// include the library code:
#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

#include <DHT.h>

// set the DHT Pin
#define DHTPIN 8

// initialize the library with the numbers of the interface pins
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

void setup() {
  // put your setup code here, to run once:
  // Init
  lcd.init();
  lcd.backlight();

  dht.begin();

   // Print something
  lcd.setCursor(0, 0);
  lcd.print("Temp:  Humidity:");
 }

void loop() {
  // put your main code here, to run repeatedly:
 delay(500);
  // set the cursor to column 0, line 1
  // (note: line 1 is the second row, since counting begins with 0):
  lcd.setCursor(0, 1);
  // read humidity
  float h = dht.readHumidity();
  //read temperature in Fahrenheit
  float f = dht.readTemperature(true);

  if (isnan(h) || isnan(f)) {
    lcd.print("ERROR");
    return;
  }

  lcd.print(f);
  lcd.setCursor(7,1);
  lcd.print(h);  
}