ShaloHAris

const int motorA1  = 13;
 const int motorA2  = 12;
  const int motorB1  = 11;
  const int motorB2  = 10;
  const int buzzer = 5 ;
  int i=0;
  int j=0;
  int state;
  int vSpeed=255;     // Default speed, from 0 to 255

void setup()
{
    pinMode(motorA1, OUTPUT);
    pinMode(motorA2, OUTPUT);
    pinMode(motorB1, OUTPUT);
    pinMode(motorB2, OUTPUT);

    Serial.begin(9600);
}

void loop()
{

    if(Serial.available() > 0){
      state = Serial.read();
    }


  //Fram

    if (state == 'F')
    {
      analogWrite(motorA1, vSpeed);
      analogWrite(motorA2, 0);
      analogWrite(motorB1, vSpeed);
      analogWrite(motorB2, 0);
    }

  //Backa

    else if (state == 'B')
    {
      analogWrite(motorA1, 0);
      analogWrite(motorA2, vSpeed);
      analogWrite(motorB1, 0);
      analogWrite(motorB2, vSpeed);
    }


//Left
    else if (state == 'L')
    {
      analogWrite(motorA1, 0);
      analogWrite(motorA2, 255);
      analogWrite(motorB1, 0);
      analogWrite(motorB2, 0);
    }


  // Höger
    else if (state == 'R')
    {
      analogWrite(motorA1, 0);
      analogWrite(motorA2, 0);
      analogWrite(motorB1, 0);
      analogWrite(motorB2, 255);
    }

  // Ljud
    else if (state == 'V')
    {
      if (j==0){
         tone(buzzer, 1000);//Speaker on
         j=1;
      }
      else if (j==1){
         noTone(buzzer);    //Speaker off
         j=0;
      }
      state='n';
    }


  // Stoppa bilen
    else if (state == 'S'){
        analogWrite(motorA1, 0);  analogWrite(motorA2, 0);
        analogWrite(motorB1, 0);  analogWrite(motorB2, 0);
    }

    }