#include <LiquidCrystal_I2C.h>

int led = 13;
int pirpin = 12;
int pirState = LOW;
int val = 0;

LiquidCrystal_I2C lcd(0x27, 20, 4);
String lastMessage = "";

void setup() {
  pinMode(led, OUTPUT);
  pinMode(pirpin, INPUT);
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("SALWA" ) ;
  lcd.setCursor(0, 1);
  lcd.print("XII TKJ 1");
  delay(2000);
  lcd.clear();
}

void loop() {
  val = digitalRead(pirpin);

  if (val == LOW) {
    digitalWrite(led, LOW);
    if (lastMessage != "Tidak Ada Gerakan") {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print ("Tidak Ada Gerakan");
      lcd.setCursor(0, 1);
      lcd.print("Status Lampu Off");
      lastMessage = "Tidak Ada Gerakan";
    }
  } else {
    digitalWrite(led, HIGH);
    if (lastMessage != "Ada Gerakan") {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Ada Gerakan");
      lcd.setCursor(0, 1);
      lcd.print("Status Lampu On");
      lastMessage = "Ada Gerakan";
    }
  }

  delay(100);
}