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// Date and time functions using a DS3231 RTC connected via I2C and Wire lib
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);
#include "RTClib.h"
char msg[20];
RTC_DS3231 rtc;
char daysOfTheWeek[7][12] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };
void setup() {
Serial.begin(9600);
lcd.init();
lcd.backlight();
if (!rtc.begin()) {
Serial.println("Couldn't find RTC");
Serial.flush();
while (1) delay(10);
}
// Cette ligne définit l'horloge temps réel avec une date et une heure explicites.
//Par exemple, pour définir le 21 janvier 2014 à 3 heures du matin, vous appelleriez :
// rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
}
void loop() {
DateTime now = rtc.now();
Serial.print(now.year(), DEC);
Serial.print('/');
Serial.print(now.month(), DEC);
Serial.print('/');
Serial.print(now.day(), DEC);
Serial.print(" (");
Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
Serial.print(") ");
Serial.print(now.hour(), DEC);
Serial.print(':');
Serial.print(now.minute(), DEC);
Serial.print(':');
Serial.print(now.second(), DEC);
Serial.println();
Serial.println();
sprintf(msg, "%02d:%02d:%02d", now.hour(), now.minute(), now.second());
lcd.setCursor(6, 1);
lcd.print(msg);
sprintf(msg, "%02d/%02d/%02d", now.day(), now.month(), now.year());
lcd.setCursor(5, 2);
lcd.print(msg);
delay(1000);
}
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