Multifunctional Watch With Arduino Uno

#include <LiquidCrystal.h>      //  
#include <Button.h>             //  
#include <DS3231.h>             //  RTC

int buzzer = 13;                                                //set  .   13
uint8_t hh = 0, mm = 0, ss = 0;                                 //set  ,, RTC
uint8_t timerMode = 0 ,setMode=0, setAlarm=0, alarmMode=0 ;     //set    
uint8_t alarmHH =0 ,alarmMM =0 ,alarmSS=0;                      //   
uint8_t timerhh=0, timermm=0, timerss =0;                       //   
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);                          // LCD 
DS3231 rtc(SDA,SCL);                                            // RTC
Time t;                                                         //    t

#define DN_PIN 7                                                  //set  pin
#define UP_PIN 8                                                  //set  pin
#define SET_PIN 9                                                 //set  
#define ALR_PIN 10                                                //set   
#define PULLUP true                                               //aktifkan  
#define INVERT true                                               //If invert ==true,HIGH=released,LOW=pressed
#define DEBOUNCE_MS 20                                            //state  react with button
#define REPEAT_FIRST 500                                          //state  untuk tekan berapa lama button
#define REPEAT_INCR 100                                           // increase kan number

//Declare push buttons
Button btnDN(DN_PIN, PULLUP, INVERT, DEBOUNCE_MS);                //set 1st button utk decrement
Button btnUP(UP_PIN, PULLUP, INVERT, DEBOUNCE_MS);                //set 2nd button utk increment
Button btnSET(SET_PIN, PULLUP, INVERT, DEBOUNCE_MS);              //set button utk function timer
Button btnALR(ALR_PIN, PULLUP, INVERT, DEBOUNCE_MS);              //set button utk function alarm

enum {WAIT, INCR, DECR};                                          //The possible states for the state machine
uint8_t STATE;                                                    //The current state machine state
int count;                                                        //The number that is adjusted
int lastCount = -1;                                               //Previous value of count (initialized to ensure it's different when the sketch starts)
unsigned long rpt = REPEAT_FIRST;                                 //A variable time that is used to drive the repeats for long presses



void setup() {
  
Serial.begin(9600);
lcd.begin(16,2);
pinMode(buzzer,OUTPUT);
rtc.begin();
lcd.setCursor(0,0);
lcd.print("Welcome Shaqib!");
delay(2000);
lcd.clear();
//rtc.setTime(12,24,00);

}

void loop() {

t=rtc.getTime();
hh=t.hour,DEC;
mm=t.min,DEC;
ss=t.sec,DEC;

btnSET.read();
btnUP.read();                             
btnDN.read();
btnALR.read();

if(setMode==0 && setAlarm==0 ){
tunjukJamTemp();
tunjukTimer();}

if(setMode!=0 && setAlarm==0 && alarmMode==0 ){delay(100);}
if(setMode==1 && setAlarm==0 && alarmMode==0 ){lcd.setCursor(7,1);lcd.print("  ");delay(100);tunjukJamTemp();tunjukTimer();}
if(setMode==2 && setAlarm==0 && alarmMode==0 ){lcd.setCursor(10,1);lcd.print("  ");delay(100);tunjukJamTemp();tunjukTimer();}
if(setMode==3 && setAlarm==0 && alarmMode==0 ){lcd.setCursor(13,1);lcd.print("  ");delay(100);tunjukJamTemp();tunjukTimer();}
if(setMode==4 && setAlarm==0 && alarmMode==0 ){tunjukJamTemp();tunjukTimer();stepDown();delay(1000);}



if(setMode==0 && setAlarm!=0 && alarmMode==0 ){delay(100);}
if(setMode==0 && setAlarm==2 && alarmMode==0 ){lcd.setCursor(0,0);lcd.print("  ");delay(100);    lcd.setCursor(0,0);
    if(alarmHH<10){lcd.print("0");}
    lcd.print(alarmHH);lcd.print(":");
    if(alarmMM<10){lcd.print("0");}
    lcd.print(alarmMM);lcd.print(":");
    if(alarmSS<10){lcd.print("0");}
    lcd.print(alarmSS);lcd.setCursor(0,1);
    lcd.print("Set Your Alarm");}
if(setMode==0 && setAlarm==3 && alarmMode==0 ){lcd.setCursor(3,0);lcd.print("  ");delay(100);    lcd.setCursor(0,0);
    if(alarmHH<10){lcd.print("0");}
    lcd.print(alarmHH);lcd.print(":");
    if(alarmMM<10){lcd.print("0");}
    lcd.print(alarmMM);lcd.print(":");
    if(alarmSS<10){lcd.print("0");}
    lcd.print(alarmSS);lcd.setCursor(0,1);
    lcd.print("Set Your Alarm");}
if(setMode==0 && setAlarm==4 && alarmMode==0 ){lcd.setCursor(6,0);lcd.print("  ");delay(100);    lcd.setCursor(0,0);
    if(alarmHH<10){lcd.print("0");}
    lcd.print(alarmHH);lcd.print(":");
    if(alarmMM<10){lcd.print("0");}
    lcd.print(alarmMM);lcd.print(":");
    if(alarmSS<10){lcd.print("0");}
    lcd.print(alarmSS);lcd.setCursor(0,1);
    lcd.print("Set Your Alarm");}
if(setMode==0 && setAlarm==5 && alarmMode==0 ){alarmMode=1;setAlarm=0;}

setupAlarm();
Alarm(alarmHH,alarmMM);

btnSET.read();
btnUP.read();                             
btnDN.read();
btnALR.read();


