Integrer Horloge DS1307 à mon sketch

Salut, oui je sais, le code correspondant à l'horloge n'est pas dans le code que j'ai inscrit, c' est pour ca.

Voila mon code actuel :

#define DHTPIN 3  // sonde dht (t/rh)
#define DHTTYPE DHT22 //#define DHTTYPE DHT11 (capteur DHT11)
#include <OneWire.h>   //capteur t
#include <LiquidCrystal.h>  //lcd
#include <DHT.h>            //capteur dht
#include "RTClib.h"
#include <Wire.h>
DHT dht(DHTPIN, DHTTYPE);
RTC_DS1307 RTC; 
float h = 0;
float t = 0;

OneWire  ds(4);  //capteur t
LiquidCrystal lcd(5, 6, 7, 8, 9, 10, 11);
int backLight = 12;    // pin 13 will control the backlight


void setup(void) {
  Serial.begin(9600);   //capteur t
  dht.begin();          //capteur dht
   pinMode(backLight, OUTPUT);
  digitalWrite(backLight, HIGH); // turn backlight on.
  lcd.begin(20,4);  
  Wire.begin();  
  RTC.begin();
  
if (! RTC.isrunning()) {
    Serial.println("RTC is NOT running!");
    // following line sets the RTC to the date & time this sketch was compiled
    //RTC.adjust(DateTime(__DATE__, __TIME__));

}
}
void loop(void) {
  DateTime now = RTC.now();
  byte i;
  byte present = 0;
  byte type_s;
  byte data[12];
  byte addr[8];
  float celsius, fahrenheit;
  
  if ( !ds.search(addr)) {
    Serial.println("No more addresses.");
    Serial.println();
    ds.reset_search();
    delay(250);
    return;
  }
  
  Serial.print("ROM =");
  for( i = 0; i < 8; i++) {
    Serial.write(' ');
    Serial.print(addr[i], HEX);
  }

  if (OneWire::crc8(addr, 7) != addr[7]) {
      Serial.println("CRC is not valid!");
      return;
  }
  Serial.println();
 
  // the first ROM byte indicates which chip
  switch (addr[0]) {
    case 0x10:
      Serial.println("  Chip = DS18S20");  // or old DS1820
      type_s = 1;
      break;
    case 0x28:
      Serial.println("  Chip = DS18B20");
      type_s = 0;
      break;
    case 0x22:
      Serial.println("  Chip = DS1822");
      type_s = 0;
      break;
    default:
      Serial.println("Device is not a DS18x20 family device.");
      return;
  } 
  {Serial.print(now.day(), DEC);
    Serial.print('/');
    Serial.print(now.month(), DEC);
    Serial.print('/');
    Serial.print(now.year(), DEC);
    Serial.print(' ');
    Serial.print(now.hour(), DEC);
    Serial.print(':');
    Serial.print(now.minute(), DEC);
    Serial.print(':');
    Serial.print(now.second(), DEC);
    Serial.println();
  }

  ds.reset();
  ds.select(addr);
  ds.write(0x44,1);         // start conversion, with parasite power on at the end
  
  delay(1000);     // maybe 750ms is enough, maybe not
  // we might do a ds.depower() here, but the reset will take care of it.
  
  present = ds.reset();
  ds.select(addr);    
  ds.write(0xBE);         // Read Scratchpad

  Serial.print("  Data = ");
  Serial.print(present,HEX);
  Serial.print(" ");
  for ( i = 0; i < 9; i++) {           // we need 9 bytes
    data[i] = ds.read();
    Serial.print(data[i], HEX);
    Serial.print(" ");
  }
  Serial.print(" CRC=");
  Serial.print(OneWire::crc8(data, 8), HEX);
  Serial.println();

  // convert the data to actual temperature

  unsigned int raw = (data[1] << 8) | data[0];
  if (type_s) {
    raw = raw << 3; // 9 bit resolution default
    if (data[7] == 0x10) {
      // count remain gives full 12 bit resolution
      raw = (raw & 0xFFF0) + 12 - data[6];
    }
  } else {
    byte cfg = (data[4] & 0x60);
    if (cfg == 0x00) raw = raw << 3;  // 9 bit resolution, 93.75 ms
    else if (cfg == 0x20) raw = raw << 2; // 10 bit res, 187.5 ms
    else if (cfg == 0x40) raw = raw << 1; // 11 bit res, 375 ms
    // default is 12 bit resolution, 750 ms conversion time
  }
  celsius = (float)raw / 16.0;
  fahrenheit = celsius * 1.8 + 32.0;
  Serial.print("  Temperature = ");
  Serial.print(celsius);
  Serial.print(" Celsius, ");
  Serial.print(fahrenheit);
  Serial.println(" Fahrenheit");
  lcd.begin(20,4);              // columns, rows.  use 16,2 for a 16x2 LCD, etc.
  lcd.clear();                  // start with a blank screen
  lcd.setCursor(0,0);           // set cursor to column 0, row 0 (the first row)
  lcd.print(now.day(), DEC);
    lcd.print('/');
    lcd.print(now.month(), DEC);
    lcd.print('/');
    lcd.print(now.year(), DEC);
lcd.print(' ');
    lcd.print(now.hour(), DEC);
    lcd.print(':');
    lcd.print(now.minute(), DEC);
    lcd.print(':');
    lcd.print(now.second(), DEC); 
  lcd.setCursor(0,1);           // set cursor to column 0, row 1
  lcd.print(t = dht.readTemperature());
  lcd.setCursor(6,1);         // set cursor to column 0, row 3
  lcd.print("*C");
  lcd.setCursor(0,2);         // set cursor to column 0, row 2
  lcd.print(h = dht.readHumidity());
  lcd.setCursor(6,2);         // set cursor to column 0, row 3
  lcd.print("%RH");
  lcd.setCursor(0,3);         // set cursor to column 0, row 3
  lcd.print(celsius = (float)raw / 16.0);
  lcd.setCursor(6,3);         // set cursor to column 0, row 3
  lcd.print("*C");
  lcd.setCursor(12,3);         // set cursor to column 0, row 3
  lcd.print("temp ext");
  
  h = dht.readHumidity();
    t = dht.readTemperature();
    if (isnan(t) || isnan(h)){
        Serial.println( "Lecture impossible !");
    }else{
        Serial.print("Humidite :");
        Serial.print(h);
        Serial.print(" %\t");
        Serial.print("Temperature :");
        Serial.print(t);
        Serial.println(" *C");
    }
    delay(1000);
}

Pour l'instant je n'arrive pas à comprendre pourquoi les secondes se rafraichissent toutes les 4 secondes.
Et comment passer au niveaux des chiffres de 1 à 01 par exemple 01/01/2013 et pas 1/1/2013