Published June 13, 2017 © GPL3+
Alarm Clock and Timer Working Standalone

This alarm clock and timer work without the help of a computer. All the settings can be done on the clock itself and stored in the EEPROM.
IntermediateShowcase (no instructions)37,052
Alarm Clock and Timer Working Standalone
Things used in this project

Hardware components

Arduino UNO
Real Time Clock (RTC)
Adafruit RGB Backlight LCD - 16x2
SparkFun Pushbutton switch 12mm
Story

Overview

alarm clock working standalone
Arduino alarm clock
This sketch is made by Ronald Siemons.
It’s a standalone working alarm clock and timer that can switch on a device for a certain time. The program is menu-driven and very easy to work with. No computer needed when it is ready. It is a completely functional standalone device so to say.
The clock can be set manually on the device itself. The alarm can be set on the device itself to be stored in the EEPROM. The timer works by manually setting it or automatically via the program.
The clock timer is made for a shop to turn on and off the neon lights at the front of the shop.
How it works

When pressing the function button, several menus will be shown and entered when the function button is released. So push the function button and keep it pushed in until the right menu is shown. Let the button go and see what the display shows. Work through the chosen menu with the next button and make the necessary settings with the help of the up and down button. Going back to the function button will put the setting into the EEPROM of the Arduino. See the video and it all will be clear.
Code

clock alarm timer
/*
   Clock and timer developed by Ronald Siemons
   The sketch is free software and for anybody free to use on his or her own risk, if there would be.

   TO KNOW!!!!!!!!!!
   Make a choice out of the menu what show up on the display when pushing the select button. Every
   two secconds an other choice to make will be shown as long as the select button is pushed. By letting it go
   the last shown choice will be made.

   What it does:
   The clock and timer switches on and off a relais.
   The clock is made for stand alone usesage. So one can set the time and the alarm on the device itself
   without the need of an USB connection to a computer.
   The general idee:
   The clock is mate as part of a system to switch on and off the lights in a shop. This part is made
   for the neon lights at the front of the shop. The lights only work in the evening and go off every day at the same time.
   So the alarm is set on the off switch of the lights and as the time off lighting up the lights is known the timer works
   backwords from the known of switching time back during a certain period to the starting moment of the lights.
   The period of lighting depends on the pereod of the year and can be set by hand or automatic.
   As it has to work all year round without setting and resetting the system every now and again
   daylight saving settings ar built in also. Readjustment of the daylight savings has to be done
   for the specific country it is going to be used.
*/
#include <Pushbutton.h> // part of arduino library. Search in manage libraries.
#include <EEPROM.h>
#include <RTClib.h>
#include <LCD.h>
#include <LiquidCrystal.h>
#include <LiquidCrystal_I2C.h>
#include <Wire.h>

LiquidCrystal_I2C lcd(0x3F, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address
RTC_DS1307 RTC;

const int DS1307 = 0x68; // Address of DS1307 see data sheets //??????????
const int lightAlarm_pin = 6;
const int selectButton_pin = 5;
const int nextButton_pin = 4;
const int upButton_pin = 3;
const int downButton_pin = 2;
const int alarmButton_pin = A1; // gets an other function later
const boolean alarmSystem_pin = 7;
const boolean timerLightOnLED_pin = 8;

Pushbutton selectButton(selectButton_pin);  //equal to pinMode(selectButton_Pin,INPUT_PULLUP);
Pushbutton nextButton(nextButton_pin);
Pushbutton upButton(upButton_pin);
Pushbutton downButton(downButton_pin);
Pushbutton alarmButton(alarmButton_pin);

enum mainSelection {
  ALARM_ON_OFF = 1,   //switching alarm on or off            = 1
  ALARM_SEASON,       //change the time of starting          = 2
  ALARM_SET,          //to set the alarm start and stop time = 3
  CLOCK_SET,          //to set time and date                 = 4
  AlARM_AUTO,         //Light timer automatic or manual      = 5
  RUN_CLOCK           //Reading and displaying time and date = 6
};
enum mainSelection key = RUN_CLOCK;

