Pomodoro with Arduino!

Feeling bored with mobile pomodoro app? Why not building one for yourself! This project provides users to focus based on your preferences!

Dec 2, 2022

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1 respects

Devices & Components

Arduino Uno Rev3

Resistor 221 ohm

Pushbutton Switch, Push-Pull

Alphanumeric LCD, 16 x 2

Rotary potentiometer (generic)

Solderless Breadboard Full Size

Buzzer

Jumper wires (generic)

Software & Tools

Arduino IDE

Project description

Code

Pomodoro codiing

arduino

1#include <LiquidCrystal.h>
2//LCD pinMode setup
3const int rs = 12,  en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
4LiquidCrystal lcd(rs, en, d4, d5, d6,  d7);
5
6//music tone setup for "SO" (G), "LA" (A), "TI" (B), "DO" (C)
7int  abc[] = {3920, 4400, 4940, 5230};
8
9//variables declaration
10signed short  minutes, secondes;
11char timeline[16];
12char countf[16];
13int buzzerpin =  7;
14int rightButton = 8;
15int leftButton = 9;
16int selectButton = 10;
17int  menu = 1;
18int flag = 0;
19int count = 0;
20int mins;
21int sec;
22int total;
23
24//-----------------------------------------  SETUP PROGRAM ---------------------------------------------------
25void setup(){
26  lcd.begin(16,2);
27  pinMode(rightButton, INPUT_PULLUP);
28  pinMode(leftButton,  INPUT_PULLUP);
29  pinMode(selectButton, INPUT_PULLUP);
30  pinMode(buzzerpin,  OUTPUT);
31
32  lcd.setCursor(3,0);
33  lcd.print("WELCOME TO");
34  for(int  i = 0; i < 4; i++) //playing welcoming melody
35  {
36    mtone(buzzerpin, abc[i],  500); 
37    delay(50);
38    lcd.setCursor(4,1);
39  lcd.print("POMODORO");
40  }
41
42  updateMenu();
43
44}
45//------------------------------------- PUSHBUTTON  INPUT DETECTION ---------------------------------------------
46//flag 0 for "auto"  and "custom"  (general mode) menu interface
47//flag 1 for "Yes" and "no"  (continue confirmation) menu interface
48//flag 2 for custom option mode menu interface
49//mtone()  function play a tone if sny switch was pressed
50//Notice that there is a tone  different between "select button" and "left/right buttion"
51
52void loop(){
53  if(!digitalRead(leftButton)){
54    mtone(buzzerpin, abc[0], 50); 
55    menu++;
56    if (flag == 0){
57      mtone(buzzerpin, abc[0], 50); 
58      updateMenu();
59    }
60    else if (flag == 1){
61      mtone(buzzerpin, abc[0], 50); 
62      updateMenu2();
63    }
64    else if (flag == 2){
65      mtone(buzzerpin, abc[0], 50); 
66      updateMenu3();
67    }
68    delay(100);
69    while(!digitalRead(leftButton));
70  }
71  if(!digitalRead(rightButton)){
72   
73    menu--;
74    if (flag == 0){
75      mtone(buzzerpin, abc[0], 100);  // abc[i] tone sound for 0.5 second
76      updateMenu();
77    }
78    else  if (flag == 1){
79      mtone(buzzerpin, abc[0], 100); // abc[i] tone sound for  0.5 second
80      updateMenu2();
81    }
82    else if (flag == 2){
83      mtone(buzzerpin,  abc[0], 100); // abc[i] tone sound for 0.5 second
84      updateMenu3();
85    }
86    delay(100);
87    while(!digitalRead(rightButton)); 
88  }
89  if(!digitalRead(selectButton)){
90    if (flag == 0){
91    mtone(buzzerpin, abc[3], 50); // abc[i] tone sound for  0.5 second
92    executeAction();
93    }
94    else if (flag == 1){
95     mtone(buzzerpin,  abc[3], 50); // abc[i] tone sound for 0.5 second
96    updateMenu2();
97    confirm();
98    }
99    else if (flag == 2){
100     mtone(buzzerpin, abc[3], 50); // abc[i]  tone sound for 0.5 second
101    action2();
102    }
103    delay(100);
104    while(!digitalRead(selectButton));
105  }
106  
107}
