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Arduino DIY Mobile Bluetooth (HC-05) Controlled RC Car

This project is going to tell you How to make a HC-05 Bluetooth Controlled Car at home (DIY Tesla), controlled by a smart phone application.

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Arduino DIY Mobile Bluetooth (HC-05) Controlled RC Car

Things used in this project

Hardware components

Arduino UNO
Arduino UNO
×1
L293D Motor Driver for Arduino
×1
HC-05 Bluetooth Module
HC-05 Bluetooth Module
×1
DC Motor, 12 V
DC Motor, 12 V
Dc Motor 9V and Wheel
×4
18650 Li-lion Battery
×1
Battery Holder, 18650 x 2
Battery Holder, 18650 x 2
×1
Slide Switch
Slide Switch
×1
Jumper wires (generic)
Jumper wires (generic)
×1

Software apps and online services

Arduino IDE
Arduino IDE
AFMotor.h Library
Bluetooth Electronics App

Story

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Schematics

Circuit Diagram

Connection of HC-05
Hook the GND pin (Negative Pin) of HC-05 to Pin GND of Arduino.
Connect VCC Pin (Positive Pin) of HC-05 to VCC of Arduino.
Connect TX pin (Data Transfer Pin) of HC-05 to RX pin of Arduino.
Connect RX Pin of HC-05 to TX Pin of Arduino.

Connection of Motor
Connect Front Left Motor with M1 of L293D Motor Driver.
Connect Front Right Motor with M2 of L293D Motor Driver.
Connect Bottom Left Motor with M3 of L293D Motor Driver.
Connect Bottom Right Motor with M4 of L293D Motor Driver.

Connection of Battery and Switch
Connect 2 18650 Battery Positive Wire with Button and 2 Pin of Button with M+ of L293D
Connection Negative Wire to Power GND of L293D

Code

Code

C/C++
//Note - Disconnect the Bluetooth Module before hiting the upload button otherwise you'll get compilation error message.
//AFMotor Library https://learn.adafruit.com/adafruit-motor-shield/library-install 
//After downloading the library open Arduino IDE >> go to sketch >> Include Libray >> ADD. ZIP Libray >> Select the downloaded 
//ZIP File >> Open it >> Done
//Now You Can Upload the Code without any problem but make sure the bt module isn't connected with Arduino while uploading code



/*
 * Devloper Krishna Agarwal (DIY Inventor)
Coder Krishna Agarwal (DIY Inventor)
Inventor Krishna Agarwal (DIY Inventor)
Idea By Krishna Agarwal (DIY Inventor)
 */
#include <AFMotor.h>
  
//initial motors pin
AF_DCMotor motor1(1, MOTOR12_1KHZ);
AF_DCMotor motor2(2, MOTOR12_1KHZ);
AF_DCMotor motor3(3, MOTOR34_1KHZ);
AF_DCMotor motor4(4, MOTOR34_1KHZ);
  
int val;
int Speeed = 255;

  
void setup()
{
  Serial.begin(9600);  //Set the baud rate to your Bluetooth module.
Serial.println("Krishna");
  Serial.println("Mr.Robo is Redy");
}
void loop(){
  if(Serial.available() > 0){
    val = Serial.read();
      
    Stop(); //initialize with motors stoped
      
          if (val == 'F'){
          forward();
          }
  
          if (val == 'B'){
          back();
          }
  
          if (val == 'L'){
          left();
          }
  
          if (val == 'R'){
          right();
          }
          if (val == 'I'){
          topright();
          }
  
          if (val == 'J'){
          topleft();
          }
  
          if (val == 'K'){
          bottomright();
          }
  
          if (val == 'M'){
          bottomleft();
          }
          if (val == 'T'){
          Stop();
          }
  }
}
           
  
            
  
  
  
void forward()
{
   Serial.println("Forward");
  motor1.setSpeed(Speeed); //Define maximum velocity
  motor1.run(FORWARD); //rotate the motor clockwise
  motor2.setSpeed(Speeed); //Define maximum velocity
  motor2.run(FORWARD); //rotate the motor clockwise
  motor3.setSpeed(Speeed);//Define maximum velocity
  motor3.run(FORWARD); //rotate the motor clockwise
  motor4.setSpeed(Speeed);//Define maximum velocity
  motor4.run(FORWARD); //rotate the motor clockwise
  
