#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);

int ledPin = 3;                // choose the pin for the LED
int inputPin = 2;               // choose the input pin (for PIR sensor)
int buzzerPin = 5;
int pirState = LOW;             // we start, assuming no motion detected
int val = 0;                    // variable for reading the pin status

void setup() {
  pinMode(ledPin, OUTPUT);      // declare LED as output
  pinMode(buzzerPin, OUTPUT);   // declare Buzzer as output
  pinMode(inputPin, INPUT);     // declare sensor as input 
  lcd.begin(16, 2);

}

void loop() {
  val = digitalRead(inputPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    lcd.setCursor(0,0);
    lcd.println("Motion detected!");
    digitalWrite(buzzerPin, HIGH); // Buzzer berbunyi
    tone(buzzerPin, 1050);
    delay(100);
    digitalWrite(buzzerPin, LOW); // Buzzer mati
    tone(buzzerPin, 1000);
    digitalWrite(ledPin, HIGH);  // turn LED ON
    delay(100);
    digitalWrite(ledPin, LOW); // LED mati
    delay(100);
    if (pirState == LOW) {
      // we have just turned on
      lcd.setCursor(0,1);
      lcd.println("Motion detected!");
      // We only want to print on the output change, not state
      pirState = HIGH;
    }
  } else {
    tone(buzzerPin, LOW);
    lcd.setCursor(0,0);
    lcd.println("No Motion     ");
    digitalWrite(ledPin, LOW); // turn LED OFF
    delay(1000);
    digitalWrite(ledPin, HIGH); // LED mati
    delay(1000);
    if (pirState == HIGH) {
      // we have just turned off
      lcd.setCursor(0,1);
      lcd.println("Motion ended!  ");
      // We only want to print on the output change, not state
      pirState = LOW;
    }
  }
  delay(10); // Menunggu 150 ms sebelum pengecekan jarak berikutnya
}