Reloj Digital
Reloj digital con hora y día actual.
Material usado:
x1 Arduino uno
x1 módulo RTC (real time clock)
El módulo RCT se usa para mantener la hora y la fecha actual, aunque se vaya la alimentación.
Por eso lleva una pila CR-2032 (3V).
En el código yo lo he ajustado como a mi me hacia falta.
Borrar no he borrado nada.
Simplemente lo puse todo como si fueran comentarios para ocultarlo. (utilizando "//")
Código:
// Date and time functions using a DS3231 RTC connected via I2C and Wire lib#include <Wire.h>
#include "RTClib.h"
RTC_DS3231 rtc;
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
void setup () {
#ifndef ESP8266
while (!Serial); // for Leonardo/Micro/Zero
#endif
Serial.begin(9600);
delay(3000); // wait for console opening
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
while (1);
}
if (rtc.lostPower()) {
Serial.println("RTC lost power, lets set the time!");
// following line sets the RTC to the date & time this sketch was compiled
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
// This line sets the RTC with an explicit date & time, for example to set
// January 21, 2014 at 3am you would call:
// rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
}
}
void loop () {
DateTime now = rtc.now();
Serial.print(now.day(), DEC);//dia
Serial.print('/');
Serial.print(now.month(), DEC);//mes
Serial.print('/');
Serial.print(now.year(), DEC);//Año
Serial.print(" (");
Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);// dia de la semana
Serial.print(") ");
Serial.print(now.hour(), DEC);//hora
Serial.print(':');
Serial.print(now.minute(), DEC);//minutos
Serial.print(':');
Serial.print(now.second(), DEC);//segundos
Serial.println();
// Serial.print(" since midnight 1/1/1970 = ");
// Serial.print(now.unixtime());
// Serial.print("s = ");
// Serial.print(now.unixtime() / 86400L);
// Serial.println("d");
// calculate a date which is 7 days and 30 seconds into the future
DateTime future (now + TimeSpan(7,12,30,6));
//Serial.print(" now + 7d + 30s: ");
//Serial.print(future.year(), DEC);
//Serial.print('/');
// Serial.print(future.month(), DEC);
// Serial.print('/');
// Serial.print(future.day(), DEC);
// Serial.print(' ');
// Serial.print(future.hour(), DEC);
// Serial.print(':');
// Serial.print(future.minute(), DEC);
// Serial.print(':');
// Serial.print(future.second(), DEC);
Serial.println();
Serial.println();
delay(3000);
}
A través del serial print podemos ver los datos actuales.
Conexiones del módulo RTC:
Vcc-Vcc
Gnd-Gnd
SDA-A4
SCL-A5





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