Motor control using HC-05 and Matlab

//Standard PWM DC control
int E1 = 5;     //M1 Speed Control
int E2 = 6;     //M2 Speed Control
int E3 = 11;    //M3 Speed Control
int M1 = 4;     //M1 Direction Control
int M2 = 7;     //M2 Direction Control
int M3 = 9;    //M3 Direction Control
int val = 0;
void setup(void) 
{ 
  Serial1.begin(9600);
}
void loop() 
{
  if(Serial1.available() > 0){
    val = Serial1.read();
      switch(val)
      {
        if (val==1)
        {
          analogWrite(E1,HIGH);
        }
        if (val==0)
        {
          analogWrite(E1,LOW);
        }
      }
  }
}

b = Bluetooth ('HC-05',1);
fopen(b);
fwrite(b,1);