Battery
• Chassis and wheels
• Jumper wires and switch

Pin Connections

Motor Driver → Arduino Nano

L298N Pin	Arduino Pin
IN1	D11
IN2	D10
IN3	D9
IN4	D8

HC-05 → Arduino

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

Control Commands

Command	Action
F	Move Forward
B	Move Backward
L	Turn Left
R	Turn Right
S	Stop

How to Use

1. Upload src/rc_car.ino to Arduino Nano
2. Pair HC-05 with mobile (default PIN: 1234)
3. Open Bluetooth controller app
4. Send commands F, B, L, R, S to control the car

Future Scope

• PWM speed control
• Obstacle avoidance
• Custom Android app
• ESP32 upgrade

Author

Het Patel
College Project – Robotics Competition