int alarmMinuteStart = 1;   //Time timer starts according to the settings of alarmPlus and alarmxxxStop
int alarmHourStart = 1;     //Time timer starts according to the settings of alarmPlus and alarmxxxStop
int alarmMinuteStop = 2;    //Time the timer has been set to stop
int alarmHourStop = 2;      //Time teh timer has been set to stop Minimum 6
int alarmPlus = 0;          //Working hours of the lights Maximum 6
boolean alarmOnOff = false; //Turns the alarm On/Off //off is false and on is true
boolean autoManual = false;  //Timer automatic or manual
int alarmOffSet = 6;
int yr = 2000;
int mo = 1;
int dy = 1;
int hr = 0;
int mn = 0;
int setYr = 00;
int setMo = 1;
int setDy = 1;
int setHr = 0;
int setMn = 0;
boolean daylightSaving = true;
boolean aBlink = true;
const int loopCheckMax = 80; //duration of the loops in the settings
int loopCheck = 0;  //to controll if if there is any interaction
unsigned long  clockDisplayCheck = millis(); //counter in the loop
int lcdDisplayCheck = 0; //counter for controling the time the lcd will be on
boolean timerLight = false; //set the relais for the alarm lights
int timerLightStage = 0;


//((((((((((((((((((((((((((((SETUP))))))))))))))))))))))))))))))))
void setup() {
  pinMode(lightAlarm_pin, OUTPUT);
  pinMode(alarmSystem_pin, OUTPUT);
  pinMode(timerLightOnLED_pin, OUTPUT);
  lcd.begin(16, 2);
  Wire.begin();
  RTC.begin();
  Serial.begin(9600);
  clockRunning();

  lcd.clear();
  lcd.on();
  displayLcdFirstLine( 2);
  readTimeNow();
  displayTimeNow(2);
  readAlarm();
}
//((((((((((((((((((((((((((((----))))))))))))))))))))))))))))))))
//***************************^LOOP^*******************************
void loop() {
  key = RUN_CLOCK;
  lightManualyOnOff(); //to switch the relay manualy when the alarm has been turned off
  lcdLight(); //turns on the lcd on demand
  if ((millis() - clockDisplayCheck) > 500) //Reading and displaying date and time continuesly every 0.5 second
  {
    clockRunning();
    clockDisplayCheck = millis(); //sets the timer variable
    readTimeNow(); //reading time out of the Real Time Clock
    displayTimeNow(2);  //displaying the time now and the digit to blink
    readAlarm(); //reading the alarm settings out off the Eeprom
    displayLcdFirstLine( 0);  //Basic display line
    alarmActivate(); //setting the alarm
    timerLightOnOff();
  }

  if (selectButton.getSingleDebouncedPress())
  {
    lcdDisplayCheck = 0; // lcd back to maximum time
    lcdLight(); //turns lcd on
    mainKeySelection(); // reads keySelection   ALARM_ON_OFF,ALARM_SEASON,ALARM_SET,CLOCK_SET,RUN_CLOCK,
    //  lcd.setCursor(0, 0);

    switch (key) {
      case ALARM_ON_OFF:
        setTimerOnOff();
        break;

      case ALARM_SEASON:
        setTimerPlus();
        break;

      case ALARM_SET:
        setHr = alarmHourStop;
        setMn = alarmMinuteStop;
        lcd.setCursor(0, 0);
        lcd.print("Set alarm time  ");
        presetClockTime(alarmOffSet); //Gives an off-set to the alarm stopping time of 6? hours
        if (setHr == 12) { //to prevent the timer passing mid-night
          setHr = 11;
          setMn = 59;
        }
        saveAlarmSet();
        //   readAlarm();
        break;

      case CLOCK_SET:
        presetClockDate();
        readTimeNow();  //reading the current time to display in presetClockTime
        setHr = hr;
        setMn = mn;
        lcd.setCursor(0, 0);
        lcd.print("Set clock time  ");
        presetClockTime(0); //Time can be set starting at zero. The function is also in use to set the alarm stopping time
        saveClock();
        break;

      case AlARM_AUTO:
        alarmAutoManual();
        break;
    }
  }
}
//***************************~~*******************************

//function clock running// A check about the clock being running
void clockRunning() {
  if (!RTC.begin() || !RTC.isrunning()) {
    while (!selectButton.getSingleDebouncedPress ()) {
      if (digitalRead(alarmSystem_pin) == LOW) digitalWrite(alarmSystem_pin, HIGH);
      else digitalWrite(alarmSystem_pin, LOW);
      delay(100);
    }
  }
}

//function lcdTimerLights // timer for the lcd lcdDisplayCheck incrises with every half a second
void lcdLight() {
  if (alarmButton.getSingleDebouncedPress()) lcdDisplayCheck = 0;
  lcdDisplayCheck++;
  if (lcdDisplayCheck < 900) { //times half a second the display will be on
    lcd.display();
    lcd.backlight();
  }
  else {
    lcd.noDisplay();
    lcd.noBacklight();
    if (lcdDisplayCheck > 2000) lcdDisplayCheck = 900; //resetting the variable to prevent the figure gets out of his boundary while the light stays off
  }
}

