Arduino Code for Bluetooth Controlled Arduino Car

This is the code for Bluetooth Controlled Arduino Car.


int lm1 = 6;
int lm2 = 9;
int rm1 = 3;
int rm2 = 5;
int horn = 8;

void setup()
{
  //initlize the mode of the pins
   pinMode(lm1,OUTPUT);
   pinMode(lm2,OUTPUT);
   pinMode(rm1,OUTPUT);
   pinMode(rm2,OUTPUT);
   pinMode(horn,OUTPUT);

   //set the serial communication rate
  Serial.begin(9600);
}

void loop()
{
  //check whether arduino is reciving signal or not
  while(Serial.available() == 0);
  char val = Serial.read() ;//reads the signal
  Serial.print(val);

  /*********For Forward motion*********/

  if (val == 'F')
  {
    Serial.println("FORWARD");
    digitalWrite(lm1,HIGH);  digitalWrite(rm1,HIGH);
    digitalWrite(lm2,LOW);       digitalWrite(rm2,LOW);
 
  }


    /*********For Backward Motion*********/
  else if(val == 'B')
  {
  Serial.println("BACK");
      digitalWrite(lm2,HIGH);  digitalWrite(rm2,HIGH);
    digitalWrite(lm1,LOW);       digitalWrite(rm1,LOW);

  }
   /*********Right*********/
  else if(val == 'R')
  {
  Serial.println("RIGHT");
    digitalWrite(lm1,HIGH);  digitalWrite(rm2,HIGH);
    digitalWrite(lm2,LOW);       digitalWrite(rm1,LOW);
  }
   /*********Left*********/
  else if(val == 'L')
  {
   Serial.println("LEFT");
     digitalWrite(lm2,HIGH);  digitalWrite(rm1,HIGH);
    digitalWrite(lm1,LOW);       digitalWrite(rm2,LOW);

  }
   /*********Horn*********/
 else if(val == 'V')
  {
  digitalWrite(horn,HIGH);
  }
else if(val == 'v')
  {
    digitalWrite(horn,LOW);
  }

  /*********STOP*********/
  else
  {
  Serial.println("Invalid!!!");
     digitalWrite(lm1,LOW);  digitalWrite(rm1,LOW);
    digitalWrite(lm2,LOW);       digitalWrite(rm2,LOW);

  }

}