Other Arduino Codes and Videos by Robojax
/*
*
DS3231: Real-Time Clock. Alarm simple
Alarm Pins have been defined to turn Buzzer ON
Updated by Ahmad Shamshiri on Jun 11, 2019 at 22:15
in Ajax, Ontario -- Robojax.com
You can support me on Patreon http://bit.ly/2ZnITLz
Watch video instruction for this code: https://youtu.be/7hBtXdoaAOY
Read more: www.jarzebski.pl/arduino/komponenty/zegar-czasu-rzeczywistego-rtc-DS3231.html
GIT: https://github.com/jarzebski/Arduino-DS3231
Web: http://www.jarzebski.pl
(c) 2014 by Korneliusz Jarzebski
*/
#include <Wire.h>
#include <DS3231.h>
DS3231 clock;
RTCDateTime dt;
#define alarm1Pin 2
#define alarm2Pin 3
void setup()
{
Serial.begin(9600);
pinMode(alarm1Pin,OUTPUT);//
pinMode(alarm2Pin,OUTPUT);
// Initialize DS3231
Serial.println("Initialize DS3231");;
clock.begin();
// Disarm alarms and clear alarms for this example, because alarms is battery backed.
// Under normal conditions, the settings should be reset after power and restart microcontroller.
clock.armAlarm1(false);
clock.armAlarm2(false);
clock.clearAlarm1();
clock.clearAlarm2();
// Manual (Year, Month, Day, Hour, Minute, Second)
clock.setDateTime(2014, 4, 25, 0, 0, 0);
// Set Alarm - Every second.
// DS3231_EVERY_SECOND is available only on Alarm1.
// setAlarm1(Date or Day, Hour, Minute, Second, Mode, Armed = true)
// clock.setAlarm1(0, 0, 0, 0, DS3231_EVERY_SECOND);
// Set Alarm - Every full minute.
// DS3231_EVERY_MINUTE is available only on Alarm2.
// setAlarm2(Date or Day, Hour, Minute, Second, Mode, Armed = true)
// clock.setAlarm2(0, 0, 0, 0, DS3231_EVERY_MINUTE);
// Set Alarm1 - Every 20s in each minute
// setAlarm1(Date or Day, Hour, Minute, Second, Mode, Armed = true)
clock.setAlarm1(0, 0, 0, 20, DS3231_MATCH_S);
// Set Alarm2 - Every 01m in each hour
// setAlarm2(Date or Day, Hour, Minute, Mode, Armed = true)
clock.setAlarm2(0, 0, 1, DS3231_MATCH_M);
// Set Alarm - Every 01m:25s in each hour
// setAlarm1(Date or Day, Hour, Minute, Second, Mode, Armed = true)
// clock.setAlarm1(0, 0, 1, 25, DS3231_MATCH_M_S);
// Set Alarm - Every 01h:10m:30s in each day
// setAlarm1(Date or Day, Hour, Minute, Second, Mode, Armed = true)
// clock.setAlarm1(0, 1, 10, 30, DS3231_MATCH_H_M_S);
// Set Alarm - 07h:00m:00s in 25th day in month
// setAlarm1(Date or Day, Hour, Minute, Second, Mode, Armed = true)
// clock.setAlarm1(25, 7, 0, 0, DS3231_MATCH_DT_H_M_S);
// Set Alarm - 10h:45m:30s in every Friday (1 - Mon, 7 - Sun)
// setAlarm1(Date or Day, Hour, Minute, Second, Mode, Armed = true)
// clock.setAlarm1(5, 10, 40, 30, DS3231_MATCH_DY_H_M_S);
// Check alarm settings
checkAlarms();
}
void checkAlarms()
{
RTCAlarmTime a1;
RTCAlarmTime a2;
if (clock.isArmed1())
{
a1 = clock.getAlarm1();
Serial.print("Alarm1 is triggered ");
switch (clock.getAlarmType1())
{
case DS3231_EVERY_SECOND:
Serial.println("every second");
break;
case DS3231_MATCH_S:
Serial.print("when seconds match: ");
Serial.println(clock.dateFormat("__ __:__:s", a1));
break;
case DS3231_MATCH_M_S:
Serial.print("when minutes and seconds match: ");
Serial.println(clock.dateFormat("__ __:i:s", a1));
break;
case DS3231_MATCH_H_M_S:
Serial.print("when hours, minutes and seconds match: ");
Serial.println(clock.dateFormat("__ H:i:s", a1));
break;
case DS3231_MATCH_DT_H_M_S:
Serial.print("when date, hours, minutes and seconds match: ");
Serial.println(clock.dateFormat("d H:i:s", a1));
break;
case DS3231_MATCH_DY_H_M_S:
Serial.print("when day of week, hours, minutes and seconds match: ");
Serial.println(clock.dateFormat("l H:i:s", a1));
break;
default:
Serial.println("UNKNOWN RULE");
break;
}
} else
{
Serial.println("Alarm1 is disarmed.");
}
if (clock.isArmed2())
{
a2 = clock.getAlarm2();
Serial.print("Alarm2 is triggered ");
switch (clock.getAlarmType2())
{
case DS3231_EVERY_MINUTE:
Serial.println("every minute");
break;
case DS3231_MATCH_M:
Serial.print("when minutes match: ");
Serial.println(clock.dateFormat("__ __:i:s", a2));
break;
case DS3231_MATCH_H_M:
Serial.print("when hours and minutes match:");
Serial.println(clock.dateFormat("__ H:i:s", a2));
break;
case DS3231_MATCH_DT_H_M:
Serial.print("when date, hours and minutes match: ");
Serial.println(clock.dateFormat("d H:i:s", a2));
break;
case DS3231_MATCH_DY_H_M:
Serial.println("when day of week, hours and minutes match: ");
Serial.print(clock.dateFormat("l H:i:s", a2));
break;
default:
Serial.println("UNKNOWN RULE");
break;
}
} else
{
Serial.println("Alarm2 is disarmed.");
}
}
void loop()
{
dt = clock.getDateTime();
Serial.println(clock.dateFormat("d-m-Y H:i:s - l", dt));
// Call isAlarm1(false) if you want clear alarm1 flag manually by clearAlarm1();
if (clock.isAlarm1())
{
Serial.println("ALARM 1 TRIGGERED!");
digitalWrite(alarm1Pin,HIGH);
delay(3000);
digitalWrite(alarm1Pin,LOW);
}
// Call isAlarm2(false) if you want clear alarm1 flag manually by clearAlarm2();
if (clock.isAlarm2())
{
Serial.println("ALARM 2 TRIGGERED!");
digitalWrite(alarm2Pin,HIGH);
delay(300);
digitalWrite(alarm2Pin,LOW);
delay(300);
digitalWrite(alarm2Pin,HIGH);
delay(300);
digitalWrite(alarm2Pin,LOW);
delay(300);
digitalWrite(alarm2Pin,HIGH);
delay(300);
digitalWrite(alarm2Pin,LOW);
delay(300);
digitalWrite(alarm2Pin,HIGH);
delay(300);
digitalWrite(alarm2Pin,LOW);
}
delay(1000);
}
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