#include <Wire.h>
#include <LiquidCrystal_I2C.h>

int Sensor = 2;
int led = 4;
int buzzer = 8;
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  Serial.begin(9600);
  pinMode(led, OUTPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(Sensor, INPUT);
  lcd.begin(16, 2);
  lcd.backlight();
  lcd.clear();
  lcd.print("Waiting...");
}

void loop() {
  int PirValue = digitalRead(Sensor);
  
  Serial.print("Value : ");
  Serial.println(PirValue);
  delay(200);

  if (PirValue == 1) {
    Serial.println("Motion detected");
    lcd.clear();
    digitalWrite(led, HIGH);
    tone(buzzer, 440);
    lcd.setCursor(0, 0);
    lcd.print("Motion detected");
    delay(200);
    noTone(buzzer);
    delay(200);
  } else {
    lcd.clear();
    lcd.setCursor(2, 0);
    digitalWrite(led, LOW);
    digitalWrite(buzzer, LOW);
    lcd.print("No motion :p");
    delay(200);
  } 
}