Beginner making a complex/modular alarm clock

jucifer_mourningstar · March 2, 2025, 11:42pm

hey guys, aside from breakbeam triggers and turning things on with the ambient light, this is my first project. feels like i'm getting close but i can't seem to figure out what i'm doing wrong

#include <DS3231.h>
#include <Wire.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd(2, 3, 4, 5, 6, 7);
const int blue= 13;  //
const int green= 12;
const int yellow= 10;
const int white= 9;
const int red= 8;
const int blueSTATE = 0;
const int greenSTATE = 0;
const int yellowSTATE = 0;
const int whiteSTATE = 0;
const int redSTATE = 0;
#define time now = time_t(1740942204);

 
DS3231 Clock;

byte year;
byte month;
byte date;
byte dOW;
byte hour;
byte minute;
byte second;
byte temperature;

void getDateStuff(byte& year, byte& month, byte& date, byte& dOW,
                  byte& hour, byte& minute, byte& second, byte& temperature) {
    // Call this if you notice something coming in on
    // the serial port. The stuff coming in should be in
    // the order YYMMDDwHHMMSS, with an 'x' at the end.
    boolean gotString = false;
    char inChar;
    byte temp1, temp2;
    char inString[20];
    
    byte j=0;
    while (!gotString) {
        if (Serial.available()) {
            inChar = Serial.read();
            inString[j] = inChar;
            j += 1;
            if (inChar == 'x') {
                gotString = true;
            }
        }
    }
    Serial.println(inString);
    // Read year first
    temp1 = (byte)inString[0] -48;
    temp2 = (byte)inString[1] -48;
    year = temp1*10 + temp2;
    // now month
    temp1 = (byte)inString[2] -48;
    temp2 = (byte)inString[3] -48;
    month = temp1*10 + temp2;
    // now date
    temp1 = (byte)inString[4] -48;
    temp2 = (byte)inString[5] -48;
    date = temp1*10 + temp2;
    // now Day of Week
    dOW = (byte)inString[6] - 48;
    // now hour
    temp1 = (byte)inString[7] -48;
    temp2 = (byte)inString[8] -48;
    hour = temp1*10 + temp2;
    // now minute
    temp1 = (byte)inString[9] -48;
    temp2 = (byte)inString[10] -48;
    minute = temp1*10 + temp2;
    // now second
    temp1 = (byte)inString[11] -48;
    temp2 = (byte)inString[12] -48;
    second = temp1*10 + temp2;
}

String comdata ="";
const int numdata[7] = {0},mark = 0;
const int buzz = 11;




void setup() {

pinMode(blue, INPUT_PULLUP);
pinMode(green, INPUT_PULLUP);
pinMode(yellow, INPUT_PULLUP);
pinMode(white, INPUT_PULLUP);
pinMode(red, INPUT_PULLUP);
pinMode(buzz, OUTPUT);
  Wire.begin();
  Serial.begin(9600);
// set up the LCD's number of columns and rows:
  lcd.begin(16,2);
// Print a message to the LCD.
  lcd.print("  DEEZ ");
  lcd.setCursor(0,1);  //Display position
  lcd.print("        NUTZ");
   delay(2000);
  lcd.clear();   
   
  
 }

void loop() {

    
    // If something is coming in on the serial line, it's
    // a time correction so set the clock accordingly.
    if (Serial.available());
      
        getDateStuff(year, month, date, dOW, hour, minute, second, temperature);
        
        Clock.setClockMode(false);  // set to 24h
        //setClockMode(true); // set to 12h
        
