#include <LiquidCrystal_I2C.h>
#include "DHT.h"

#define DHTPIN 15     
#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27,16,2);

const int gasPin = 33;

void setup() {
  lcd.init();
  dht.begin();
  pinMode(gasPin, INPUT);


  lcd.backlight();
  lcd.setCursor(2,1); //kolom,baris
  lcd.print("hello world");
  lcd.clear();

  lcd.setCursor(0,0);
  lcd.print("Tem= ");
  lcd.setCursor(10,0); //kolom,baris
  lcd.print("Hum= ");
  lcd.setCursor(0,1); //kolom,baris
  lcd.print("Gas= ");
  lcd.setCursor(10,1); //kolom,baris
  lcd.print("ppm");
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  int gasValue = analogRead(gasPin);
  


  lcd.setCursor(5,0); //kolom,baris
  lcd.print(String(temperature, 1));
  lcd.setCursor(14,0); //kolom,baris
  lcd.print(String(humidity, 1));
  lcd.setCursor(5,1); //kolom,baris
  lcd.print(String(gasValue));

  // Check if any reads failed and exit early (to try again).
  if (isnan(temperature) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  delay(1000);


}