108//--------------------------------------------- General Mode Menu  Display -----------------------------------------------
109void updateMenu(){
110  switch(menu){
111    case 0: //auxiliary condition
112    menu = 1;
113    break;
114    
115    case 1: //Select option 1 - AUTO interface
116    lcd.clear();
117    lcd.print("----  OPTION ----");
118    lcd.setCursor(1,1);
119    lcd.print("~AUTO");
120    lcd.setCursor(9,1);
121    lcd.print("CUSTOM");
122    break;
123
124    case 2: //Select option 2- CUSTOM  interface
125    lcd.clear();
126    lcd.print("---- OPTION ----");
127    lcd.setCursor(2,1);
128    lcd.print("AUTO");
129    lcd.setCursor(8,1);
130    lcd.print("~CUSTOM");
131    break;
132
133    case 3:
134    menu = 2;
135    break;
136  }
137}
138//-------------------------------------------  Function Execution for auto and custom ----------------------------------
139void  executeAction(){
140    switch(menu){
141      case 1:
142      flag = 0;
143      delay(100);
144      action1();
145      break;
146
147      case 2:
148      menu = 1;
149      flag  = 2;
150      updateMenu3();
151      break;
152    }
153}
154
155void action1(){
156  lcd.clear();
157  lcd.print("---- ALERT! ----");
158  buzz();
159  for (int  i=5;i>=0;i--){
160    lcd.setCursor(1,1);
161    lcd.print("GET READY IN ");
162    lcd.setCursor(14,1);
163    lcd.print(i);
164    delay(1000);
165  }
166
167  timedisplay();
168  delay(2000);
169}
170
171//-----------------------------------  custom mode menu display ----------------------------------==
172void updateMenu3(){
173  switch(menu){
174    case 0: //auxiliary condition
175    menu = 1;
176    break;
177    
178    case 1: //Select option 1 - AUTO interface
179    delay(100);
180    lcd.clear();
181    lcd.print("---- OPTION ----");
182    lcd.setCursor(1,1);
183    lcd.print("~1HR");
184    lcd.setCursor(7,1);
185    lcd.print("2HR");
186    lcd.setCursor(12,1);
187    lcd.print("3HR");
188    break;
189
190    case 2: //Select option 2- CUSTOM  interface
191    delay(100);
192    lcd.clear();
193    lcd.print("---- OPTION  ----");
194    lcd.setCursor(2,1);
195    lcd.print("1HR");
196    lcd.setCursor(6,1);
197    lcd.print("~2HR");
198    lcd.setCursor(12,1);
199    lcd.print("3HR");
200    break;
201
202    case 3:
203    delay(100);
204    lcd.clear();
205    lcd.print("----  OPTION ----");
206    lcd.setCursor(2,1);
207    lcd.print("1HR");
208    lcd.setCursor(7,1);
209    lcd.print("2HR");
210    lcd.setCursor(11,1);
211    lcd.print("~3HR");
212    break;
213
214    case 4: //Select option 1 - AUTO interface
215    delay(100);
216    lcd.clear();
217    lcd.print("---- OPTION ----");
218    lcd.setCursor(1,1);
219    lcd.print("~4HR");
220    lcd.setCursor(7,1);
221    lcd.print("5HR");
222    lcd.setCursor(12,1);
223    lcd.print("6HR");
224    break;
225
226    case  5: //Select option 2- CUSTOM interface
227    delay(100);
228    lcd.clear();
229    lcd.print("---- OPTION ----");
230    lcd.setCursor(2,1);
231    lcd.print("4HR");
232    lcd.setCursor(6,1);
233    lcd.print("~5HR");
234    lcd.setCursor(12,1);
235    lcd.print("6HR");
236    break;
237
238    case 6:
239    delay(100);
240    lcd.clear();
241    lcd.print("---- OPTION ----");
242    lcd.setCursor(2,1);
243    lcd.print("4HR");
244    lcd.setCursor(7,1);
245    lcd.print("5HR");
246    lcd.setCursor(11,1);
247    lcd.print("~6HR");
248    break;
249
250    case  7: //Select option 1 - AUTO interface
251    delay(100);
252    lcd.clear();
253    lcd.print("---- OPTION ----");
254    lcd.setCursor(1,1);
255    lcd.print("~7HR");
256    lcd.setCursor(7,1);