///function timerLightOnOff // works in automatic and manual to set the pin for the relais
void timerLightOnOff() {
  if (timerLight) {
    digitalWrite(lightAlarm_pin, LOW);  // the relay activates to zero
    digitalWrite(timerLightOnLED_pin, HIGH);
  } else  {
    digitalWrite(lightAlarm_pin, HIGH);
    digitalWrite(timerLightOnLED_pin, LOW);
  }

}

///function lightManualyOnOff // to set the timer relais by hand
void lightManualyOnOff() {
  if (!alarmOnOff) {
    if (nextButton.getSingleDebouncedPress()) {
      Serial.print (timerLight);
      timerLight = !timerLight;
    }
  }
}
////function readTimeNow////reading date and time
void readTimeNow() {
  DateTime now = RTC.now();
  yr = now.year();
  mo = now.month();
  dy = now.day();
  hr = now.hour();
  mn = now.minute();
}

///function readAlarm////to read the alarm settings from the Eeprom
void readAlarm() {
  alarmHourStop = EEPROM.read(0);
  delay(15);
  alarmMinuteStop = EEPROM.read(1);
  delay(15);
  alarmPlus = EEPROM.read(2);
  delay(15);
  alarmOnOff = EEPROM.read(3);
  delay(50);
  autoManual = EEPROM.read(4);
  delay(50);
  if (alarmHourStop <= alarmOffSet) alarmHourStop = alarmOffSet + 1; //to prevent the alarm storting before the day has begun
  alarmHourStart = alarmHourStop - alarmPlus;
  alarmMinuteStart = alarmMinuteStop;//calculating the timer stopping time
  if (alarmAutoManual) automaticTimer();  //Sets the timer automaticaly in the preset time scedule
  dayLightSaving();
}

void alarmActivate() {
  if (alarmOnOff) {  //Checking if the alarm has to be activated

    if ((hr - alarmHourStart) == 0)
    {
      if (mn >= alarmMinuteStart)
        timerLight = true;
      else timerLight = false;
    }
    else if (hr - alarmHourStop == 0)
    {
      if ( mn <= alarmMinuteStop)
        timerLight = true;
      else timerLight = false;
    }
    else if ((alarmHourStop - hr < alarmPlus) && (alarmHourStop - hr >= 1)) timerLight = true;
    else timerLight = false;

  }
  // else timerLight = false; // has to e removed ???????????????????????????????????
}

////function display time now////display time
void displayTimeNow(int digitBlink) {
  char  textDT[16];
  sprintf(textDT, "%02d:%02d %02d/%02d/%04d", hr, mn, dy, mo, yr); //puts int variabels in the rigth format into textDT
  lcd.setCursor(0, 1);
  lcd.print(textDT); //prints in four and two digits
  lcd.setCursor(digitBlink, 1);
  if (aBlink) lcd.print(" "); else lcd.print(":");
  aBlink = !aBlink;
}


////function displayLcdFirstLine////displays the first line
void displayLcdFirstLine( int blinking) { //blinking 0 is back to RUN position

  if (blinking > 0) {
    for (int i = 1; i <= blinking; i++) {
      lcd.setCursor(0, 0);
      lcd.print("                ");
      lcd.setCursor(0, 0);
      delay(400);
      lcd.print("TIMER-1.00      ");  //Titel
      lcd.setCursor(11, 0);
      if (alarmOnOff == false) lcd.print("off~ "); else lcd.print(" on~ ");
      lcd.setCursor(15, 0);
      if (autoManual) lcd.print("A"); else lcd.print(alarmPlus);

      delay(400);
    }
  } else {
    lcd.setCursor(0, 0);
    lcd.print("TIMER-1.00"); //Titel
    lcd.setCursor(10, 0);
    if (alarmOnOff == false) lcd.print(" off~ "); else lcd.print("  on~ ");
    lcd.setCursor(15, 0);
    if (autoManual) lcd.print("A"); else lcd.print(alarmPlus);
    delay(400);
  }
}



