// PROGRAM: Bluetooth Buzzer

int B=10;               // BUZZER PIN
void setup()
{
    Serial.begin(9600);
    pinMode(B,OUTPUT);
}
void loop()
{
    if(Serial.available())
    {
        int S = Serial.read();
        if(S=='1')
        {
            digitalWrite(B,HIGH);
        }
        else
        {
            digitalWrite(B,LOW);
            Serial.write("UNAVAILABLE");
        }   
     }
}