        Clock.setYear(year);
        Clock.setMonth(month);
        Clock.setDate(date);
        Clock.setDoW(dOW);
        Clock.setHour(hour);
        Clock.setMinute(minute);
        Clock.setSecond(second);
}
void WriteDS3231();
  {
  Clock.setSecond(numdata[6]); 
  Clock.setMinute(numdata[5]); 
  Clock.setHour(numdata[4]);   
  Clock.setDoW(numdata[3]);    
  Clock.setDate(numdata[2]);   
  Clock.setMonth(numdata[1]);  
  Clock.setYear(numdata[0]);
 } 




   void Print_time();
   {
  
  
    Clock.getTemperature();
    lcd.setCursor(0, 0);
    lcd.print("20");  // Show 20 Century
    if (year>=10)    // Display year
      {
      lcd.print(year,DEC);
      }
      else
      {
      lcd.print("0");
      lcd.print(year,DEC);
      }
    lcd.print('-');
    }
    lcd.setCursor(5, 0);
    if (month>=10)  //Display month 
      {
      lcd.print(month,DEC);
      }
      else
      {
      lcd.print("0");
      lcd.print(month,DEC);
      }
  lcd.print('-');

  lcd.setCursor(8, 0);
    if (date>=10)  // Display date
      {
      lcd.print(date,DEC);
      }
      else
      {
      lcd.print("0");
      lcd.print(date,DEC);
      }

  lcd.setCursor(11, 0);
    switch (dOW)  // Display Week
      {
      case 1:  // When Dow is equal to 1, execute the following statement
        lcd.print("Mon");
        break;
      case 2:  // When Dow is equal to 2, execute the following statement
        lcd.print("Tue");
        break;
      case 3:
        lcd.print("Wed");
        break;
      case 4:
        lcd.print("Thu");
        break;
      case 5:
        lcd.print("Fri");
        break;
      case 6:
        lcd.print("Sat");
        break;
      case 7:
        lcd.print("Sun");
        break;
      }

  lcd.setCursor(0, 1);//Move the cursor to the second line.
    if (hour>=10)     //Display hours
      {
      lcd.print(hour,DEC);
      }
      else
      {
      lcd.print("0");
      lcd.print(hour,DEC);
      }
  lcd.print(':');

  lcd.setCursor(3, 1);
    if (minute>=10)  // Display minutes
      {
      lcd.print(minute,DEC);
      }
      else
      {
      lcd.print("0");
      lcd.print(minute,DEC);
      }
  lcd.print(':');

  lcd.setCursor(6, 1);
    if (second>=10)  //Display seconds
      {
      lcd.print(second,DEC);
      }
      else
      {
      lcd.print("0");
      lcd.print(second,DEC);
      }

      lcd.setCursor(12, 1);
      lcd.print(temperature);  // Display temperature
      lcd.write(0xdf);         // Display temperature symbol
      lcd.print("C");
      }   

      if( hour == 7 &&  (minute == 30 || minute == 35)); //Comparing the current time with the Alarm time
 
     {
     tone(buzz, 50);
     delay(50);
     noTone(buzz);
     delay(100);  
     lcd.clear();
     lcd.print("WAKE THE");
     lcd.setCursor(0,1);
     lcd.print("FUCK UP");
      delay(1000);
     }

Now keep in mind it's incomplete, but kinda feels like i gotta fix this now before continuing.

my current serial output is;

