how to make arduino bluetooth car

MATERIALS NEEDED

CHASIS

ARDUINO (UNO) 

BLUETOOTH MODULE (HC-O5)

SOME JUMPER WIRES 

BATTERY 

4x TYRES

4X BO GEAR MOTOR

Ln298 motor driver

PROCEDURE

1. Fix box motors in the chassis and tyres in the motors and solder one pin with red wire and another pin with black pin. 

2. Join the wires in parallel and connect it to motor driver. 

3. Use jumper wires and connect arduino to motor driver and battery also

4.by circuit given below

5.check the code and adjust pin numbers 

CODE

/******************* Robot Remote Control Mode - L298N 2A ********************/

// connections for drive Motor FR & BR

int enA = 9;

int in1 = 7;

int in2 = 6;

// connections for drive Motor FL & BL

int in3 = 5;

int in4 = 4;

int enB = 3;

const int buzPin = 2;  // set digital pin 2 as buzzer pin (use active buzzer)

const int ledPin = A5;  // set digital pin A5 as LED pin (use super bright LED)

int valSpeed = 255;

String readString;  // declaring string

void setup(){

  Serial.begin(115200);    // set up Serial library at 115200 bps

  Serial.println("*Robot Remote Control Mode - L298N 2A*");

 

  pinMode(buzPin, OUTPUT);  // sets the buzzer pin as an Output

  pinMode(ledPin, OUTPUT);  // sets the LED pin as an Output

  // Set all the motor control pins to outputs

  pinMode(enA, OUTPUT);

  pinMode(enB, OUTPUT);

  pinMode(in1, OUTPUT);

  pinMode(in2, OUTPUT);

  pinMode(in3, OUTPUT);

  pinMode(in4, OUTPUT);

  // Set the speed to start, from 0 (off) to 255 (max speed)

  analogWrite(enA, valSpeed);

  analogWrite(enB, valSpeed);

  

  // Turn off motors - Initial state

  digitalWrite(in1, LOW);

  digitalWrite(in2, LOW);

  digitalWrite(in3, LOW);

  digitalWrite(in4, LOW);

}

void loop() {

  while (Serial.available() > 0) {

     char command = Serial.read();    // gets one byte from serial buffer

     Serial.println(command);

    switch(command){

    case 'F':   // move forward

        SetSpeed(valSpeed);

        digitalWrite(in1, HIGH);

        digitalWrite(in2, LOW);

        digitalWrite(in3, HIGH);

        digitalWrite(in4, LOW);

        break;

    case 'B':   // move backward

        SetSpeed(valSpeed);

        digitalWrite(in1, LOW);

        digitalWrite(in2, HIGH);

        digitalWrite(in3, LOW);

        digitalWrite(in4, HIGH);

        break;

    case 'R':   // turn right

        SetSpeed(valSpeed);

        digitalWrite(in1, LOW);

        digitalWrite(in2, HIGH);

        digitalWrite(in3, HIGH);

        digitalWrite(in4, LOW);

        break;

    case 'L':   // turn left

        SetSpeed(valSpeed);

        digitalWrite(in1, HIGH);

        digitalWrite(in2, LOW);

        digitalWrite(in3, LOW);

        digitalWrite(in4, HIGH);

        break;

    case 'G':   // forward left

        analogWrite(enB, valSpeed/4);

        digitalWrite(in1, HIGH);

        digitalWrite(in2, LOW);

        digitalWrite(in3, HIGH);

        digitalWrite(in4, LOW);

        break;

    case 'H':   // backward left

        analogWrite(enB, valSpeed/4);

        digitalWrite(in1, LOW);

        digitalWrite(in2, HIGH);

        digitalWrite(in3, LOW);

        digitalWrite(in4, HIGH);

        break;

    case 'I':   // forward right

        analogWrite(enA, valSpeed/4);

        digitalWrite(in1, HIGH);

        digitalWrite(in2, LOW);

        digitalWrite(in3, HIGH);

        digitalWrite(in4, LOW);

        break;

    case 'J':   // backward right

        analogWrite(enA, valSpeed/4);

        digitalWrite(in1, LOW);

        digitalWrite(in2, HIGH);

        digitalWrite(in3, LOW);

        digitalWrite(in4, HIGH);

        break;

    case 'S':   // stop

        digitalWrite(in1, LOW);

        digitalWrite(in2, LOW);

        digitalWrite(in3, LOW);

        digitalWrite(in4, LOW);

        break;

    case 'V':   // beep buzzer

        digitalWrite(buzPin, HIGH);

        delay(150);        

        digitalWrite(buzPin, LOW);

        delay(100);        

        digitalWrite(buzPin, HIGH);

        delay(250);        

        digitalWrite(buzPin, LOW);

        break;

    case 'W':   // turn light on

        digitalWrite(ledPin, HIGH);

        break;

    case 'w':   // turn light off

        digitalWrite(ledPin, LOW);

        break;

    case '0':   // set speed motor to 0 (min)

        SetSpeed(0);

        break;

    case '1':   // set speed motor to 30

        SetSpeed(30);

        break;

    case '2':   // set speed motor to 55

        SetSpeed(55);

        break;

    case '3':   // set speed motor to 80

        SetSpeed(80);

        break;

    case '4':   // set speed motor to 105

        SetSpeed(105);

        break;

    case '5':   // set speed motor to 130

        SetSpeed(130);

        break;

    case '6':   // set speed motor to 155

        SetSpeed(155);

        break;

    case '7':   // set speed motor to 180

        SetSpeed(180);

        break;

    case '8':   // set speed motor to 205

        SetSpeed(205);

        break;

    case '9':   // set speed motor to 230

        SetSpeed(230);

        break;

    case 'q':   // set speed motor to 255 (max)

        SetSpeed(255);

        break;

    } 

  }

}

// function for setting speed of motors

void SetSpeed(int val){

  valSpeed = val;

  analogWrite(enA, valSpeed);

  analogWrite(enB, valSpeed);

}