////function mainKeySelection////make a selection to set timer on/off, alarm season, alarm set, clock set
void mainKeySelection() {
  unsigned long started = millis();
  delay(10);
  unsigned long moment;
  const int laps = 2000;
  int state = 0;
  int lapTime = 0;

  while (selectButton.isPressed()) {
    moment = millis();
    delay(100);
    lapTime = moment - started;
    if (((lapTime) >= (0 * laps)) && ((lapTime) <= (1 * laps))) state = 1;
    else if (((lapTime) >= (1 * laps)) && ((lapTime) <= (2 * laps))) state = 2;
    else if (((lapTime) >= (2 * laps)) && ((lapTime) <= (3 * laps))) state = 3;
    else if (((lapTime) >= (3 * laps)) && ((lapTime) <= (4 * laps))) state = 4;
    else if (((lapTime) >= (4 * laps)) && ((lapTime) <= (5 * laps))) state = 5;
    else if (((lapTime) >= (5 * laps)) && ((lapTime) <= (6 * laps))) state = 6;
    delay(500);
    switch (state) {
      case 1:
        lcd.setCursor(0, 1);
        lcd.print("set alarm on/off");
        break;
      case 2:
        lcd.setCursor(0, 1);
        lcd.print("Timer hours set ");
        break;
      case 3:
        lcd.setCursor(0, 1);
        lcd.print("Alarm time set! ");
        break;
      case 4:
        lcd.setCursor(0, 1);
        lcd.print("Clock time set! ");
        break;
      case 5:
        lcd.setCursor(0, 1);
        lcd.print("Alarm   man/auto");
        break;
      case 6:
        lcd.setCursor(0, 1);
        lcd.print("Back to the menu");
        break;
    }
    if ((lapTime) > (6 * laps)) { //back into the same routine
      started = moment;
    }
  }
  key = state;// keySelection   ALARM_ON_OFF,ALARM_SEASON,ALARM_SET,CLOCK_SET,AlARM_AUTO,RUN_CLOCK,
}

////function setTimerOnOff////switching On Off status as a flip flop
void setTimerOnOff() {
  boolean setAlarmOnOff = alarmOnOff;
  lcd.setCursor(0, 0);
  lcd.print("switch it now   ");
  lcd.setCursor(0, 1);
  lcd.print("Timer is:  ");
  lcd.setCursor(11, 1);
  if (alarmOnOff == false) lcd.print("[off] "); else lcd.print("[on]  ");
  while (!selectButton.getSingleDebouncedPress ()) {
    if (upButton.getSingleDebouncedPress() || downButton.getSingleDebouncedPress())setAlarmOnOff = !setAlarmOnOff;
    lcd.setCursor(11, 1);
    if (setAlarmOnOff == false) lcd.print("[off] "); else lcd.print("[on]  ");
    delay(30);
  }
  if (alarmOnOff != setAlarmOnOff) {
    EEPROM.write(3, setAlarmOnOff);
    delay(15);
  }
}

////function setTimerPlus////expedites the moment of starting the alarm //deze functie functioneert nog niet
void setTimerPlus() {
  readAlarm();
  int setAlarmPlus = alarmPlus; // tijdelijke variable om opslaan eeprom te laten werken!!!!!!!!!!!!!!!!!!
  lcd.setCursor(0, 0);
  lcd.print("stop time: 00:00");
  if (alarmHourStop < 10) lcd.setCursor(12, 0); else lcd.setCursor(11, 0);
  lcd.print(alarmHourStop);
  if (alarmMinuteStop < 10) lcd.setCursor(15, 0); else lcd.setCursor(14, 0);
  lcd.print(alarmMinuteStop);
  lcd.setCursor(0, 1);
  lcd.print("hours  on:      ");
  lcd.setCursor(11, 1);
  lcd.print(setAlarmPlus);

  while (!selectButton.getSingleDebouncedPress ()) {
    lcd.setCursor(11, 1);
    if (alarmHourStop > 6) {  // the stopping hour has to be set later then 6 am
      if (upButton.isPressed() && (setAlarmPlus < 6)) setAlarmPlus++; //The maximum time for the lights to be on is six hours
      if (downButton.isPressed() && (setAlarmPlus > 1)) setAlarmPlus--; // The minimum time for the hours to be on is one hour
      lcd.print(setAlarmPlus);
    }
    else {
      lcd.setCursor(0, 0);
      lcd.print("Set alarm stop  "); // in case the alarm is set too early in the day. Minimum after 6 am
      lcd.setCursor(0, 1);
      lcd.print("timer first !!!!");
    }
    delay(250);
  }
  if (alarmPlus != setAlarmPlus) {
    EEPROM.write(2, setAlarmPlus);
    delay(15);
  }
}

