#include <dht.h> //DHT and LCD libraries
#include <LiquidCrystal_I2C.h>
 
#define I2C_ADDR 0x27 
#define BACKLIGHT_PIN 3
#define En_pin 2
#define Rw_pin 1
#define Rs_pin 0
#define D4_pin 4
#define D5_pin 5
#define D6_pin 6
#define D7_pin 7
 
LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin);
 
dht DHT; //Declaring the DHT as a dht type to use it later
 
#define DHT11_PIN 4 //Declaring where the DHT signal pin is wired
 
void setup(){
  lcd.begin (16,2);
  lcd.setBacklightPin(BACKLIGHT_PIN,POSITIVE);
  lcd.setBacklight(HIGH);
  lcd.home ();
}
 
void loop()
{
  lcd.clear();
  lcd.setCursor(0,0);
  int chk = DHT.read11(DHT11_PIN); //Reading data from the module
  lcd.print("Temp: ");
  lcd.print(DHT.temperature); //Showing temperature value (before that you can do some math to get the temperature in Farnheit)
  lcd.print(" C");
  lcd.setCursor(0,1);
  lcd.print("Humidity: ");
  lcd.println(DHT.humidity); //Showing humidity percentage
  lcd.print(" %");
  delay(3000); //Refreshing every 1s
}