257    lcd.print("8HR");
258    lcd.setCursor(12,1);
259    lcd.print("BCK");
260    break;
261
262    case 8: //Select option 2- CUSTOM  interface
263    delay(100);
264    lcd.clear();
265    lcd.print("---- OPTION  ----");
266    lcd.setCursor(2,1);
267    lcd.print("7HR");
268    lcd.setCursor(6,1);
269    lcd.print("~8HR");
270    lcd.setCursor(12,1);
271    lcd.print("BCK");
272    break;
273
274    case 9:
275    delay(100);
276    lcd.clear();
277    lcd.print("----  OPTION ----");
278    lcd.setCursor(2,1);
279    lcd.print("7HR");
280    lcd.setCursor(7,1);
281    lcd.print("8HR");
282    lcd.setCursor(11,1);
283    lcd.print("~BCK");
284    break;
285
286    case 10:
287    menu = 9;
288    break;
289  }
290}
291
292//--------------------------  Function execution for each custom mode option -----------------------------------------
293void  action2(){                     
294    switch(menu){
295      case 0:
296      menu  = 1;
297      break;
298      
299      case 1:
300      lcd.clear();
301      flag  = 2;
302      for (int i = 0; i < 2; i++){
303      action1();
304      }
305      lcd.clear();
306      lcd.print("SESSION");
307      
308      lcd.setCursor(0,1);
309      lcd.print("ENDED");
310      for (int i = 0; i <3; i++){
311        digitalWrite(buzzerpin, HIGH);
312        delay(100);
313        digitalWrite(buzzerpin, LOW);
314        delay(100);
315      }
316      delay(2000);
317      updateMenu3();
318      flag = 2;
319      count  = 0;
320      break;
321
322      case 2:
323      lcd.clear();
324      flag =  2;
325      for (int i = 0; i < 4; i++){
326      action1();
327      }
328      lcd.clear();
329      lcd.print("SESSION");
330      lcd.setCursor(0,1);
331      lcd.print("ENDED");
332      for (int i = 0; i <3; i++){
333        digitalWrite(buzzerpin, HIGH);
334        delay(100);
335        digitalWrite(buzzerpin, LOW);
336        delay(100);
337      }
338      delay(1000);
339      updateMenu3();
340      flag = 2;
341      count  = 0;
342      break;
343
344      case 3:
345      lcd.clear();
346      flag =  2;
347      for (int i = 0; i < 6; i++){
348      action1();
349      }
350      lcd.clear();
351      lcd.print("SESSION");
352      lcd.setCursor(0,1);
353      lcd.print("ENDED");
354      for (int i = 0; i <3; i++){
355        digitalWrite(buzzerpin, HIGH);
356        delay(100);
357        digitalWrite(buzzerpin, LOW);
358        delay(100);
359      }
360      delay(1000);
361      updateMenu3();
362      flag = 2;
363      count  = 0;
364      break;
365
366      case 4:
367      lcd.clear();
368      flag =  2;
369      for (int i = 0; i < 8; i++){
370      action1();
371      }
372      lcd.clear();
373      lcd.print("SESSION");
374      lcd.setCursor(0,1);
375      lcd.print("ENDED");
376      for (int i = 0; i <3; i++){
377        digitalWrite(buzzerpin, HIGH);
378        delay(100);
379        digitalWrite(buzzerpin, LOW);
380        delay(100);
381      }
382      delay(1000);
383      updateMenu3();
384      flag = 2;
385      count  = 0;
386      break;
387
388      case 5:
389      lcd.clear();
390      flag =  2;
391      for (int i = 0; i < 10; i++){
392      action1();
393      }
394      lcd.clear();
395      lcd.print("SESSION");
396      lcd.setCursor(0,1);
397      lcd.print("ENDED");
398      for (int i = 0; i <3; i++){
399        digitalWrite(buzzerpin, HIGH);
400        delay(100);
401        digitalWrite(buzzerpin, LOW);
402        delay(100);
403      }
404      delay(1000);
405      updateMenu3();
406      flag = 2;
407      count  = 0;
408      break;
409
410      case 6:
411      lcd.clear();