////function presetClockDate////setting year, month, day, according to the input
void presetClockDate() {
  int  loops = 20;
  boolean pBlink = false;
  const int loopMax = 25;  //Moment of refreshing the LCD
  int loopCheck = 0;  //to controll if if there is any interaction
  enum YMD {YEAR = 1, MONTH, DAY};

  enum YMD YrMoDy = YEAR;
  setYr = (yr - 2000); setMo = mo; setDy = dy; setHr = hr; setMn = mn;
  lcd.setCursor(0, 0);
  lcd.print("Set Year // Date");

  while (loopCheck < loopCheckMax) {  //fast running part of the loop
    delay(10);
    loops++;
    if (YrMoDy == YEAR) {
      setYear();
      loopCheck = 0;
    }
    if (YrMoDy == MONTH) {
      setMonth();
      loopCheck = 0;
    }
    if (YrMoDy == DAY) {
      setDay();
      loopCheck = 0;
    }
    if (YrMoDy > DAY)  loopCheck = loopCheckMax;
    if (nextButton.getSingleDebouncedPress()) YrMoDy = YrMoDy + 1;
    if (loops > loopMax) {  // displaying whit a long interval
      lcd.setCursor(0, 1);
      lcd.print("Y-00 Mo-00 Dy-00");
      if (setYr < 10) {
        lcd.setCursor(2, 1);
        lcd.print("00");
        lcd.setCursor(3, 1);
      } else lcd.setCursor(2, 1);
      lcd.print(setYr);
      if (setMo < 10) {
        lcd.setCursor(8, 1);
        lcd.print("00");
        lcd.setCursor(9, 1);
      }
      else lcd.setCursor(8, 1);
      lcd.print(setMo);
      if (setDy < 10) {
        lcd.setCursor(14, 1);
        lcd.print("00");
        lcd.setCursor(15, 1);
      }
      else lcd.setCursor(14, 1);
      lcd.print(setDy);


      if (YrMoDy == YEAR)lcd.setCursor(2, 1);
      if (YrMoDy == MONTH)lcd.setCursor(8, 1);
      if (YrMoDy == DAY)lcd.setCursor(14, 1);
      if (pBlink)lcd.print("  ");

      pBlink = !pBlink;
      loops = 0;
      loopCheck++;
    }
    if (selectButton.getSingleDebouncedPress ()) { //breaks the loop by the select button or by time lapsed
      loopCheck = loopCheckMax;
    }
    delay(10);
  }
  lcd.setCursor(0, 0);
  lcd.print("                ");
  lcd.setCursor(0, 1);
  lcd.print("                ");
}

////function presetClockTime////setting hour and minute according to the input
void presetClockTime(int StartingPointHour) {
  int  loops = 20;
  boolean pBlink = false;
  const int loopMax = 25;  //Moment of refreshing the LCD
  int loopCheck = 0;  //to controll if if there is any interaction
  //  setHr = hr; setMn = mn;
  enum HM {HOUR = 1, MINUTE};
  enum HM HrMn = HOUR;

  while (loopCheck < loopCheckMax) {  //fast running part of the loop
    delay(10);
    loops++;
    if (HrMn == HOUR) {  //Setting hour function
      setHr = hourReturn(setHr, StartingPointHour);
      delay(10);
      loopCheck = 0;
    }
    if (HrMn == MINUTE) { //Setting minute function
      setMn = minuteReturn(setMn);
      delay(10);
      loopCheck = 0;
    }
    if (HrMn > MINUTE)loopCheck = loopCheckMax;
    if (nextButton.getSingleDebouncedPress()) HrMn = HrMn + 1;
    if (loops > loopMax) {  // displaying whit a long interval
      lcd.setCursor(0, 1);
      lcd.print("hour:00  minu:00");
      if (setHr < 10) {
        lcd.setCursor(5, 1);
        lcd.print("00");
        lcd.setCursor(6, 1);
      } else lcd.setCursor(5, 1);
      lcd.print(setHr);
      if (setMn < 10) {
        lcd.setCursor(14, 1);
        lcd.print("00");
        lcd.setCursor(15, 1);
      }
      else lcd.setCursor(14, 1);
      lcd.print(setMn);
      if (HrMn == HOUR)lcd.setCursor(5, 1);
      if (HrMn == MINUTE)lcd.setCursor(14, 1);
      if (pBlink)lcd.print("  ");

      pBlink = !pBlink;
      loops = 0;
      loopCheck++;
    }
    if (selectButton.getSingleDebouncedPress ()) { //breaks the loop by the select button or by time lapsed
      loopCheck = loopCheckMax;
    }
    delay(10);
  }
  lcd.setCursor(0, 0);
  lcd.print("                ");
  lcd.setCursor(0, 1);
  lcd.print("                ");
}

