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

// I2C LCD setup
LiquidCrystal_I2C lcd(0x27, 16, 2); // Change address to 0x3F if necessary

// PIR sensor pin
const int pirSensorPin = 4; // Digital pin for PIR sensor

void setup() {
  // Initialize Serial for debugging
  Serial.begin(115200);

  // Initialize LCD
  lcd.init ();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("PIR Sensor Init");

  // Initialize PIR sensor
  pinMode(pirSensorPin, INPUT);

  // Initial display message
  lcd.setCursor(0, 1);
  lcd.print("System Ready");
  delay(2000);
}

void loop() {
  // Read PIR sensor value
  int pirValue = digitalRead(pirSensorPin);

  // Display PIR sensor status on LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("PIR Status:");

  lcd.setCursor(0, 1);
  if (pirValue == HIGH) {
    lcd.print("Motion Detected");
  } else {
    lcd.print("No Motion");
  }

  // Small delay to avoid rapid updates
  delay(1000);
}