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#include <RTClib.h>
RTC_DS3231 rtc;
void setup () {
Serial.begin(9600);
delay(2000);
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
while (1);
}
// clear alarm
rtc.clearAlarm(1);
rtc.clearAlarm(2);
/*
* make a datetime object to fire the alarm at 10 seconds after the minute
* it doesn't appear to matter what value is in a spot > mode
* i.e. when mode is DS3231_A1_Second or DS3231_A1_Hour
* DateTime alarmone (0,0,0,0,0,10) is the same as
* DateTime alarmone (2020,3,27,0,0,10);
*/
DateTime alarmone (2020,3,27,0,0,10);
/*set alarm1
* mode can be one of DS3231_A1_PerSecond
* DS3231_A1_Second
* DS3231_A1_Minute
* DS3231_A1_Hour
* DS3231_A1_Date
* DS3231_A1_Day
*/
rtc.setAlarm1(alarmone,DS3231_A1_Second);
/* set alarm 2
* alarm 2 doesn't do seconds
* mode can be one of DS3231_A2_PerMinute
* DS3231_A2_Minute
* DS3231_A2_Hour
* DS3231_A2_Date
* DS3231_A2_Day
*
* to make a datetime object to fire the alarm at 10 minutes after the hour
* use
* DateTime alarmtwo (0,0,0,0,10,0);
*/
DateTime alarmtwo (2020,3,27,0,10,5);
rtc.setAlarm2(alarmtwo,DS3231_A2_PerMinute);
}
void loop () {
DateTime now = rtc.now();
Serial.println(now.timestamp(DateTime::TIMESTAMP_FULL));
//check if alarms fired and print result
if ( rtc.alarmFired(1)) {
Serial.println("Alarm 1 fired");
// We need to clear the alarm
rtc.clearAlarm(1);
}
if ( rtc.alarmFired(2)) {
Serial.println("Alarm 2 fired");
rtc.clearAlarm(2);
}
// We don't need to check that often
delay(1000);
}