////function lastDayOfTheMonth////days per month Leap Year included
int lastDayOfTheMonth(int setMonth) {
  switch (setMonth) {
    case 1: //January
      return 31;
      break;
    case 2: //February
      if ((setYr % 4) == 0) return 29; else return 28;
      break;
    case 3: //March
      return 31;
      break;
    case 4: //April
      return 30;
      break;
    case 5: //May
      return 31;
      break;
    case 6: //June
      return 30;
      break;
    case 7: //Juli
      return 31;
      break;
    case 8: //August
      return 31;
      break;
    case 9: //September
      return 30;
      break;
    case 10: //October
      return 31;
      break;
    case 11: //November
      return 30;
      break;
    case 12: //December
      return 31;
      break;
  }
}

////function setYear//
void setYear() {
  int teller = 0;
  if (setYr < 18) setYr = 17; //to set the minimum year
  while (upButton.isPressed()) {
    if (setYr < 99) setYr++;
    lcd.setCursor(2, 1);
    lcd.print(setYr);
    teller++;
    if (teller > 7) delay(100); else delay(250);
  }
  while (downButton.isPressed()) {
    if (setYr > 17) setYr--;
    lcd.setCursor(2, 1);
    lcd.print(setYr);
    teller++;
    if (teller > 7) delay(100); else delay(250);
  }
}

////function //setMonth
void setMonth() {
  while (upButton.isPressed()) {
    if (setMo < 12) setMo++;
    lcd.setCursor(8, 1);
    if (setMo < 10) {
      lcd.setCursor(8, 1);
      lcd.print("00");
      lcd.setCursor(9, 1);
    }
    lcd.print(setMo);
    delay(250);
  }
  while (downButton.isPressed()) {
    if (setMo > 1) setMo--;
    lcd.setCursor(8, 1);
    if (setMo < 10) {
      lcd.setCursor(8, 1);
      lcd.print("00");
      lcd.setCursor(9, 1);
    }
    lcd.print(setMo);
    delay(250);
  }
}

////function //setDay
void setDay() {
  int teller = 0;
  int maxD = maxDay();
  while (upButton.isPressed()) {
    if (setDy < maxD) setDy++;
    lcd.setCursor(14, 1);
    if (setDy < 10) {
      lcd.setCursor(14, 1);
      lcd.print("00");
      lcd.setCursor(15, 1);
    }
    lcd.print(setDy);
    teller++;
    if (teller > 7) delay(100); else delay(250);
  }

  while (downButton.isPressed()) {
    if (setDy > 1) setDy--;
    lcd.setCursor(14, 1);
    if (setDy < 10) {
      lcd.setCursor(14, 1);
      lcd.print("00");
      lcd.setCursor(15, 1);
    }
    lcd.print(setDy);
    teller++;
    if (teller > 7) delay(100); else delay(250);
  }
}

////function //last day of the month
int maxDay() {
  switch (setMo) {
    case 1:
      return 31;
    case 2:
      if ((setYr % 4) == 0)return 29; else return 28;
    case 3:
      return 31;
    case 4:
      return 30;
    case 5:
      return 31;
    case 6:
      return 30;
    case 7:
      return 31;
    case 8:
      return 31;
    case 9:
      return 30;
    case 10:
      return 31;
    case 11:
      return 30;
    case 12:
      return 31;
  }
}

////function hourReturn
int hourReturn(int setHour, int startingPoint) {
  if (setHour < startingPoint) setHour = startingPoint; // to set the minimum hour according to set clock or set alarm
  while (upButton.isPressed()) {
    if (setHour < 24) setHour++;
    lcd.setCursor(5, 1);
    if (setHour < 10) {
      lcd.setCursor(5, 1);
      lcd.print("00");
      lcd.setCursor(6, 1);
    }
    lcd.print(setHour);
    delay(200);
  }
  while (downButton.isPressed()) {
    if (setHour > startingPoint) setHour--;
    lcd.setCursor(5, 1);
    if (setHour < 10) {
      lcd.setCursor(5, 1);
      lcd.print("00");
      lcd.setCursor(6, 1);
    }
    lcd.print(setHour);
    delay(200);
  }
  return setHour;
}

////function minute Return
int minuteReturn(int setMinute) {
  while (upButton.isPressed()) {
    if (setMinute < 60) setMinute++;
    lcd.setCursor(14, 1);
    if (setMinute < 10) {
      lcd.setCursor(14, 1);
      lcd.print("00");
      lcd.setCursor(15, 1);
    }
    lcd.print(setMinute);
    delay(200);
  }
  while (downButton.isPressed()) {
    if (setMinute > 1) setMinute--;
    lcd.setCursor(14, 1);
    if (setMinute < 10) {
      lcd.setCursor(14, 1);
      lcd.print("00");
      lcd.setCursor(15, 1);
    }
    lcd.print(setMinute);
    delay(200);
  }
  return setMinute;
}

