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


int ledGreen = 2;
int piezoBuzz = 19;
int irSensor = 18;


void setup() {
    Serial.begin(115200); 
    Serial.println("Serial Working");

    pinMode(ledGreen, OUTPUT);
    pinMode(piezoBuzz, OUTPUT);
    pinMode(irSensor, INPUT);
    

    lcd.init();
 	  lcd.backlight();
 	  lcd.clear();

   	
  	delay(100);
  	lcd.clear();
  	
}

void loop() {

  int sensorStatus = digitalRead(irSensor);
  if (sensorStatus == HIGH) 
      {
        
        digitalWrite(ledGreen, LOW); // LED LOW
        Serial.println("MOTION DETECTED!!!!"); 
        digitalWrite(piezoBuzz, HIGH);
        lcd.setCursor(0,0);
        lcd.print("INTRUDER ALERT!!!"); 
        
        delay(1000);
        lcd.clear();
      }
  else  
      {
        
        
        digitalWrite(ledGreen, HIGH); 
        Serial.println("NO MOTION");
        lcd.setCursor(0,0);
        lcd.print("NO INTRUDER..."); 
       
      }

  
 
}