#include "DHT.h"
#define DHTPIN 12
#define DHTTYPE DHT22
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd (0x27, 20, 4);


DHT dht(DHTPIN, DHTTYPE);
const int trigPin = 9;
const int echoPin = 10;
long duration;
int distance;
int ledPin = 15;
int inputPin = 4;
int pirState = LOW;
int val = 0;
int LED = 13;

void setup() {
  pinMode(ledPin, OUTPUT);
  pinMode(inputPin, INPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(LED, OUTPUT);
  Serial.println("DHT TEST WOI");
  dht.begin();
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("WELCOME");
}
void loop() {
  val = digitalRead(inputPin);
  float t = dht.readTemperature();
    lcd.setCursor(0, 0);
  lcd.print("TEMP:");
  lcd.println(t);
  lcd.println("celcius");

  delay(100);

 //baris serial print

  val = digitalRead(inputPin);
  float h = dht.readHumidity();
    lcd.setCursor(0, 1);
  lcd.print("HUMIDITY:");
  lcd.println(h);
  lcd.println("%");

  delay(100);

  //baris serial print

  if (val == LOW){
    digitalWrite(LED, LOW);
    digitalWrite(ledPin, LOW);
    if (pirState == LOW){
      lcd.init();
      lcd.backlight();
      lcd.setCursor(0,2);
      lcd.print("           NO PERSON");
      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, HIGH);
    digitalWrite(LED, HIGH);
    if (pirState == HIGH){
      lcd.init();
      lcd.init();
      lcd.backlight();
      lcd.setCursor(0,3);
      lcd.print("     PERSON DETECTED");
      pirState = LOW;
    }
  }
}