////function save clock // saves the clock settings into the 1307 clock module
void saveClock() {
  boolean saveNew = true;
  lcd.setCursor(0, 1);
  lcd.print("00:00 00/00/2000");  //setHr is still two digets
  if (setHr < 10) lcd.setCursor(1, 1); else lcd.setCursor(0, 1);
  lcd.print(setHr);
  if (setMn < 10) lcd.setCursor(4, 1); else lcd.setCursor(3, 1);
  lcd.print(setMn);
  if (setDy < 10) lcd.setCursor(7, 1); else lcd.setCursor(6, 1);
  lcd.print(setDy);
  if (setMo < 10) lcd.setCursor(10, 1); else lcd.setCursor(9, 1);
  lcd.print(setMo);
  lcd.setCursor(14, 1);
  lcd.print(setYr);
  lcd.setCursor(0, 0);
  lcd.print("save clock?: yes");
  while (!selectButton.getSingleDebouncedPress ()) {
    lcd.setCursor(13, 0);
    if (saveNew == false) lcd.print("no "); else lcd.print("yes");
    if ((upButton.getSingleDebouncedPress() == 1) || (downButton.getSingleDebouncedPress() == 1))saveNew = !saveNew;;
    delay(80);
  }
  if (saveNew = true) {
    int setSec = 0;
    int setWkDy = 1;
    delay(100);
    // The following codes transmits the data to the RTC
    Wire.beginTransmission(DS1307);
    Wire.write(byte(0));
    Wire.write(decToBcd(setSec));
    Wire.write(decToBcd(setMn));
    Wire.write(decToBcd(setHr));
    Wire.write(decToBcd(setWkDy)); //not in use
    Wire.write(decToBcd(setDy));
    Wire.write(decToBcd(setMo));
    Wire.write(decToBcd(setYr));  //has to be two digits
    Wire.write(byte(0));
    Wire.endTransmission();
    // Ends transmission of data
  }
  delay(100);
}

////function decToBcd // in use for saving the clock settings
byte decToBcd(byte val) {
  return ((val / 10 * 16) + (val % 10));
}

////function save alarm // saves the alarm settings into Eeprom
void saveAlarmSet() {
  boolean saveNew = true;
  lcd.setCursor(0, 1);
  lcd.print("hour:00  minu:00");
  if (setHr < 10) {
    lcd.setCursor(5, 1);
    lcd.print("00");
    lcd.setCursor(6, 1);
  } else lcd.setCursor(5, 1);
  lcd.print(setHr);
  if (setMn < 10) {
    lcd.setCursor(14, 1);
    lcd.print("00");
    lcd.setCursor(15, 1);
  }
  else lcd.setCursor(14, 1);
  lcd.print(setMn);
  lcd.setCursor(0, 0);
  lcd.print("save Alarm?: yes");
  while (!selectButton.getSingleDebouncedPress ()) {
    lcd.setCursor(13, 0);
    if (saveNew == false) lcd.print("no "); else lcd.print("yes");
    if ((upButton.getSingleDebouncedPress() == 1) || (downButton.getSingleDebouncedPress() == 1))saveNew = !saveNew;; // dit nog styleren!!!!!!!!!!!!!!!!!!!!!!!!!!!
    delay(80);
  }
  if (saveNew = true) {
    EEPROM.write(0, setHr);
    delay(15);
    EEPROM.write(1, setMn);
    delay(15);
  }
  delay(100);
}

////function AlarmAutoManual// setting the alarm on automatic or manual
void alarmAutoManual() {
  boolean autoManualNew = autoManual; //using this variable makes the display less restless
  lcd.setCursor(0, 1);
  lcd.print("Lights off 00:00");
  if (alarmHourStop < 10) {
    lcd.setCursor(11, 1);
    lcd.print("00");
    lcd.setCursor(12, 1);
  } else lcd.setCursor(11, 1);
  lcd.print(alarmHourStop);
  if (alarmMinuteStop < 10) {
    lcd.setCursor(14, 1);
    lcd.print("00");
    lcd.setCursor(15, 1);
  }
  else lcd.setCursor(14, 1);
  lcd.print(alarmMinuteStop);
  lcd.setCursor(0, 0);
  if (autoManualNew)lcd.print("Timer: automatic"); else lcd.print("Timer: manual   ");

  while (!selectButton.getSingleDebouncedPress ()) {
    if (upButton.getSingleDebouncedPress() || downButton.getSingleDebouncedPress()) {
      autoManualNew = !autoManualNew;
      lcd.setCursor(0, 0);
      if (autoManualNew)lcd.print("Timer: automatic"); else lcd.print("Timer: manual   ");
    }
    delay(80);
  }

  if (autoManualNew != autoManual) {
    EEPROM.write(4, autoManualNew);
    delay(20);
  }
}