412      flag =  2;
413      for (int i = 0; i < 7; i++){
414      action1();
415      }
416      lcd.clear();
417      lcd.print("SESSION");
418      lcd.setCursor(0,1);
419      lcd.print("ENDED");
420      for (int i = 0; i <3; i++){
421        digitalWrite(buzzerpin, HIGH);
422        delay(100);
423        digitalWrite(buzzerpin, LOW);
424        delay(100);
425      }
426      delay(1000);
427      updateMenu3();
428      flag = 2;
429      count  = 0;
430      break;
431
432      case 7:
433      lcd.clear();
434      flag =  2;
435      for (int i = 0; i < 8; i++){
436      action1();
437      }
438      lcd.clear();
439      lcd.print("SESSION");
440      lcd.setCursor(0,1);
441      lcd.print("ENDED");
442      for (int i = 0; i <3; i++){
443        digitalWrite(buzzerpin, HIGH);
444        delay(100);
445        digitalWrite(buzzerpin, LOW);
446        delay(100);
447      }
448      delay(1000);
449      updateMenu3();
450      flag = 2;
451      count  = 0;
452      break;
453
454      case 8:
455      lcd.clear();
456      flag =  2;
457      for (int i = 0; i < 9; i++){
458      action1();
459      }
460      lcd.clear();
461      lcd.print("SESSION");
462      lcd.setCursor(0,1);
463      lcd.print("ENDED");
464      for (int i = 0; i <3; i++){
465        digitalWrite(buzzerpin, HIGH);
466        delay(100);
467        digitalWrite(buzzerpin, LOW);
468        delay(100);
469      }
470      delay(1000);
471      updateMenu3();
472      flag = 2;
473      count  = 0;
474      break;
475
476      case 9:
477      menu = 1;
478      flag = 0;
479      updateMenu();
480      
481      break;
482
483      case 10:
484      menu  = 9;
485      break;
486  }
487  
488}
489
490//---------------------- 30 minutes  pomodoro session program ---------------------------------------
491void timedisplay(){
492  minutes = 25;
493  secondes = 0;
494 
495  lcd.clear();
496  lcd.print("--- FOCUSING  ---");
497  
498  while (minutes != 0 or secondes != 0){
499    if(secondes ==  0){
500      lcd.setCursor(0,1);
501      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
502      lcd.print(timeline);
503      delay(300);
504      lcd.setCursor(7,1);
505      lcd.print(":");
506      lcd.setCursor(8,1);
507      lcd.print(":");
508      lcd.setCursor(7,1);
509      lcd.print("");
510      lcd.setCursor(8,1);
511      lcd.print("");
512      delay(700);
513      secondes  = 59;
514      minutes --;
515    }
516    else{
517      lcd.setCursor(0,1);
518      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
519      lcd.print(timeline);
520      delay(300);
521      lcd.setCursor(7,1);
522      lcd.print(":");
523      lcd.setCursor(8,1);
524      lcd.print(":");
525      lcd.setCursor(7,1);
526      lcd.print("");
527      lcd.setCursor(8,1);
528      lcd.print("");
529      delay(700);
530      secondes  --;
531    }
532  }
533  lcd.setCursor(0,1);
534  sprintf(timeline,"    %0.2d ::  %0.2d  ", minutes, secondes);
535  lcd.print(timeline);
536  delay(1000);
537  lcd.clear();
538  lcd.print("-- COMPLETED! --");
539  buzz();
540  lcd.setCursor(3,1);
541  lcd.print("REST  TIME");
542  delay(2000);
543
544  minutes = 5;
545  secondes = 0;
546  
547  lcd.clear();
548  lcd.print("----- REST -----");
549  while (minutes != 0 or secondes != 0){
550    if(secondes == 0){
551      lcd.setCursor(0,1);
552      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
553      lcd.print(timeline);
554      delay(300);
555      lcd.setCursor(7,1);
556      lcd.print(":");
557      lcd.setCursor(8,1);
558      lcd.print(":");
559      lcd.setCursor(7,1);
560      lcd.print("");