C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:129:3: error: expected unqualified-id before '{' token
   {
   ^
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:143:4: error: expected unqualified-id before '{' token
    {
    ^
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:160:5: error: 'lcd' does not name a type
     lcd.setCursor(5, 0);
     ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:161:5: error: expected unqualified-id before 'if'
     if (month>=10)  //Display month
     ^~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:165:7: error: expected unqualified-id before 'else'
       else
       ^~~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:170:3: error: 'lcd' does not name a type
   lcd.print('-');
   ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:172:3: error: 'lcd' does not name a type
   lcd.setCursor(8, 0);
   ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:173:5: error: expected unqualified-id before 'if'
     if (date>=10)  // Display date
     ^~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:177:7: error: expected unqualified-id before 'else'
       else
       ^~~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:183:3: error: 'lcd' does not name a type
   lcd.setCursor(11, 0);
   ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:184:5: error: expected unqualified-id before 'switch'
     switch (dOW)  // Display Week
     ^~~~~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:209:3: error: 'lcd' does not name a type
   lcd.setCursor(0, 1);//Move the cursor to the second line.
   ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:210:5: error: expected unqualified-id before 'if'
     if (hour>=10)     //Display hours
     ^~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:214:7: error: expected unqualified-id before 'else'
       else
       ^~~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:219:3: error: 'lcd' does not name a type
   lcd.print(':');
   ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:221:3: error: 'lcd' does not name a type
   lcd.setCursor(3, 1);
   ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:222:5: error: expected unqualified-id before 'if'
     if (minute>=10)  // Display minutes
     ^~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:226:7: error: expected unqualified-id before 'else'
       else
       ^~~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:231:3: error: 'lcd' does not name a type
   lcd.print(':');
   ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:233:3: error: 'lcd' does not name a type
   lcd.setCursor(6, 1);
   ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:234:5: error: expected unqualified-id before 'if'
     if (second>=10)  //Display seconds
     ^~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:238:7: error: expected unqualified-id before 'else'
       else
       ^~~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:244:7: error: 'lcd' does not name a type
       lcd.setCursor(12, 1);
       ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:245:7: error: 'lcd' does not name a type
       lcd.print(temperature);  // Display temperature
       ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:246:7: error: 'lcd' does not name a type
       lcd.write(0xdf);         // Display temperature symbol
       ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:247:7: error: 'lcd' does not name a type
       lcd.print("C");
       ^~~
C:\Users\Jucifer\Documents\Arduino\Alarm_clock_Project\Alarm_clock_Project.ino:248:7: error: expected declaration before '}' token
       }
       ^

exit status 1

Compilation error: expected unqualified-id before '{' token

things left to be added
set alarm time (pin red)
stop button (pin white)
value + (yellow)
value - (green)
set time/next value (blue)
and i was thinking a tilt switch for snooze or just another button.

sonofcy · March 3, 2025, 12:55am

You have about four errors. A lot is due to poor coding style. Use Tools/Auto Format for starters. CLUE code outside a function will cause errors nearby.
I spent 3 mins and got a clean compile.
BTW, when you fix the first {} error, do another Auto Format, rinse repeat.

jucifer_mourningstar · March 3, 2025, 1:27am

ha, didnt even know auto format was a thing, thanks

sonofcy · March 3, 2025, 1:39am

It isn't just a way of having a 'standard' formatting, in this case it will show you the error.

Juraj · March 3, 2025, 8:17am

for inspiration and code snippets

jucifer_mourningstar · March 20, 2025, 12:16am

decided to change my board and display, going with a RP Pico 2w and a 128x32 oled display.
Also updated the code. i can have it compile but wont go past the setup

#include <RTClib.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
Adafruit_SSD1306 display(128, 32);
RTC_DS3231 RTC;

//************Button*****************//
int P1 = 3;  // Button SET MENU'
int P2 = 1;  // Button +
int P3 = 0;  // Button -
int P4 = 2;  // SWITCH Alarm

//**************Alarm***************//
#define LED 28
#define buzzer 6

//************Variables**************//
int hourupg;
int minupg;
int yearupg;
int monthupg;
int dayupg;
int menu = 0;
int setAll = 0;


uint8_t alarmHours = 7, alarmMinutes = 30;  // Holds the current alarm time


void setup() { 
  Wire.begin();

  Serial.begin(9600);

  RTC.begin();

  pinMode(P1, INPUT_PULLUP);
  pinMode(P2, INPUT_PULLUP);
  pinMode(P3, INPUT_PULLUP);
  pinMode(P4, INPUT_PULLUP);
  Serial.begin(115200);

  pinMode(buzzer, OUTPUT);
  // Initialize the display
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // Address 0x3C for 128x32

  pinMode(LED, OUTPUT);

  // Clear the display
  display.clearDisplay();
  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(0, 1);
  display.println("lygma  deez");
  display.println("balls    nutz");
  display.display();  
  delay(1000);
  
  

  if (!RTC.lostPower()) {
    Serial.println("RTC is NOT running!");
    // Set the date and time at compile time
    RTC.adjust(DateTime(__DATE__, __TIME__));
  }
  // RTC.adjust(DateTime(__DATE__, __TIME__)); //removing "//" to adjust the time
  // The default display shows the date and time
  int menu = 0;
  