//function automatic Timer // walks automaticaly trough the timer settings during the year
void automaticTimer() {
  switch (mo) {
    case 1:
      alarmOffSet = 6;
      break;
    case 2:
      alarmOffSet = 5;
      break;
    case 3:
      alarmOffSet = 5;
      break;
    case 4:
      alarmOffSet = 4;
      break;
    case 5:
      alarmOffSet = 3;
      break;
    case 6:
      alarmOffSet = 2;
      break;
    case 7:
      alarmOffSet = 2;
      break;
    case 8:
      alarmOffSet = 3;
      break;
    case 9:
      alarmOffSet = 4;
      break;
    case 10:
      alarmOffSet = 5;
      break;
    case 11:
      alarmOffSet = 6;
      break;
    case 12:
      alarmOffSet = 6;
      break;
  }
}
// function dayLightSaving  //Daylight saving periodes for The Netherlands
void dayLightSaving() {
  boolean daylightSavingNew = false;

  switch (yr) {
    case 2017:
      if ((mo == 3 && dy >= 26) || (mo > 3 && mo < 10) || (mo == 10 && dy < 29)) daylightSavingNew = true;
      break;
    case 2018:
      if ((mo == 3 && dy >= 25) || (mo > 3 && mo < 10) || (mo == 10 && dy < 28)) daylightSavingNew = true;
      break;
    case 2019:
      if ((mo == 3 && dy >= 31) || (mo > 3 && mo < 10) || (mo == 10 && dy < 27)) daylightSavingNew = true;
      break;
    case 2020:
      if ((mo == 3 && dy >= 29) || (mo > 3 && mo < 10) || (mo == 10 && dy < 25)) daylightSavingNew = true;
      break;
    case 2021:
      if ((mo == 3 && dy >= 28) || (mo > 3 && mo < 10) || (mo == 10 && dy < 31)) daylightSavingNew = true;
      break;
    case 2022:
      if ((mo == 3 && dy >= 27) || (mo > 3 && mo < 10) || (mo == 10 && dy < 30)) daylightSavingNew = true;
      break;
    case 2023:
      if ((mo == 3 && dy >= 26) || (mo > 3 && mo < 10) || (mo == 10 && dy < 29)) daylightSavingNew = true;
      break;
    case 2024:
      if ((mo == 3 && dy >= 31) || (mo > 3 && mo < 10) || (mo == 10 && dy < 27)) daylightSavingNew = true;
      break;
    case 2025:
      if ((mo == 3 && dy >= 30) || (mo > 3 && mo < 10) || (mo == 10 && dy < 26)) daylightSavingNew = true;
      break;
    case 2026:
      if ((mo == 3 && dy >= 29) || (mo > 3 && mo < 10) || (mo == 10 && dy < 25)) daylightSavingNew = true;
      break;
    case 2027:
      if ((mo == 3 && dy >= 28) || (mo > 3 && mo < 10) || (mo == 10 && dy < 31)) daylightSavingNew = true;
      break;
    case 2028:
      if ((mo == 3 && dy >= 26) || (mo > 3 && mo < 10) || (mo == 10 && dy < 29)) daylightSavingNew = true;
      break;
    case 2029:
      if ((mo == 3 && dy >= 25) || (mo > 3 && mo < 10) || (mo == 10 && dy < 28)) daylightSavingNew = true;
      break;
  }
  if (daylightSavingNew != daylightSaving) {
    if (hr > 2) {
      if (daylightSavingNew) hr = hr + 1;
      if (!daylightSavingNew) hr = hr - 1;
      daylightSaving = daylightSavingNew;
    }
  }
}
Credits

ozyRonald

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Alarm Clock and Timer Working Standalone

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Alarm Clock and Timer Working Standalone

Alarm Clock and Timer Working Standalone

Things used in this project

Hardware components

Story

Overview

How it works

Schematics

clock alarm schema

Bread board

Code

clock alarm timer

Credits

ozyRonald

Comments

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