// House Security Alarm using Arduino, Motion Sensor, and Buzzer //
// Christine Alo - BETCPET 3C NS //
// Finals Exams CPET11-M // 

const int motionSensorPin = 3;  
const int buzzerPin = 4;       
const int stopButtonPin = 2;

void setup() {
  pinMode(motionSensorPin, INPUT);  
  pinMode(buzzerPin, OUTPUT);
  pinMode(stopButtonPin, INPUT_PULLUP);
  Serial.begin(9600);
}

void loop() {
  int motionValue = digitalRead(motionSensorPin);

  if (motionValue == HIGH) {
    activateAlarm(); 
  }

  // Check if the stop button is pressed
  if (digitalRead(stopButtonPin) == LOW) {
    stopAlarm(); // Stop the alarm
  }
}

void activateAlarm() {
  Serial.println("Motion detected! Alarm activated.");
  digitalWrite(buzzerPin, HIGH); // Turn on the buzzer
}

void stopAlarm() {
  Serial.println("Alarm stopped.");
  digitalWrite(buzzerPin, LOW);  // Turn off the buzzer
  delay(1000); // Add a delay to avoid multiple button presses
}