}

void loop() {

  // check if you press the SET button and increase the menu index
  if (digitalRead(P1) == LOW) {
    menu = menu + 1;
  }
  if ((digitalRead(P2) == LOW) && (digitalRead(P3) == LOW)) {
    

    DisplaySetHourAll();
    DisplaySetMinuteAll();
    display.clearDisplay();
    display.setTextColor(WHITE);
    display.setTextSize(1);
    display.setCursor(0, 1);
    display.print("ALARM");
    display.setCursor(0, 1);
    display.println(alarmHours, DEC);
    display.println(":");
    display.println(alarmMinutes, DEC);
    delay(1000);
    display.clearDisplay();
  }
  // in which subroutine should we go?
  if (menu == 0) {
    DisplayDateTime();  // void DisplayDateTime
    Alarm();            // Alarm control
  }
  if (menu == 1) {
    DisplaySetHour();
  }
  if (menu == 2) {
    DisplaySetMinute();
  }
  if (menu == 3) {
    DisplaySetYear();
  }
  if (menu == 4) {
    DisplaySetMonth();
  }
  if (menu == 5) {
    DisplaySetDay();
  }
  if (menu == 6) {
    StoreAgg();
    delay(500);
    menu = 0;
  }
  delay(100);
}

void DisplayDateTime() {
  // We show the current date and time
  DateTime now = RTC.now();
  display.setTextColor(WHITE);
  display.setTextSize(1);
  display.setCursor(0, 2);
  display.print("Hour : ");

  if (now.hour() <= 9) {
    display.print("0");
  }
  display.print(now.hour(), DEC);
  hourupg = now.hour();
  display.print(":");
  if (now.minute() <= 9) {
    display.print("0");
  }
  display.print(now.minute(), DEC);
  minupg = now.minute();
  display.print(":");
  if (now.second() <= 9) {
    display.print("0");
  }
  display.print(now.second(), DEC);


  display.setCursor(0, 1);
  display.print("Date : ");
  if (now.day() <= 9) {
    display.print("0");
  }
  display.print(now.day(), DEC);
  dayupg = now.day();
  display.print("/");
  if (now.month() <= 9) {
    display.print("0");
  }
  display.print(now.month(), DEC);
  monthupg = now.month();
  display.print("/");
  display.print(now.year(), DEC);
  yearupg = now.year();

  char DOW[][10] = { "Sunday   ", "Monday   ", "Tuesday  ", "Wednesday", "Thursday ", "Friday   ", "Saturday " };
  display.setCursor(0, 0);
  display.print("Day  : ");
  display.print(DOW[now.dayOfTheWeek()]);  // if it appears error in the code, enter the code given below
  //display.print(DOW[now.dayOfWeek()]);
}

void DisplaySetHour() {
  // time setting
  display.clearDisplay();
  DateTime now = RTC.now();
  if (digitalRead(P2) == LOW) {
    if (hourupg == 23) {
      hourupg = 0;
    } else {
      hourupg = hourupg + 1;
    }
  }
  if (digitalRead(P3) == LOW) {
    if (hourupg == 0) {
      hourupg = 23;
    } else {
      hourupg = hourupg - 1;
    }
  }
  display.setCursor(0, 0);
  display.print("Set time:");
  display.setCursor(0, 1);
  display.print(hourupg, DEC);
  delay(200);
}

void DisplaySetMinute() {
  // Setting the minutes
  display.clearDisplay();
  if (digitalRead(P2) == LOW) {
    if (minupg == 59) {
      minupg = 0;
    } else {
      minupg = minupg + 1;
    }
  }
  if (digitalRead(P3) == LOW) {
    if (minupg == 0) {
      minupg = 59;
    } else {
      minupg = minupg - 1;
    }
  }
  display.setCursor(0, 0);
  display.print("Set Minutes:");
  display.setCursor(0, 1);
  display.print(minupg, DEC);
  delay(200);
}

