Horloge simple avec un Arduino, un module breakout RTC DS1307 et un afficheur LCD.

Horloge_Arduino.ino

/************************************************************
 Horloge Arduino
 
 Horloge simple avec un Arduino, un module breakout 
 RTC DS1307 et un afficheur LCD.
 
 Branchements du breakout RTC DS1307:
 Gnd --> GND
 Vcc --> 5 V
 Sda --> analog pin A4
 Scl --> analog pin A5
  
 Branchements de l'afficheur LCD:
 LCD RS pin --> digital pin 12
 LCD Enable pin  --> digital pin 11
 LCD D4 pin  --> digital pin 5
 LCD D5 pin  --> digital pin 4
 LCD D6 pin  --> digital pin 3
 LCD D7 pin  --> digital pin 2
 LCD R/W pin  --> ground

http://electroniqueamateur.blogspot.ca/2013/06/une-horloge-pour-votre-arduino-real.html
 
 ***************************************************/

#include <LiquidCrystal.h>
#include <Wire.h>
#include <RTClib.h>


RTC_DS1307 RTC;
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  Wire.begin();
  RTC.begin();
  lcd.begin(16, 2);
}

void loop() {
  DateTime now = RTC.now();
  
  // l'heure sur la premiêre ligne du LCD
  lcd.setCursor(0, 0);
  lcd.print(now.hour());
  lcd.print(":");
  if (now.minute() < 10) {
    lcd.print("0");
  }
  lcd.print(now.minute());
  lcd.print(":");
  if (now.second() < 10) {
    lcd.print("0");
  }
  lcd.print(now.second());
  
  
  // la date sur la deuxième ligne du LCD
  lcd.setCursor(0, 1); 
  lcd.print(now.day()); 
  lcd.print(" "); 

  switch (now.month()) {
  case 1:
    lcd.print("janvier");
    break;
  case 2:
    lcd.print("fevrier");
    break;
  case 3:
    lcd.print("mars");
    break;
  case 4:
    lcd.print("avril");
    break;
  case 5:
    lcd.print("mai");
    break;
  case 6:
    lcd.print("juin");
    break;
  case 7:
    lcd.print("juillet");
    break;
  case 8:
    lcd.print("aout");
    break;
  case 9:
    lcd.print("septembre");
    break;
  case 10:
    lcd.print("octobre");
    break;
  case 11:
    lcd.print("novembre");
    break;
  case 12:
    lcd.print("decembre");
    break;
  }
  lcd.print(" "); 
  lcd.print(now.year()); 
  delay(1000);
  lcd.clear();
}