561      lcd.setCursor(8,1);
562      lcd.print("");
563      delay(700);
564      secondes  = 59;
565      minutes --;
566    }
567    else{
568      lcd.setCursor(0,1);
569      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
570      lcd.print(timeline);
571      delay(300);
572      lcd.setCursor(7,1);
573      lcd.print(":");
574      lcd.setCursor(8,1);
575      lcd.print(":");
576      lcd.setCursor(7,1);
577      lcd.print("");
578      lcd.setCursor(8,1);
579      lcd.print("");
580      delay(700);
581      secondes  --;
582    }
583  }
584  lcd.setCursor(0,1);
585  sprintf(timeline,"    %0.2d ::  %0.2d  ", minutes, secondes);
586  lcd.print(timeline);
587  delay(1000);
588  
589  count++;
590  total = count * 30;
591      if (total >= 60){
592        mins =  total /60;
593        sec = total%60;
594      }
595      else{
596        mins  = 0;
597        sec = total;
598      }
599   lcd.clear();
600      lcd.print("--  CHECKPOINT --");
601        digitalWrite(buzzerpin, HIGH);
602        delay(100);
603        digitalWrite(buzzerpin, LOW);
604        delay(100);
605      lcd.setCursor(0,1);
606      sprintf(countf, "COUNT:%0.2d   %0.2d:%0.2d", count, mins, sec);
607      lcd.print(countf);
608      delay(1000);
609  if (flag == 0){
610  updateMenu2();
611  flag = 1;
612  }
613  }
614
615//---------------------------- confirmation menu display -----------------------------------
616void  updateMenu2(){
617
618  switch(menu){
619    case 0: //auxiliary condition
620    menu  = 1;
621    break;
622    
623    case 1: //Select option 1 - YES interface
624    lcd.clear();
625    lcd.print("-- CONTINUE ? --");
626    lcd.setCursor(2,1);
627    lcd.print("~YES");
628    lcd.setCursor(11,1);
629    lcd.print("NO");
630    break;
631
632    case 2: //Select option 2- NO interface
633    lcd.clear();
634    lcd.print("-- CONTINUE ? --");
635    lcd.setCursor(3,1);
636    lcd.print("YES");
637    lcd.setCursor(10,1);
638    lcd.print("~NO");
639    break;
640
641    case  3:
642    menu = 2;
643    break;
644  }
645}
646
647//-------------------- confirmation  to continue execution ---------------------------------------
648void confirm(){
649     switch(menu){
650      case 1:
651      delay(100);
652      flag = 0;
653      action1();
654      break;
655
656      case 2:
657      delay(100);
658      flag  = 0;
659      menu = 1;
660      total = count * 30;
661      if (total >= 60){
662        mins = total /60;
663        sec = total%60;
664      }
665      else{
666        mins = 0;
667        sec = total;
668      }
669      lcd.clear();
670      lcd.print("----  SUMMARY ----");
671      lcd.setCursor(0,1);
672      sprintf(countf, "COUNT:%0.2d   %0.2d:%0.2d", count, mins, sec);
673      lcd.print(countf);
674      delay(2000);
675      count = 0;
676
677      
678      updateMenu();
679      break;
680     }
681}
682
683//  ------------------------ buzzer execution -------------------------------
684void  buzz(){
685  for (int i = 0; i <3; i++){
686        digitalWrite(buzzerpin, HIGH);
687        delay(50);
688        digitalWrite(buzzerpin, LOW);
689        delay(50);
690      }
691}
692
693//------------------------- welcoming message execution ---------------------
694void  mtone(int dx, int hz, unsigned long tm)
695{
696  unsigned long t = millis();
697  unsigned long ns = (long)500000 / hz;
698  
699  // Repeats for tm milliseconds.
700  // Sounds for tm milliseconds
701  while(millis() - t < tm)
702  {
703    digitalWrite(dx,  HIGH);
704    delayMicroseconds(ns);
705    digitalWrite(dx, LOW);
706    delayMicroseconds(ns);
707  }
708}

