loudhouse

//A sketch to demonstrate the tone() function

//Specify digital pin on the Arduino that the positive lead of piezo buzzer is attached.
int piezoPin = 8;
int inputPin = 5;               // choose the input pin (for PIR sensor)
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;  // variable for reading the pin status

void alarm() {
  int frequency = 100;
  for (int frequency; frequency< 1500; frequency++) {
     tone(piezoPin, frequency, 500);
  }
}
void setup() {
    pinMode(inputPin, INPUT);
    Serial.begin(9600);
}//close setup

void loop() {

  /*Tone needs 2 arguments, but can take three
    1) Pin#
    2) Frequency - this is in hertz (cycles per second) which determines the pitch of the noise made
    3) Duration - how long teh tone plays
  */
  delay(1000);
  val = digitalRead(inputPin);
  if (val == HIGH) {
        // motion detected
        // PLAY THE SOUND
        Serial.println("Motion detected. Sound the alarm!");
        alarm();
        }
        else {
          noTone(piezoPin);
          Serial.println("No motion detected...");
        }

  //tone(piezoPin, 1000, 500);
  //delay(1000);

}