void DisplaySetYear() {
  // setting the year
  display.clearDisplay();
  if (digitalRead(P2) == LOW) {
    yearupg = yearupg + 1;
  }
  if (digitalRead(P3) == LOW) {
    yearupg = yearupg - 1;
  }
  display.setCursor(0, 0);
  display.print("Set Year:");
  display.setCursor(0, 1);
  display.print(yearupg, DEC);
  delay(200);
}

void DisplaySetMonth() {
  // Setting the month
  display.clearDisplay();
  if (digitalRead(P2) == LOW) {
    if (monthupg == 12) {
      monthupg = 1;
    } else {
      monthupg = monthupg + 1;
    }
  }
  if (digitalRead(P3) == LOW) {
    if (monthupg == 1) {
      monthupg = 12;
    } else {
      monthupg = monthupg - 1;
    }
  }
  display.setCursor(0, 0);
  display.print("Set Month:");
  display.setCursor(0, 1);
  display.print(monthupg, DEC);
  delay(200);
}

void DisplaySetDay() {
  // Setting the day
  display.clearDisplay();
  if (digitalRead(P2) == LOW) {
    if (dayupg == 31) {
      dayupg = 1;
    } else {
      dayupg = dayupg + 1;
    }
  }
  if (digitalRead(P3) == LOW) {
    if (dayupg == 1) {
      dayupg = 31;
    } else {
      dayupg = dayupg - 1;
    }
  }
  display.setCursor(0, 0);
  display.print("Set Day:");
  display.setCursor(0, 1);
  display.print(dayupg, DEC);
  delay(200);
}

void StoreAgg() {
  // Variable saving
  display.clearDisplay();
  display.setCursor(0, 0);
  display.print("SAVING IN");
  display.setCursor(0, 1);
  display.print("PROGRESS");
  RTC.adjust(DateTime(yearupg, monthupg, dayupg, hourupg, minupg, 0));
  delay(200);
}
void DisplaySetHourAll()  // Setting the alarm minutes
{
  while (digitalRead(P1) == HIGH) {

    display.clearDisplay();

    if (digitalRead(P2) == LOW) {
      if (alarmHours == 23) {
        alarmHours = 0;
      } else {
        alarmHours = alarmHours + 1;
      }
    }
    if (digitalRead(P3) == LOW) {
      if (alarmHours == 0) {
        alarmHours = 23;
      } else {
        alarmHours = alarmHours - 1;
      }
    }
    display.setCursor(0, 0);
    display.print("Set HOUR Alarm:");
    display.setCursor(0, 1);
    display.print(alarmHours, DEC);
    delay(200);
  }
  delay(200);
}

void DisplaySetMinuteAll()  // Setting the alarm minutes
{
  while (digitalRead(P1) == HIGH) {

    display.clearDisplay();
    if (digitalRead(P2) == LOW) {
      if (alarmMinutes == 59) {
        alarmMinutes = 0;
      } else {
        alarmMinutes = alarmMinutes + 1;
      }
    }
    if (digitalRead(P3) == LOW) {
      if (alarmMinutes == 0) {
        alarmMinutes = 59;
      } else {
        alarmMinutes = alarmMinutes - 1;
      }
    }
    display.setCursor(0, 0);
    display.print("Set MIN. Alarm:");
    display.setCursor(0, 1);
    display.print(alarmMinutes, DEC);
    delay(200);
  }
  delay(200);
}
void printAllOn() {
  display.setCursor(0, 0);
  display.print("Alarm: ");



  if (alarmHours <= 9) {
    display.print("0");
  }
  display.print(alarmHours, DEC);

  display.print(":");
  if (alarmMinutes <= 9) {
    display.print("0");
  }
  display.print(alarmMinutes, DEC);
}
void printAllOff() {
  display.setCursor(0, 1);
  display.print("Alarm: Off  ");
}
void Alarm() {
  if (digitalRead(P4) == LOW) {
    setAll = setAll + 1;
  }
  if (setAll == 0) {
    printAllOff();
    noTone(buzzer);
    digitalWrite(LED, LOW);
  }
  if (setAll == 1) {

    printAllOn();    
  