#include <LiquidCrystal.h>
//LCD pinMode setup
const int rs = 12,  en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6,  d7);

//music tone setup for "SO" (G), "LA" (A), "TI" (B), "DO" (C)
int  abc[] = {3920, 4400, 4940, 5230};

//variables declaration
signed short  minutes, secondes;
char timeline[16];
char countf[16];
int buzzerpin =  7;
int rightButton = 8;
int leftButton = 9;
int selectButton = 10;
int  menu = 1;
int flag = 0;
int count = 0;
int mins;
int sec;
int total;

//-----------------------------------------  SETUP PROGRAM ---------------------------------------------------
void setup(){
  lcd.begin(16,2);
  pinMode(rightButton, INPUT_PULLUP);
  pinMode(leftButton,  INPUT_PULLUP);
  pinMode(selectButton, INPUT_PULLUP);
  pinMode(buzzerpin,  OUTPUT);

  lcd.setCursor(3,0);
  lcd.print("WELCOME TO");
  for(int  i = 0; i < 4; i++) //playing welcoming melody
  {
    mtone(buzzerpin, abc[i],  500); 
    delay(50);
    lcd.setCursor(4,1);
  lcd.print("POMODORO");
  }

  updateMenu();

}
//------------------------------------- PUSHBUTTON  INPUT DETECTION ---------------------------------------------
//flag 0 for "auto"  and "custom"  (general mode) menu interface
//flag 1 for "Yes" and "no"  (continue confirmation) menu interface
//flag 2 for custom option mode menu interface
//mtone()  function play a tone if sny switch was pressed
//Notice that there is a tone  different between "select button" and "left/right buttion"

void loop(){
  if(!digitalRead(leftButton)){
    mtone(buzzerpin, abc[0], 50); 
    menu++;
    if (flag == 0){
      mtone(buzzerpin, abc[0], 50); 
      updateMenu();
    }
    else if (flag == 1){
      mtone(buzzerpin, abc[0], 50); 
      updateMenu2();
    }
    else if (flag == 2){
      mtone(buzzerpin, abc[0], 50); 
      updateMenu3();
    }
    delay(100);
    while(!digitalRead(leftButton));
  }
  if(!digitalRead(rightButton)){
   
    menu--;
    if (flag == 0){
      mtone(buzzerpin, abc[0], 100);  // abc[i] tone sound for 0.5 second
      updateMenu();
    }
    else  if (flag == 1){
      mtone(buzzerpin, abc[0], 100); // abc[i] tone sound for  0.5 second
      updateMenu2();
    }
    else if (flag == 2){
      mtone(buzzerpin,  abc[0], 100); // abc[i] tone sound for 0.5 second
      updateMenu3();
    }
    delay(100);
    while(!digitalRead(rightButton)); 
  }
  if(!digitalRead(selectButton)){
    if (flag == 0){
    mtone(buzzerpin, abc[3], 50); // abc[i] tone sound for  0.5 second
    executeAction();
    }
    else if (flag == 1){
     mtone(buzzerpin,  abc[3], 50); // abc[i] tone sound for 0.5 second
    updateMenu2();
    confirm();
    }
    else if (flag == 2){
     mtone(buzzerpin, abc[3], 50); // abc[i]  tone sound for 0.5 second
    action2();
    }
    delay(100);
    while(!digitalRead(selectButton));
  }
  
}
//--------------------------------------------- General Mode Menu  Display -----------------------------------------------
void updateMenu(){
  switch(menu){
    case 0: //auxiliary condition
    menu = 1;
    break;
    
    case 1: //Select option 1 - AUTO interface
    lcd.clear();
    lcd.print("----  OPTION ----");
    lcd.setCursor(1,1);
    lcd.print("~AUTO");
    lcd.setCursor(9,1);
    lcd.print("CUSTOM");
    break;

    case 2: //Select option 2- CUSTOM  interface
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("AUTO");
    lcd.setCursor(8,1);
    lcd.print("~CUSTOM");
    break;

    case 3:
    menu = 2;
    break;
  }
}
//-------------------------------------------  Function Execution for auto and custom ----------------------------------
void  executeAction(){
    switch(menu){
      case 1:
      flag = 0;
      delay(100);
      action1();
      break;

      case 2:
      menu = 1;
      flag  = 2;
      updateMenu3();
      break;
    }
}

void action1(){
  lcd.clear();
  lcd.print("---- ALERT! ----");
  buzz();
  for (int  i=5;i>=0;i--){
    lcd.setCursor(1,1);
    lcd.print("GET READY IN ");
    lcd.setCursor(14,1);
    lcd.print(i);
    delay(1000);
  }

  timedisplay();
  delay(2000);
}

//-----------------------------------  custom mode menu display ----------------------------------==
void updateMenu3(){
  switch(menu){
    case 0: //auxiliary condition
    menu = 1;
    break;
    
    case 1: //Select option 1 - AUTO interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(1,1);
    lcd.print("~1HR");
    lcd.setCursor(7,1);
    lcd.print("2HR");
    lcd.setCursor(12,1);
    lcd.print("3HR");
    break;

    case 2: //Select option 2- CUSTOM  interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION  ----");
    lcd.setCursor(2,1);
    lcd.print("1HR");
    lcd.setCursor(6,1);
    lcd.print("~2HR");
    lcd.setCursor(12,1);
    lcd.print("3HR");
    break;

    case 3:
    delay(100);
    lcd.clear();
    lcd.print("----  OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("1HR");
    lcd.setCursor(7,1);
    lcd.print("2HR");
    lcd.setCursor(11,1);
    lcd.print("~3HR");
    break;

