/*
  Arduino | project-showcase
  Motion sensor

  EmiR60GALA June 8, 2025 — 3:29PM

  https://wokwi.com/projects/433217542086664193
*/

#include <Servo.h> // Include the Servo library

const int pirPin = 9;    // Digital pin connected to the PIR sensor
const int buzzerPin = 8; // Digital pin connected to the passive buzzer
const int servoPin = 7;  // Digital pin connected to the servo motor

int oldPirState = 0;

Servo myServo; // Create a Servo object

void setup() {
  Serial.begin(9600);
  pinMode(pirPin, INPUT);     // Set PIR sensor pin as input
  pinMode(buzzerPin, OUTPUT); // Set buzzer pin as output
  myServo.attach(servoPin);   // Attach the servo motor to the specified pin
  myServo.write(0);           // Initialize servo to 0 degrees
}

void loop() {
  int pirState = digitalRead(pirPin); // Read the state of the PIR sensor
  if (pirState != oldPirState)  {
    oldPirState = pirState;
    if (pirState == HIGH) { // If motion is detected
      Serial.println("Motion detected!");
      //digitalWrite(buzzerPin, HIGH); // Turn on the buzzer (makes sound if it's a passive buzzer and you're controlling it with HIGH/LOW)
      tone(buzzerPin, 440);
      myServo.write(90);             // Rotate servo to 90 degrees
      Serial.println("Action completed. Waiting for next motion...");
    } else {
      // No motion detected, do nothing or you can add code here for no motion state
      Serial.println("No motion"); // Uncomment this line if you want to see "No motion" continuously
      //digitalWrite(buzzerPin, LOW); // Ensure buzzer is off when no motion
      noTone(buzzerPin);
      myServo.write(0);
    }
  }
}