Bluetooth Controlled
Robotic Car

The Bluetooth Controlled Robotic Car is one of the most popular projects at NextGenRoboticX. It teaches the fundamentals of wireless serial communication using the HC-05 Bluetooth Module and the Arduino Uno microcontroller.

This project guides you through designing a system where your smartphone acts as a powerful transmitter, sending commands to the robot via a custom-built Android app. Learn how to process serial data and drive high-torque motors with precision.

• Robust Bluetooth Connectivity (HC-05)
• Arduino Uno Processing Power
• Interactive Android App Interface
• Multi-directional Movement Control

Hardware Specification

Industrial-grade components for reliable performance.

• Arduino Uno: The industry-standard microcontroller board for prototyping. Robust, easy to program, and perfectly suited for motor control.
• HC-05 Module: A reliable Bluetooth serial port profile (SPP) module designed for transparent wireless serial connection setup.
• L298N Driver: A dual-channel H-bridge motor driver that allows you to control the speed and direction of two DC motors independently.
• DC Gear Motors: High-torque 200RPM 12V DC motors providing the necessary power for smooth navigation on various surfaces.

Circuit Guidelines

Ensure proper voltage regulation for the HC-05 module (3.3V logic level) and high current supply for the motors. Check all polarities before powering up.

Source Code

// Bluetooth Controlled Robotic Car - NextGenRoboticX
#include <SoftwareSerial.h>

char command;

void setup() {
  Serial.begin(9600); // Bluetooth default baud rate
  pinMode(13, OUTPUT); // Status LED
  // ... Initialize Motor Pins ...
}

void loop() {
  if (Serial.available() > 0) {
    command = Serial.read();
    
    switch(command) {
      case 'F': moveForward(); break;
      case 'B': moveBackward(); break;
      case 'L': turnLeft(); break;
      case 'R': turnRight(); break;
      case 'S': stopRobot(); break;
    }
  }
}