    case 4: //Select option 1 - AUTO interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(1,1);
    lcd.print("~4HR");
    lcd.setCursor(7,1);
    lcd.print("5HR");
    lcd.setCursor(12,1);
    lcd.print("6HR");
    break;

    case  5: //Select option 2- CUSTOM interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("4HR");
    lcd.setCursor(6,1);
    lcd.print("~5HR");
    lcd.setCursor(12,1);
    lcd.print("6HR");
    break;

    case 6:
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("4HR");
    lcd.setCursor(7,1);
    lcd.print("5HR");
    lcd.setCursor(11,1);
    lcd.print("~6HR");
    break;

    case  7: //Select option 1 - AUTO interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION ----");
    lcd.setCursor(1,1);
    lcd.print("~7HR");
    lcd.setCursor(7,1);
    lcd.print("8HR");
    lcd.setCursor(12,1);
    lcd.print("BCK");
    break;

    case 8: //Select option 2- CUSTOM  interface
    delay(100);
    lcd.clear();
    lcd.print("---- OPTION  ----");
    lcd.setCursor(2,1);
    lcd.print("7HR");
    lcd.setCursor(6,1);
    lcd.print("~8HR");
    lcd.setCursor(12,1);
    lcd.print("BCK");
    break;

    case 9:
    delay(100);
    lcd.clear();
    lcd.print("----  OPTION ----");
    lcd.setCursor(2,1);
    lcd.print("7HR");
    lcd.setCursor(7,1);
    lcd.print("8HR");
    lcd.setCursor(11,1);
    lcd.print("~BCK");
    break;

    case 10:
    menu = 9;
    break;
  }
}

//--------------------------  Function execution for each custom mode option -----------------------------------------
void  action2(){                     
    switch(menu){
      case 0:
      menu  = 1;
      break;
      
      case 1:
      lcd.clear();
      flag  = 2;
      for (int i = 0; i < 2; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(2000);
      updateMenu3();
      flag = 2;
      count  = 0;
      break;

      case 2:
      lcd.clear();
      flag =  2;
      for (int i = 0; i < 4; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count  = 0;
      break;

      case 3:
      lcd.clear();
      flag =  2;
      for (int i = 0; i < 6; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count  = 0;
      break;

      case 4:
      lcd.clear();
      flag =  2;
      for (int i = 0; i < 8; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count  = 0;
      break;

      case 5:
      lcd.clear();
      flag =  2;
      for (int i = 0; i < 10; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count  = 0;
      break;

      case 6:
      lcd.clear();
      flag =  2;
      for (int i = 0; i < 7; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count  = 0;
      break;

      case 7:
      lcd.clear();
      flag =  2;
      for (int i = 0; i < 8; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count  = 0;
      break;

      case 8:
      lcd.clear();
      flag =  2;
      for (int i = 0; i < 9; i++){
      action1();
      }
      lcd.clear();
      lcd.print("SESSION");
      lcd.setCursor(0,1);
      lcd.print("ENDED");
      for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      }
      delay(1000);
      updateMenu3();
      flag = 2;
      count  = 0;
      break;

      case 9:
      menu = 1;
      flag = 0;
      updateMenu();
      
      break;

      case 10:
      menu  = 9;
      break;
  }
  
}

//---------------------- 30 minutes  pomodoro session program ---------------------------------------
void timedisplay(){
  minutes = 25;
  secondes = 0;
 
  lcd.clear();
  lcd.print("--- FOCUSING  ---");
  
  while (minutes != 0 or secondes != 0){
    if(secondes ==  0){
      lcd.setCursor(0,1);
      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
      lcd.print(timeline);
      delay(300);
      lcd.setCursor(7,1);
      lcd.print(":");
      lcd.setCursor(8,1);
      lcd.print(":");
      lcd.setCursor(7,1);
      lcd.print("");
      lcd.setCursor(8,1);
      lcd.print("");
      delay(700);
      secondes  = 59;
      minutes --;
    }
    else{
      lcd.setCursor(0,1);
      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
      lcd.print(timeline);
      delay(300);
      lcd.setCursor(7,1);
      lcd.print(":");
      lcd.setCursor(8,1);
      lcd.print(":");
      lcd.setCursor(7,1);
      lcd.print("");
      lcd.setCursor(8,1);
      lcd.print("");
      delay(700);
      secondes  --;
    }
  }
  lcd.setCursor(0,1);
  sprintf(timeline,"    %0.2d ::  %0.2d  ", minutes, secondes);
  lcd.print(timeline);
  delay(1000);
  lcd.clear();
  lcd.print("-- COMPLETED! --");
  buzz();
  lcd.setCursor(3,1);
  lcd.print("REST  TIME");
  delay(2000);

