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

LiquidCrystal_I2C lcd(0X27, 16, 2);

void setup() {
  Wire.begin(19,18);
  lcd.init();
  lcd.backlight();

  pinMode(4, OUTPUT);
  pinMode(2, INPUT);
  pinMode(16, OUTPUT);
  pinMode(5, INPUT);
  pinMode(17, OUTPUT);
}

void loop() {
  int sensor = digitalRead(2) ;
  int pir = digitalRead(5);

  if(!sensor){
    digitalWrite(4, HIGH);
    lcd.setCursor(4,0);
    lcd.print("TROI TOI ");
  }
  else{
    digitalWrite(4, LOW);
    lcd.setCursor(4,0);
    lcd.print("TROI SANG");
  }

  if(pir == 1 ){
    digitalWrite(17, HIGH);
    digitalWrite(16, HIGH);
    lcd.setCursor(1, 1);
    lcd.print("   CO NGUOI   ");
  }
  else{
    digitalWrite(17, LOW);
    digitalWrite(16, LOW);
    lcd.setCursor(1,1);
    lcd.print("KHONG CO NGUOI");
  }
}