Lesson 105: Ultimate Arduino Clocks projects using DS1307

Lesson 105: Ultimate Arduino Clocks projects using DS1307

Please select other codes for this lecture from the links below.

Part 13: Clock and Timers

This in this lesson we have 7 projects in one. We learn how use DS1307 Real-Time Clock (RTC) module to build a clock using Arduino.

This is project 2-3 In this project we learn how to use DS1207 as alarm clock where we set specific date and time for our alarm and one output pin of Arduino is turned using Alarm. As shown in the video we first turn ON a buzzer as larm and then wiring diagram shown for connecting AC bulb or any other deive to the realy. Relay is just a machanical switch to turn ON or OFF something.

Projects

• Project 1: Basic DS1307 Clock with Arduino
• Project 2: DS1307 Alarm with Buzzer and Relay(this project)
• Project 3: DS1307 Alarm with Relay and AC Bulb(this project)
• Project 4: LED Seven Segment Clock using DS1307
• Project 5: Unlimited Alarm with Relay
• Project 6: LCD Clock using DS1307
• Project 7: LCD Clock with Alarm

 /*
 * Lesson 105-1: Building Clock using DS1307 | Robojax Arduino Step By Step Course
 This code:  Project 2-3: DS1307 Alarm with Buzzer and Relay
In this lesson we learn how to use DS1307 Real-time clock module to build Arduino clock. In this lesson we learn about 7 projects. 

Project 1: Basic DS1307 Clock with Arduino
Project 2: DS1307 Alarm with Buzzer and Relay (this code)
Project 3: DS1307 Alarm with Relay and AC Bulb (this code)
Project 4: LED Seven Segment Clock using DS1307
Project 5: Unlimited Alarm with Relay
Project 6: LCD Clock using DS1307
Project 7: LCD Clock with Alarm 
 * Watch Video instrution for this code:https://youtu.be/gz9xqvRroDY
 * 
 * This code is part of Arduino Step by Step Course which starts here:  https://youtu.be/-6qSrDUA5a8
 * 
 * for library of this code visit http://robojax.com/
 * 
If you found this tutorial helpful, please support me so I can continue creating 
content like this. Make a donation using PayPal by credit card https://bit.ly/donate-robojax 

 *  * This code is "AS IS" without warranty or liability. Free to be used as long as you keep this note intact.* 
 * This code has been download from Robojax.com
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.


*/

#include <Wire.h>
#include "RTClib.h"

#define alarmPin 2

const int alarm[]={2019,6,14,22,17,0};
const int waitTime =4000;


RTC_DS1307 rtc;


void setup () {
  pinMode(alarmPin,OUTPUT);//set pin 2 as output
 
  while (!Serial); // for Leonardo/Micro/Zero

  Serial.begin(9600);
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }

  if (! rtc.isrunning()) {
    Serial.println("RTC is NOT running!");
    // 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(2019, 3, 3, 20, 0, 0));
  }
  //rtc.adjust(DateTime(2019, 3, 3, 20, 0, 0));
   //rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
}

void loop () {
    DateTime robojax = rtc.now();
    Serial.print("Alarm: ");
    for(int i=0;i<6;i++){
      Serial.print(alarm[i]);
      if(i !=5){
        Serial.print("-");
      }
    }
    Serial.println();
    Serial.print("Time:  ");
    Serial.print(robojax.year(), DEC);
    Serial.print("-");
    Serial.print(robojax.month(), DEC);
    Serial.print("-");
    Serial.print(robojax.day(), DEC);
    Serial.print("-");    
    Serial.print(robojax.hour(), DEC);
    Serial.print("-");
    Serial.print(robojax.minute(), DEC);
    Serial.print("-");
    Serial.print(robojax.second(), DEC);
    Serial.println();
 
   if(checkAlarm(robojax)){
    digitalWrite(alarmPin, HIGH);// 
    Serial.print("Alarm Triggered");
    delay(waitTime);
    //while (1);// wait for ever 
   }else{
    digitalWrite(alarmPin, LOW);//
   }
    Serial.println();
    delay(500);
}

/*
 * 
 * @brief returns true if alarm array matches the current time
 * @param timeNow, is the object for RTC clock
 * @return true if alarm values matches current time
 * Written by Ahmad Shamshiri for Robojax.com 
 * on Friday Jun 14th, 2019 at 20:28 in Ajax, Ontatio, Canada
 * 
 */

boolean checkAlarm(DateTime timeNow){

  if(
   alarm[0] ==timeNow.year()
   &&
   alarm[1] ==timeNow.month()
   &&
   alarm[2] ==timeNow.day()
   &&
   alarm[3] ==timeNow.hour()
   &&
   alarm[4] ==timeNow.minute()
   &&
   alarm[5] ==timeNow.second()
   ){
      return true;
   }else{
      return false;
     
   }
  
}//checkAlarm