     DateTime now = RTC.now();
     if ( now.hour() == alarmHours && now.minute() == alarmMinutes )
        {
         
         DateTime now = RTC.now();
         digitalWrite(LED,HIGH);
         tone(buzzer,880); //play the note "A5" (LA5)
         delay (300);
         tone(buzzer,698); //play the note "F6" (FA5)
         
        }
    else{
         noTone (buzzer);
         digitalWrite(LED,LOW);
        }
    
    } 
  if (setAll==2)
    {
     setAll=0;
    }
    delay(200);
}

once i get this working, i d plan on using this to automate some stuff around the house (fish tank lights, turn on coffee maker....)

jucifer_mourningstar · April 5, 2025, 4:24am

figured i'd give an update.
went back to using an arduino R3.
Almost have it working, I think it's an I2C conflict but not sure what i should do to resolve it.
currently connected using 2 sets of pins, the time isnt "flowing" and characters sometimes change spaces.

here's the updated code

#include "RTClib.h"
#include <wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_W 128
#define SCREEN_H 32
#define OLED_RESET  -1 
#define SCREEN_ADDRESS 0x3C
RTC_DS3231 rtc;
DateTime now;
Adafruit_SSD1306 display(SCREEN_W, SCREEN_H, &Wire);

char daysOfTheWeek[7][12] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thrusday", "Friday", "Saturday" };

//************Variables**************//
int hourupg;
int minupg;
int yearupg;
int monthupg;
int dayupg;
int menu = 0;
int setAll = 0;

//************Button*****************//
int P1 = 12;  // Button SET MENU'
int P2 = 10;  // Button +
int P3 = 9;   // Button -
int P4 = 11;  // SWITCH Alarm

//**************Alarm***************//
#define LED 7
#define buzzer 6



uint8_t alarmHours = 7, alarmMinutes = 30;  // Holds the current alarm time

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  Wire.begin(0x3C);
  Wire.begin(0x57);
  Wire.begin(0x68);
  

  // SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;)
      ;  // Don't proceed, loop forever
  }
/*
#ifndef ATmega328
  while (!Serial)
    ;  // wait for serial port to connect. Needed for native USB
#endif
*/

  if (!rtc.begin()) {
    Serial.println("Couldn't find rtc");
    //Serial.flush();
    while (1) delay(10);
  }

  if (rtc.lostPower()) {
    Serial.println("rtc lost power, let's set the time!");
  }
}
void loop() {
  // check if you press the SET button and increase the menu index
  if (digitalRead(P1) == LOW) {
    menu = menu + 1;
  }
  if ((digitalRead(P2) == LOW) && (digitalRead(P3) == LOW)) {


    display.clearDisplay();
    display.setTextColor(WHITE);
    display.setTextSize(1);
    display.setCursor(0, 10);
    display.print("ALARM");
    display.setCursor(0, 10);
    display.println(alarmHours, DEC);
    display.println(":");
    display.println(alarmMinutes, DEC);
    //delay(0);
    display.clearDisplay();
  }
  // in which subroutine should we go?
  if (menu == 0) {
    DisplayDateTime();  // void DisplayDateTime
    Alarm();            // Alarm control
  }
  if (menu == 1) {
    DisplaySetHour();
  }
  if (menu == 2) {
    DisplaySetMinute();
  }
  if (menu == 3) {
    DisplaySetYear();
  }
  if (menu == 4) {
    DisplaySetMonth();
  }
  if (menu == 5) {
    DisplaySetDay();
  }
  if (menu == 6) {
    StoreAgg();
    delay(500);
    menu = 0;
  }
  millis();
  //delay(100);
  // put your main code here, to run repeatedly:
  // display.clearDisplay();
  //delay(0);
}



void DisplayDateTime() {
  // We show the current date and time
  DateTime now = rtc.now();
  
  
  display.clearDisplay();

  display.setTextColor(SSD1306_WHITE);
  display.setTextSize(1);
  display.print("");