  
}
  
void back()
{
 Serial.println("Bacward");
  motor1.setSpeed(Speeed); //Define maximum velocity
  motor1.run(BACKWARD); //rotate the motor anti-clockwise
  motor2.setSpeed(Speeed); //Define maximum velocity
  motor2.run(BACKWARD); //rotate the motor anti-clockwise
  motor3.setSpeed(Speeed); //Define maximum velocity
  motor3.run(BACKWARD); //rotate the motor anti-clockwise
  motor4.setSpeed(Speeed); //Define maximum velocity
  motor4.run(BACKWARD); //rotate the motor anti-clockwise
}
  
void left()
{
 Serial.println("Left");
 
  motor1.setSpeed(Speeed); //Define maximum velocity
  motor1.run(BACKWARD); //rotate the motor anti-clockwise
  motor2.setSpeed(Speeed); //Define maximum velocity
  motor2.run(BACKWARD); //rotate the motor anti-clockwise
  motor3.setSpeed(Speeed); //Define maximum velocity
  motor3.run(FORWARD);  //rotate the motor clockwise
  motor4.setSpeed(Speeed); //Define maximum velocity
  motor4.run(FORWARD);  //rotate the motor clockwise
}
  
void right()
{
  Serial.println("Right");
 motor1.setSpeed(Speeed); //Define maximum velocity
  motor1.run(FORWARD); //rotate the motor clockwise
  motor2.setSpeed(Speeed); //Define maximum velocity
  motor2.run(FORWARD); //rotate the motor clockwise
  motor3.setSpeed(Speeed); //Define maximum velocity
  motor3.run(BACKWARD); //rotate the motor anti-clockwise
  motor4.setSpeed(Speeed); //Define maximum velocity
  motor4.run(BACKWARD); //rotate the motor anti-clockwise
}
  
void topleft(){
  Serial.println("Top Left");
 motor1.setSpeed(Speeed); //Define maximum velocity
  motor1.run(FORWARD); //rotate the motor clockwise
  motor2.setSpeed(Speeed); //Define maximum velocity
  motor2.run(FORWARD); //rotate the motor clockwise
  motor3.setSpeed(Speeed/3.1);//Define maximum velocity
  motor3.run(FORWARD); //rotate the motor clockwise
  motor4.setSpeed(Speeed/3.1);//Define maximum velocity
  motor4.run(FORWARD); //rotate the motor clockwise
}
  
void topright()
{
  Serial.println("Top Right");
 motor1.setSpeed(Speeed/3.1); //Define maximum velocity
  motor1.run(FORWARD); //rotate the motor clockwise
  motor2.setSpeed(Speeed/3.1); //Define maximum velocity
  motor2.run(FORWARD); //rotate the motor clockwise
  motor3.setSpeed(Speeed);//Define maximum velocity
  motor3.run(FORWARD); //rotate the motor clockwise
  motor4.setSpeed(Speeed);//Define maximum velocity
  motor4.run(FORWARD); //rotate the motor clockwise
}
  
void bottomleft()
{
  Serial.println("Botom Left");
 motor1.setSpeed(Speeed); //Define maximum velocity
  motor1.run(BACKWARD); //rotate the motor anti-clockwise
  motor2.setSpeed(Speeed); //Define maximum velocity
  motor2.run(BACKWARD); //rotate the motor anti-clockwise
  motor3.setSpeed(Speeed/3.1); //Define maximum velocity
  motor3.run(BACKWARD); //rotate the motor anti-clockwise
  motor4.setSpeed(Speeed/3.1); //Define maximum velocity
  motor4.run(BACKWARD); //rotate the motor anti-clockwise
}
  
void bottomright()
{
  Serial.println("Bottom Right");
 motor1.setSpeed(Speeed/3.1); //Define maximum velocity
  motor1.run(BACKWARD); //rotate the motor anti-clockwise
  motor2.setSpeed(Speeed/3.1); //Define maximum velocity
  motor2.run(BACKWARD); //rotate the motor anti-clockwise
  motor3.setSpeed(Speeed); //Define maximum velocity
  motor3.run(BACKWARD); //rotate the motor anti-clockwise
  motor4.setSpeed(Speeed); //Define maximum velocity
  motor4.run(BACKWARD); //rotate the motor anti-clockwise
}
  
  
void Stop()
{
 Serial.println("Stop");
 
  motor1.setSpeed(0); //Define minimum velocity
  motor1.run(RELEASE); //stop the motor when release the button
  motor2.setSpeed(0); //Define minimum velocity
  motor2.run(RELEASE); //rotate the motor clockwise
  motor3.setSpeed(0); //Define minimum velocity
  motor3.run(RELEASE); //stop the motor when release the button
  motor4.setSpeed(0); //Define minimum velocity
  motor4.run(RELEASE); //stop the motor when release the button
}

Credits

DIY Inventor

DIY Inventor

0 projects • 15 followers
Hello Guys, My name is Krishna Agarwal , and I'm passionate about Making DIY Projects. Here I make Arduino and Robotics related projects.

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Related channels and tags
  • Home Automation
  • Robotics