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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 5 Unlimited Alarm with Relay. This code is to have unlimited alarm so you can control multiple devices at different times. We defined an output pin for each alarm to turn it ON or OFF using each alarm. Each alarm can have title to identify them and it will be printed on the serial monitor.
/*
* Lesson 105-1: Building Clock using DS1307 | Robojax Arduino Step By Step Course
This code: Project 6: LED Seven Segment Clock using DS1307
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
Project 3: DS1307 Alarm with Relay and AC Bulb
Project 4: LED Seven Segment Clock using DS1307
Project 5: Unlimited Alarm with Relay (this code)
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/
*
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Written by Ahmad Shamshiri on Feb 07, 2021
* * 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/>.
DS1307: RTCLib from Adafruit
https://github.com/adafruit/RTClib/
HT16k33 library
// AUTHOR: Rob Tillaart
// VERSION: 0.1.0
// PURPOSE: demo
// URL: http://www.adafruit.com/products/1002
// URL: https://github.com/RobTillaart/HT16K33
*/
#include <Wire.h>
#include "RTClib.h"
RTC_DS1307 rtc;
int my_alarm[][6] ={
//year, month, day, hour, minute, second
{2022, 4, 11, 10, 19, 0},
{2022, 4, 11, 10, 19, 10},
{2022, 4, 11, 10, 19, 20},
{2022, 4, 11, 10, 19, 30},
};
const int alarmCount = sizeof(my_alarm) / sizeof(my_alarm[0]);
char alarmName[alarmCount][10] = {
"Door", "Pet food", "Sleep", "Heater"
};
//pins buzzer or relay is connected to
const int alarmPin[alarmCount] ={10, 11, 12, 13};
const int alarmResetPin =5;
bool debug=true;
bool showPrintAlarm = true;
const int relayType = LOW;//LOW or HIGH level trigger
const bool FORMAT_12=true;//if 12 hours set to true, for 24 hours set to false
int outputON, outputOFF;
char daysOfTheWeek[7][12] = {
"Sunday", "Monday", "Tuesday",
"Wednesday", "Thursday", "Friday", "Saturday"};
char monthName[12][12] = {
"January", "February", "March",
"April", "May", "June",
"July", "August", "September",
"October", "November", "December"
};
int year, month, day, hour, minute, second;
boolean alarmStatus[alarmCount];
void setup () {
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__)));
pinMode( alarmResetPin, INPUT_PULLUP);
//based on relayType set outputON and outputOFF
if(relayType)
{
outputON = HIGH;
outputOFF = LOW;
}else{
outputON = LOW;
outputOFF = HIGH;
}
Serial.println(" Alarms list");
for(int i=0; i< alarmCount; i++)
{
Serial.print("Alarm-");
Serial.print (i+1);
Serial.print (" ");
Serial.print (my_alarm[i][0]);
Serial.print (" ");
Serial.print (monthName[my_alarm[i][1]-1]);
Serial.print ("(");
Serial.print (my_alarm[i][1]);
Serial.print (") ");
Serial.print (my_alarm[i][2]);
Serial.print (" ");
Serial.print (my_alarm[i][3]);
Serial.print (":");
Serial.print (my_alarm[i][4]);
Serial.print (":");
Serial.print (my_alarm[i][5]);
Serial.print (" Pin: ");
Serial.println (alarmPin[i]);
pinMode(alarmPin[i], OUTPUT);
digitalWrite(alarmPin[i], outputOFF);//set output OFF initially
alarmStatus[i]= false;//set initial status of alarm as false
}
}//setup
void loop () {
DateTime now = rtc.now();
year = now.year();
month = now.month();
if(FORMAT_12)
{
hour = now.twelveHour();//12 hours format
}else{
hour = now.hour();//24 hour format
}
day = now.day();
minute = now.minute();
second = now.second();
checkAlarm();
if(debug){
Serial.print(year, DEC);
Serial.print('/');
Serial.print(month, DEC);
Serial.print('/');
Serial.print(day, DEC);
Serial.print(" (");
Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
Serial.print(") ");
if(hour <10)
Serial.print(0);
Serial.print(hour, DEC);
Serial.print(':');
if(minute <10)
Serial.print(0);
Serial.print(minute, DEC);
Serial.print(':');
if(second <10)
Serial.print(0);
Serial.print(second, DEC);
if(FORMAT_12)
{
if(now.isPM())
{
Serial.print("PM");
}else{
Serial.print("AM");
}
}
Serial.println();
delay(500);
}
}//loop
void checkAlarm()
{
for(int i=0; i< alarmCount; i++)
{
if(
year == my_alarm[i][0] &&
month == my_alarm[i][1] &&
day == my_alarm[i][2] &&
hour == my_alarm[i][3] &&
minute == my_alarm[i][4] &&
second == my_alarm[i][5] )
{
alarmAction(i);
alarmStatus[i]=true;//report the status
}
alarmOFF(i);//check to see when alarm should be turned off
}
}//checkAlarm()
void printAlarm (int i)
{
if(showPrintAlarm){
Serial.print("Alarm ");
Serial.print (alarmName[i]);
Serial.print(" on ");
Serial.print (my_alarm[i][0]);
Serial.print (" ");
Serial.print (monthName[my_alarm[i][1]-1]);
Serial.print ("(");
Serial.print (my_alarm[i][1]);
Serial.print (") ");
Serial.print (my_alarm[i][2]);
Serial.print (" at ");
Serial.print (my_alarm[i][3]);
Serial.print (":");
Serial.print (my_alarm[i][4]);
Serial.print (":");
Serial.println (my_alarm[i][5]);
}
}//printAlarm end
/*
* alarmAction
* turn the specific pin i associated to the alarm ON
*/
void alarmAction(int i)
{
printAlarm (i);
digitalWrite(alarmPin[i], outputON);
}//alarmAction end
/*
* alarmOFF
* Turns the specific alarm i off
*/
void alarmOFF (int i)
{
if(digitalRead(alarmResetPin) ==LOW)
{
alarmStatus[i] = false;//change the status of particular alarm
digitalWrite(alarmPin[i], outputOFF); //turn relay OFF
if(debug)
Serial.println("Alarm OFF");
}
}//alarmOFF end
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