Simple RTC Alarm

Description

This example demonstrate how to use the RTC library methods in order to do something when an alarm is matched. In particular in this example, the RTC time is set at 16:00:00 and an alarm at 16:00:10. When the time match using the match type MATCH_HHMMSS is reached, the attached interrupt function will print on the serial monitor Alarm Match!.

Hardware Required

－ 86Duino Zero/One/EduCake/PLC

Code

/*
  Simple RTC Alarm for 86Duino

  Demonstrates how to set an RTC alarm for the 86Duino

  This example code is in the public domain

  http://arduino.cc/en/Tutorial/SimpleRTCAlarm

  created by Arturo Guadalupi <a.guadalupi@arduino.cc>
  25 Sept 2015
 
  modified
  21 Oct 2015
*/

#include <RTCZero.h>

/* Create an rtc object */
RTCZero rtc;

/* Change these values to set the current initial time */
const byte seconds = 0;
const byte minutes = 0;
const byte hours = 16;

/* Change these values to set the current initial date */
const byte day = 25;
const byte month = 9;
const byte year = 15;

void setup()
{
  Serial.begin(9600);

  rtc.begin(); // initialize RTC 24H format

  rtc.setTime(hours, minutes, seconds);
  rtc.setDate(day, month, year);

  rtc.setAlarmTime(16, 0, 10);
  rtc.enableAlarm(rtc.MATCH_HHMMSS);
 
  rtc.attachInterrupt(alarmMatch);
}

void loop()
{

}

void alarmMatch()
{
  Serial.println("Alarm Match!");
}

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The text of the 86Duino reference is a modification of the Arduino reference, and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.