switch (STATE) {
        
        case WAIT:                            
            if (btnSET.wasPressed())
               { setMode = setMode+1;}
            if (btnALR.wasPressed())
               { setAlarm = setAlarm+1;} 
            if (btnUP.wasPressed())
                STATE = INCR;
            else if (btnDN.wasPressed())
                STATE = DECR;
            else if (btnUP.wasReleased())    
                rpt = REPEAT_FIRST;
            else if (btnDN.wasReleased())
                rpt = REPEAT_FIRST;
            else if (btnUP.pressedFor(rpt)) {  
                rpt += REPEAT_INCR;            
                STATE = INCR;
            }
            else if (btnDN.pressedFor(rpt)) {
                rpt += REPEAT_INCR;
                STATE = DECR;
            }
            break;

        case INCR:                               
            if (setMode==1 && setAlarm==0 && alarmMode==0 && timerhh<23)timerhh=timerhh+1; 
            if (setMode==2 && setAlarm==0 && alarmMode==0 && timermm<59)timermm=timermm+1;
            if (setMode==3 && setAlarm==0 && alarmMode==0 && timerss<59)timerss=timerss+1;
            if (setMode==0 && setAlarm==2 && alarmMode==0 && alarmHH<23)alarmHH=alarmHH+1;
            if (setMode==0 && setAlarm==3 && alarmMode==0 && alarmMM<59)alarmMM=alarmMM+1;
            if (setMode==0 && setAlarm==4 && alarmMode==0 && alarmSS<59)alarmSS=alarmSS+1;
            STATE = WAIT;
            break;

        case DECR:                               
            if (setMode==1 && setAlarm==0 && alarmMode==0 && timerhh>0)timerhh=timerhh-1; 
            if (setMode==2 && setAlarm==0 && alarmMode==0 && timermm>0)timermm=timermm-1;
            if (setMode==3 && setAlarm==0 && alarmMode==0 && timerss>0)timerss=timerss-1;
            if (setMode==0 && setAlarm==2 && alarmMode==0 && alarmHH>0)alarmHH=alarmHH-1;
            if (setMode==0 && setAlarm==3 && alarmMode==0 && alarmMM>0)alarmMM=alarmMM-1;
            if (setMode==0 && setAlarm==4 && alarmMode==0 && alarmSS>0)alarmSS=alarmSS-1;
            STATE = WAIT;
            break;
    }
}

 void stepDown() {
 if (timerss > 0) {
 timerss -= 1;
 } else {
 if (timermm > 0) {
 timerss = 59;
 timermm -= 1;
 } else {
 if (timerhh > 0) {
 timerss = 59;
 timermm = 59;
 timerhh -= 1;
 } else {
  for(int i=0;i<30;i++){
lcd.setCursor(0,0);
lcd.print(rtc.getTimeStr());
lcd.setCursor(10,0);
lcd.print(rtc.getTemp());
lcd.print("C");
btnSET.read();
if(btnSET.wasPressed()){digitalWrite(buzzer,LOW);i=30;}else{
digitalWrite(buzzer,HIGH);
delay(500);
digitalWrite(buzzer,LOW);
delay(500);}
}
setMode=0;

  }
 }
 }
 }
 
void tunjukTimer(){
lcd.setCursor(0, 1);
 lcd.print("Timer:");
 lcd.print(" ");
 (timerhh < 10) ? lcd.print("0") : NULL;
 lcd.print(timerhh);
 lcd.print(":");
 (timermm < 10) ? lcd.print("0") : NULL;
 lcd.print(timermm);
 lcd.print(":");
 (timerss < 10) ? lcd.print("0") : NULL;
 lcd.print(timerss);
   }

void tunjukJamTemp(){
  lcd.setCursor(0,0);
lcd.print(rtc.getTimeStr());
lcd.setCursor(10,0);
lcd.print(rtc.getTemp());
lcd.print("C");

}

void Alarm(uint8_t alarmHH,uint8_t alarmMM){
  if(alarmMode==1 && alarmHH==hh && alarmMM==mm){
   for(int i=0;i<30;i++){
lcd.setCursor(0,0);
lcd.print(rtc.getTimeStr());
lcd.setCursor(10,0);
lcd.print(rtc.getTemp());
lcd.print("C");
lcd.setCursor(0, 1);
 lcd.print("Timer:");
 lcd.print(" ");
 (timerhh < 10) ? lcd.print("0") : NULL;
 lcd.print(timerhh);
 lcd.print(":");
 (timermm < 10) ? lcd.print("0") : NULL;
 lcd.print(timermm);
 lcd.print(":");
 (timerss < 10) ? lcd.print("0") : NULL;
 lcd.print(timerss);
 
btnALR.read();
if(btnALR.wasPressed()){digitalWrite(buzzer,LOW);i=30;}else{
digitalWrite(buzzer,HIGH);
delay(500);
digitalWrite(buzzer,LOW);
delay(500);}
    }
    alarmMode=0;
    setAlarm=0;
  }}

void setupAlarm(){
  if(setMode==0 && setAlarm==1 && alarmMode==0 ){
    lcd.clear();
    lcd.setCursor(0,1);
    lcd.print("Set Your Alarm");
    lcd.setCursor(0,0);
    if(alarmHH<10){lcd.print("0");}
    lcd.print(alarmHH);lcd.print(":");
    if(alarmMM<10){lcd.print("0");}
    lcd.print(alarmMM);lcd.print(":");
    if(alarmSS<10){lcd.print("0");}
    lcd.print(alarmSS);
  }
}