bluetooth

#define speedofcar 150 //the speed of the motors

#define rightspeed 5 //this is the pin beside the in1 //must be connected to digital pin with the sine wave
#define leftspeed 10 //this is the pin beside the in4 //don't need to be written in the void setup

#define in1 6
#define in2 7
#define in3 8
#define in4 9

void setup()
{
  Serial.begin(9600);
  for (int i = 6; i <= 9; i++)
  {
    pinMode(i, OUTPUT);
  }
}


void forward();
{
  digitalWrite(in1,); //according to the battery and motor test
  digitalWrite(in1,);
  digitalWrite(in1,);
  digitalWrite(in1,);
  analogWrite(leftspeed, speedofcar);
  analogWrite(rightspeed, speedofcar);
}

void backward();
{
  digitalWrite(in1,); //according to the battery and motor test
  digitalWrite(in1,);
  digitalWrite(in1,);
  digitalWrite(in1,);
  analogWrite(leftspeed, speedofcar);
  analogWrite(rightspeed, speedofcar);
}

void right();
{
  digitalWrite(in1,); //according to the battery and motor test
  digitalWrite(in1,);
  digitalWrite(in1,);
  digitalWrite(in1,);
  analogWrite(leftspeed, speedofcar);
  analogWrite(rightspeed, speedofcar);
}

void left();
{
  digitalWrite(in1,); //according to the battery and motor test
  digitalWrite(in1,);
  digitalWrite(in1,);
  digitalWrite(in1,);
  analogWrite(leftspeed, speedofcar);
  analogWrite(rightspeed, speedofcar);
}

void stopp();
{
  digitalWrite(in1, 0); //according to the battery and motor test
  digitalWrite(in1, 0);
  digitalWrite(in1, 0);
  digitalWrite(in1, 0);
  analogWrite(leftspeed, speedofcar);
  analogWrite(rightspeed, speedofcar);
}



void loop() //bluetooth code
{
  if (Serial.available() > 0)
  {
    char x = Serial.read();
    switch (x)
    {
      case 'F': forward(); break;
      case 'B': backward(); break;
      case 'R': right(); break;
      case 'L': left(); break;
      case 'S': stopp(); break;

    }
  }
}