Arduino Alarm | DS3231 RTC Module, 128x32 I2C OLED Display, Push Button, LED, Buzzer | Example Code

Arduino Alarm | DS3231 RTC Module, 128x32 I2C OLED Display, Push Button, LED, Buzzer | Example Code
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Code : code is on the comment below.
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#include #include #include #include #include // Include the pitches library for note constants RTC_DS3231 rtc; #define SCREEN_WIDTH 128 #define SCREEN_HEIGHT 32 #define OLED_RESET -1 #define SCREEN_ADDRESS 0x3C #define BUTTON_PIN 3 #define UP_BUTTON_PIN 4 #define DOWN_BUTTON_PIN 5 #define LED_PIN 12 #define BUZZER_PIN 11 // Buzzer pin #define LED_ON_TIME 5000 Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); enum State { NORMAL, SETTING_ALARM_DATE, SETTING_ALARM_HOUR, SETTING_ALARM_MINUTE, SETTING_ALARM_CONFIRM, MELODY_PLAYBACK }; State currentState = NORMAL; DateTime alarmTime; DateTime currentTime; unsigned long alarmActivationTime = 0; bool updateDisplay = true; // Flag to control display updates void setup() { Serial.begin(9600); pinMode(BUTTON_PIN, INPUT_PULLUP); pinMode(UP_BUTTON_PIN, INPUT_PULLUP); pinMode(DOWN_BUTTON_PIN, INPUT_PULLUP); pinMode(LED_PIN, OUTPUT); pinMode(BUZZER_PIN, OUTPUT); if (!rtc.begin()) { Serial.println("Couldn't find RTC"); while (1); } if (rtc.lostPower()) { Serial.println("RTC lost power, let's set the time!"); rtc.adjust(DateTime(F(__DATE__), F(__TIME__))); } if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) { Serial.println(F("SSD1306 allocation failed")); for (;;); } display.display(); delay(2000); display.clearDisplay(); } void loop() { currentTime = rtc.now(); handleButtons(); switch (currentState) { case NORMAL: displayNormalView(currentTime); break; case SETTING_ALARM_DATE: case SETTING_ALARM_HOUR: case SETTING_ALARM_MINUTE: case SETTING_ALARM_CONFIRM: displaySettingAlarmView(alarmTime); break; case MELODY_PLAYBACK: playSweetMelody(); break; } // Check if the alarm time has been reached if (checkAlarmTimeReached(currentTime, alarmTime)) { activateAlarm(); // Activate the alarm } else { deactivateAlarm(); // Deactivate the alarm } if (updateDisplay) { display.display(); delay(1000); display.clearDisplay(); } } void handleButtons() { static unsigned long lastButtonPressTime = 0; static const unsigned long buttonDebounceDelay = 200; unsigned long currentMillis = millis(); if (currentMillis - lastButtonPressTime >= buttonDebounceDelay) { if (digitalRead(BUTTON_PIN) == LOW) { handleEnterButtonPress(); } if (currentState == SETTING_ALARM_DATE) { handleSettingAlarmDateButtons(); } else if (currentState == SETTING_ALARM_HOUR || currentState == SETTING_ALARM_MINUTE) { handleSettingAlarmTimeButtons(); } lastButtonPressTime = currentMillis; } } void handleEnterButtonPress() { switch (currentState) { case NORMAL: currentState = SETTING_ALARM_DATE; alarmTime = currentTime; break; case SETTING_ALARM_DATE: currentState = SETTING_ALARM_HOUR; break; case SETTING_ALARM_HOUR: currentState = SETTING_ALARM_MINUTE; break; case SETTING_ALARM_MINUTE: currentState = SETTING_ALARM_CONFIRM; break; case SETTING_ALARM_CONFIRM: currentState = NORMAL; // Save the alarm time or take any necessary action break; } } void handleSettingAlarmDateButtons() { if (digitalRead(UP_BUTTON_PIN) == LOW) { incrementDate(alarmTime, 1); } if (digitalRead(DOWN_BUTTON_PIN) == LOW) { decrementDate(alarmTime, 1); } } void handleSettingAlarmTimeButtons() { if (digitalRead(UP_BUTTON_PIN) == LOW) { incrementTime(alarmTime, 1); } if (digitalRead(DOWN_BUTTON_PIN) == LOW) { decrementTime(alarmTime, 1); } } void activateAlarm() { if (currentState == NORMAL && !digitalRead(LED_PIN)) { digitalWrite(LED_PIN, HIGH); // Turn on the LED currentState = MELODY_PLAYBACK; // Switch to melody playback state updateDisplay = false; // Avoid display updates during melody playback } } void deactivateAlarm() { // Check if the LED has been on for more than 5 seconds if (digitalRead(LED_PIN) && millis() - alarmActivationTime >= LED_ON_TIME) { digitalWrite(LED_PIN, LOW); // Turn off the LED alarmActivationTime = 0; // Reset the activation time } } bool checkAlarmTimeReached(const DateTime &current, const DateTime &alarm) { // Check if all components are equal except for seconds return (current.year() == alarm.year() && current.month() == alarm.month() && current.day() == alarm.day() && current.hour() == alarm.hour() && current.minute() == alarm.minute()); } void incrementDate(DateTime &dateTime, int days) { dateTime = dateTime + TimeSpan(days, 0, 0, 0); } void decrementDate(DateTime &dateTime, int days) { dateTime = dateTime - TimeSpan(days, 0, 0, 0); } void incrementTime(DateTime &dateTime, int minutes) { if (currentState == SETTING_ALARM_HOUR) { dateTime = dateTime + TimeSpan(0, minutes, 0, 0); } else if (currentState == SETTING_ALARM_MINUTE) { dateTime = dateTime + TimeSpan(0, 0, minutes, 0); } } void decrementTime(DateTime &dateTime, int minutes) { if (currentState == SETTING_ALARM_HOUR) { dateTime = dateTime - TimeSpan(0, minutes, 0, 0); } else if (currentState == SETTING_ALARM_MINUTE) { dateTime = dateTime - TimeSpan(0, 0, minutes, 0); } } String dayStr(uint8_t day) { switch (day) { case 1: return "Sunday"; case 2: return "Monday"; case 3: return "Tuesday"; case 4: return "Wednesday"; case 5: return "Thursday"; case 6: return "Friday"; case 7: return "Saturday"; default: return "Unknown"; } } void displayNormalView(DateTime &currentTime) { display.setTextSize(1); display.setTextColor(SSD1306_WHITE); display.setCursor(0, 0); display.print(currentTime.year(), DEC); display.print('/'); display.print(currentTime.month(), DEC); display.print('/'); display.print(currentTime.day(), DEC); display.print(" "); display.print(dayStr(currentTime.dayOfTheWeek())); display.setTextSize(2); display.setCursor(0, 18); display.print(currentTime.hour(), DEC); display.print(':'); printTwoDigits(currentTime.minute()); display.print(':'); printTwoDigits(currentTime.second()); } void displaySettingAlarmView(DateTime &alarmTime) { display.setTextSize(1); display.setTextColor(SSD1306_WHITE); display.setCursor(0, 0); switch (currentState) { case SETTING_ALARM_DATE: display.print("Setting Date:"); display.setCursor(0, 20); display.print(alarmTime.year(), DEC); display.print('/'); display.print(alarmTime.month(), DEC); display.print('/'); display.print(alarmTime.day(), DEC); display.print(" "); display.print(dayStr(alarmTime.dayOfTheWeek())); break; case SETTING_ALARM_HOUR: display.print("Setting Hour:"); display.setCursor(0, 20); display.print(alarmTime.hour(), DEC); break; case SETTING_ALARM_MINUTE: display.print("Setting Minute:"); display.setCursor(0, 20); display.print(alarmTime.hour(), DEC); display.print(':'); printTwoDigits(alarmTime.minute()); break; case SETTING_ALARM_CONFIRM: display.print("Press OK to Confirm"); display.setCursor(0, 40); display.print("Alarm set for: "); display.print(alarmTime.year(), DEC); display.print('/'); display.print(alarmTime.month(), DEC); display.print('/'); display.print(alarmTime.day(), DEC); display.print(" "); display.print(dayStr(alarmTime.dayOfTheWeek())); display.print(" "); display.print(alarmTime.hour(), DEC); display.print(':'); printTwoDigits(alarmTime.minute()); display.print(':'); printTwoDigits(alarmTime.second()); break; } } void printTwoDigits(int number) { if (number < 10) { display.print("0"); } display.print(number); } void playSweetMelody() { static unsigned long melodyStartTime = 0; static int currentNoteIndex = 0; int melody[] = { NOTE_C4, NOTE_E4, NOTE_G4, NOTE_E4, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_D4, NOTE_C4, NOTE_E4, NOTE_G4, NOTE_E4, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_D4 }; int noteDurations[] = { 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4 }; // Use the same duration for each note unsigned long currentMillis = millis(); if (currentMillis - melodyStartTime >= (1000 / noteDurations[currentNoteIndex])) { tone(BUZZER_PIN, melody[currentNoteIndex]); ++currentNoteIndex; if (currentNoteIndex >= sizeof(melody) / sizeof(melody[0])) { currentState = NORMAL; // Switch back to the normal state after the melody finishes noTone(BUZZER_PIN); // Stop the buzzer updateDisplay = true; // Allow display updates after melody playback } melodyStartTime = currentMillis; // Record the start time of the next note } }