Display I2C 2004 + Clock + 2X DHT11

#include <Wire.h>

#include <RTC.h>
static DS1307 RTC;

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,20,4);

#include "DHT.h"
#define dht_int A2
#define dht_ext A1
#define DHTTYPE DHT11
DHT dht1(dht_int, DHTTYPE);
DHT dht2(dht_ext, DHTTYPE);

//---------------------------------------------------------------
  void temp(){

  float h1 = dht1.readHumidity();
  float t1 = dht1.readTemperature();
  float f1 = dht1.readTemperature(true);

  lcd.setCursor(0,1);
  lcd.print("INT:");
  lcd.print(t1);
  lcd.print("C ");
  lcd.print("H:");
  lcd.print(h1);
  lcd.print("%");

  float h2 = dht2.readHumidity();
  float t2 = dht2.readTemperature();
  float f2 = dht2.readTemperature(true);

  lcd.setCursor(0,2);
  lcd.print("EXT:");
  lcd.print(t2);
  lcd.print("C ");
  lcd.print("H:");
  lcd.print(h2);
  lcd.print("%");
  }
//---------------------------------------------------------------

  void lcd_display_time() {
  lcd.setCursor(0,0);
  if (RTC.getDay()<10){
  lcd.print(0);
  }
  lcd.print(RTC.getDay());
  lcd.print("-");
  if (RTC.getMonth()<10){
  lcd.print(0);
  }
  lcd.print(RTC.getMonth());
  lcd.print("-");
  lcd.print(RTC.getYear());

  lcd.print(" ");
  if (RTC.getHours()<10){
  lcd.print(0);
  }
  lcd.print(RTC.getHours());
  lcd.print(":");
  if (RTC.getMinutes()<10){
  lcd.print(0);
  }
  lcd.print(RTC.getMinutes());
  lcd.print(":");
  if (RTC.getSeconds()<10){
  lcd.print(0);
  }
  lcd.print(RTC.getSeconds());
  }
//---------------------------------------------------------------
void setup()
{
  Serial.begin(9600);
  RTC.begin();
  Wire.begin();
  dht1.begin();
  dht2.begin();
  delay(100);
  lcd.init();
  lcd.backlight();
  delay(100);
}
//---------------------------------------------------------------
void loop()
{
//---------------------------------------------------------------
  lcd_display_time();
  temp();
    delay(1000);
}