  minutes = 5;
  secondes = 0;
  
  lcd.clear();
  lcd.print("----- REST -----");
  while (minutes != 0 or secondes != 0){
    if(secondes == 0){
      lcd.setCursor(0,1);
      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
      lcd.print(timeline);
      delay(300);
      lcd.setCursor(7,1);
      lcd.print(":");
      lcd.setCursor(8,1);
      lcd.print(":");
      lcd.setCursor(7,1);
      lcd.print("");
      lcd.setCursor(8,1);
      lcd.print("");
      delay(700);
      secondes  = 59;
      minutes --;
    }
    else{
      lcd.setCursor(0,1);
      sprintf(timeline,"    %0.2d    %0.2d  ", minutes, secondes);
      lcd.print(timeline);
      delay(300);
      lcd.setCursor(7,1);
      lcd.print(":");
      lcd.setCursor(8,1);
      lcd.print(":");
      lcd.setCursor(7,1);
      lcd.print("");
      lcd.setCursor(8,1);
      lcd.print("");
      delay(700);
      secondes  --;
    }
  }
  lcd.setCursor(0,1);
  sprintf(timeline,"    %0.2d ::  %0.2d  ", minutes, secondes);
  lcd.print(timeline);
  delay(1000);
  
  count++;
  total = count * 30;
      if (total >= 60){
        mins =  total /60;
        sec = total%60;
      }
      else{
        mins  = 0;
        sec = total;
      }
   lcd.clear();
      lcd.print("--  CHECKPOINT --");
        digitalWrite(buzzerpin, HIGH);
        delay(100);
        digitalWrite(buzzerpin, LOW);
        delay(100);
      lcd.setCursor(0,1);
      sprintf(countf, "COUNT:%0.2d   %0.2d:%0.2d", count, mins, sec);
      lcd.print(countf);
      delay(1000);
  if (flag == 0){
  updateMenu2();
  flag = 1;
  }
  }

//---------------------------- confirmation menu display -----------------------------------
void  updateMenu2(){

  switch(menu){
    case 0: //auxiliary condition
    menu  = 1;
    break;
    
    case 1: //Select option 1 - YES interface
    lcd.clear();
    lcd.print("-- CONTINUE ? --");
    lcd.setCursor(2,1);
    lcd.print("~YES");
    lcd.setCursor(11,1);
    lcd.print("NO");
    break;

    case 2: //Select option 2- NO interface
    lcd.clear();
    lcd.print("-- CONTINUE ? --");
    lcd.setCursor(3,1);
    lcd.print("YES");
    lcd.setCursor(10,1);
    lcd.print("~NO");
    break;

    case  3:
    menu = 2;
    break;
  }
}

//-------------------- confirmation  to continue execution ---------------------------------------
void confirm(){
     switch(menu){
      case 1:
      delay(100);
      flag = 0;
      action1();
      break;

      case 2:
      delay(100);
      flag  = 0;
      menu = 1;
      total = count * 30;
      if (total >= 60){
        mins = total /60;
        sec = total%60;
      }
      else{
        mins = 0;
        sec = total;
      }
      lcd.clear();
      lcd.print("----  SUMMARY ----");
      lcd.setCursor(0,1);
      sprintf(countf, "COUNT:%0.2d   %0.2d:%0.2d", count, mins, sec);
      lcd.print(countf);
      delay(2000);
      count = 0;

      
      updateMenu();
      break;
     }
}

//  ------------------------ buzzer execution -------------------------------
void  buzz(){
  for (int i = 0; i <3; i++){
        digitalWrite(buzzerpin, HIGH);
        delay(50);
        digitalWrite(buzzerpin, LOW);
        delay(50);
      }
}

//------------------------- welcoming message execution ---------------------
void  mtone(int dx, int hz, unsigned long tm)
{
  unsigned long t = millis();
  unsigned long ns = (long)500000 / hz;
  
  // Repeats for tm milliseconds.
  // Sounds for tm milliseconds
  while(millis() - t < tm)
  {
    digitalWrite(dx,  HIGH);
    delayMicroseconds(ns);
    digitalWrite(dx, LOW);
    delayMicroseconds(ns);
  }
}

Downloadable files

Schematic diagram via Tinker CAD.

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