  if (now.hour() <= 9) {
    display.setCursor(0, 13);
    display.print("0");
  }
  display.setCursor(5, 13);
  display.println(now.hour(), DEC);
  hourupg = now.hour();
  display.print("");
  if (now.minute() <= 9) {
    display.setCursor(30, 13);
    display.print("0");
  }
  display.setCursor(11, 13);
  display.println(now.minute(), DEC);
  minupg = now.minute();
  display.print("");
  if (now.second() <= 9) {
    display.setCursor(16, 13);
    display.print("0");
  }
  display.setCursor(22, 13);
  display.println(now.second(), DEC);

  display.setTextSize(1);
  display.setCursor(27, 0);
  display.print("");
  if (now.day() <= 9) {
    display.setCursor(32, 0);
    display.print("0");
  }
  display.setCursor(65, 0);
  display.println(now.day(), DEC);
  dayupg = now.day();
  display.print("");
  if (now.month() <= 9) {
    display.setCursor(50, 0);
    display.print("0");
  }
  display.setCursor(55, 0);
  display.println(now.month(), DEC);
  monthupg = now.month();
  display.print("");
  display.setCursor(88, 0);
  display.println(now.year(), DEC);
  yearupg = now.year();

  char DOW[][10] = { "Sunday   ", "Monday   ", "Tuesday  ", "Wednesday", "Thursday ", "Friday   ", "Saturday " };
  display.setCursor(0, 0);
  display.print("");
  display.println(DOW[now.dayOfTheWeek()]);  // if it appears error in the code, enter the code given below
  //display.print(DOW[now.dayOfWeek()]);
  display.display(); 
  /*
char buf1[20];
//Updated now.day to now.date
sprintf(buf1, "%02d:%02d:%02d %02d/%02d/%02d",  now.hour(), now.minute(), now.second(), now.day(), now.month(), now.year()); 

display.clearDisplay();
display.setCursor(0, 25);
display.setTextSize(2);
display.print(F("Date/Time: "));
Serial.println(buf1);
delay(0);
  */
}

void DisplaySetHour() {
  // time setting
  display.clearDisplay();
  DateTime now = rtc.now();
  if (digitalRead(P2) == LOW) {
    if (hourupg == 23) {
      hourupg = 0;
    } else {
      hourupg = hourupg + 1;
    }
  }
  if (digitalRead(P3) == LOW) {
    if (hourupg == 0) {
      hourupg = 23;
    } else {
      hourupg = hourupg - 1;
    }
  }
  display.setCursor(0, 0);
  display.print("Set time:");
  display.setCursor(30, 0);
  display.print(hourupg, DEC);
  delay(200);
}

void DisplaySetMinute() {
  // Setting the minutes
  display.clearDisplay();
  if (digitalRead(P2) == LOW) {
    if (minupg == 59) {
      minupg = 0;
    } else {
      minupg = minupg + 1;
    }
  }
  if (digitalRead(P3) == LOW) {
    if (minupg == 0) {
      minupg = 59;
    } else {
      minupg = minupg - 1;
    }
  }
  display.setCursor(0, 10);
  display.print("Set Minutes:");
  display.setCursor(0, 10);
  display.print(minupg, DEC);
  delay(200);
}

void DisplaySetYear() {
  // setting the year
  display.clearDisplay();
  if (digitalRead(P2) == LOW) {
    yearupg = yearupg + 1;
  }
  if (digitalRead(P3) == LOW) {
    yearupg = yearupg - 1;
  }
  display.setCursor(0, 10);
  display.print("Set Year:");
  display.setCursor(0, 10);
  display.print(yearupg, DEC);
  delay(200);
}

void DisplaySetMonth() {
  // Setting the month
  display.clearDisplay();
  if (digitalRead(P2) == LOW) {
    if (monthupg == 12) {
      monthupg = 1;
    } else {
      monthupg = monthupg + 1;
    }
  }
  if (digitalRead(P3) == LOW) {
    if (monthupg == 1) {
      monthupg = 12;
    } else {
      monthupg = monthupg - 1;
    }
  }
  display.setCursor(0, 10);
  display.print("Set Month:");
  display.setCursor(0, 10);
  display.print(monthupg, DEC);
  delay(200);
}

void DisplaySetDay() {
  // Setting the day
  display.clearDisplay();
  if (digitalRead(P2) == LOW) {
    if (dayupg == 31) {
      dayupg = 1;
    } else {
      dayupg = dayupg + 1;
    }
  }
  if (digitalRead(P3) == LOW) {
    if (dayupg == 1) {
      dayupg = 31;
    } else {
      dayupg = dayupg - 1;
    }
  }
  display.setCursor(0, 10);
  display.print("Set Day:");
  display.setCursor(0, 10);
  display.print(dayupg, DEC);
  delay(200);
}

void StoreAgg() {
  // Variable saving
  display.clearDisplay();
  display.setCursor(0, 10);
  display.print("SAVING IN");
  display.setCursor(0, 10);
  display.print("PROGRESS");
  rtc.adjust(DateTime(yearupg, monthupg, dayupg, hourupg, minupg, 0));
  delay(200);
}
void DisplaySetHourAll()  // Setting the alarm minutes
{
  while (digitalRead(P1) == HIGH) {

    display.clearDisplay();

    if (digitalRead(P2) == LOW) {
      if (alarmHours == 23) {
        alarmHours = 0;
      } else {
        alarmHours = alarmHours + 1;
      }
    }
    if (digitalRead(P3) == LOW) {
      if (alarmHours == 0) {
        alarmHours = 23;
      } else {
        alarmHours = alarmHours - 1;
      }
    }
    display.setCursor(0, 10);
    display.print("Set HOUR Alarm:");
    display.setCursor(0, 10);
    display.print(alarmHours, DEC);
    delay(200);
  }
  delay(200);
}

void DisplaySetMinuteAll()  // Setting the alarm minutes
{
  while (digitalRead(P1) == HIGH) {

    display.clearDisplay();
    if (digitalRead(P2) == LOW) {
      if (alarmMinutes == 59) {
        alarmMinutes = 0;
      } else {
        alarmMinutes = alarmMinutes + 1;
      }
    }
    if (digitalRead(P3) == LOW) {
      if (alarmMinutes == 0) {
        alarmMinutes = 59;
      } else {
        alarmMinutes = alarmMinutes - 1;
      }
    }
    display.setCursor(0, 10);
    display.print("Set MIN. Alarm:");
    display.setCursor(0, 10);
    display.print(alarmMinutes, DEC);
    delay(200);
  }
  delay(200);
}
void printAllOn() {
  display.setCursor(0, 10);
  display.print("Alarm: ");



  if (alarmHours <= 9) {
    display.print("0");
  }
  display.print(alarmHours, DEC);

  display.print(":");
  if (alarmMinutes <= 9) {
    display.print("0");
  }
  display.print(alarmMinutes, DEC);
}
void printAllOff() {
  display.setCursor(0, 10);
  display.print("Alarm: Off  ");
}
void Alarm() {
  if (digitalRead(P4) == LOW) {
    setAll = setAll + 1;
  }
  if (setAll == 0) {
    printAllOff();
    noTone(buzzer);
    digitalWrite(LED, LOW);
  }
  if (setAll == 1) {

    printAllOn();

    DateTime now = rtc.now();
    if (now.hour() == alarmHours && now.minute() == alarmMinutes) {

      DateTime now = rtc.now();
      digitalWrite(LED, HIGH);
      tone(buzzer, 880);  //play the note "A5" (LA5)
      delay(300);
      tone(buzzer, 698);  //play the note "F6" (FA5)

    } else {
      noTone(buzzer);
      digitalWrite(LED, LOW);
    }
  }
  if (setAll == 2) {
    setAll = 0;
  }
  delay(200);
}

jucifer_mourningstar · April 13, 2025, 4:55pm

I want to thank you guys for the help.

finally got it all working. the board is almost at its limit, and it was a nice learning experience.

only works as an alarm for now and i doubt il be able to use it for more than an alarm clock unless i switch to another board.

xfpd · April 13, 2025, 5:07pm

You cold store these character arrays using PROGMEM to free some memory, then display.print(); the array when needed.

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