#include <TM1637Display.h>
#include <DS1307RTC.h>
#include <Wire.h>

// Pins for TM1637 display module
#define CLK 2
#define DIO 3

TM1637Display display(CLK, DIO);

void setup() {
    // Initialize serial communication
  Serial.begin(9600);

  // Initialize TM1637 display
  display.setBrightness(0x0a); // Set brightness level (0x00 to 0x0f)

  // Initialize variable to store time
  tmElements_t tm;

  // Check if RTC is running and read the current time
  if (RTC.read(tm)) {
    // Convert 24-hour format to 12-hour format
    int hour12 = tm.Hour % 12;
    if (hour12 == 0) {
      hour12 = 12; // 0 hours in 12-hour format is 12 AM
    }

    // Format time as a string with AM/PM indication
    char timeStr[6];
    sprintf(timeStr, "%02d%02d", hour12, tm.Minute);
    if (tm.Hour >= 12) {
      strcat(timeStr, "P");
    } else {
      strcat(timeStr, "A");
    }

    // Flashing colon toggle
    bool colonVisible = true;
    unsigned long lastColonChange = millis();

    while (true) {
      // Display time on TM1637 display
      display.showNumberDecEx(atoi(timeStr), 0b11100000 | (colonVisible ? 0x80 : 0), true);

      // Toggle colon every 500 milliseconds
      if (millis() - lastColonChange >= 500) {
        colonVisible = !colonVisible;
        lastColonChange = millis();
      }

      // Print time to serial monitor
      Serial.print("Time: ");
      Serial.print(hour12);
      Serial.print(":");
      Serial.print(tm.Minute);
      if (tm.Hour >= 12) {
        Serial.println(" PM");
      } else {
        Serial.println(" AM");
      }
      
      delay(1000); // Update every second
    }
  } else {
    Serial.println("RTC read failed!");
    // Uncomment the following line to set the time manually
    // RTC.adjust(DateTime(__DATE__, __TIME__));
  }
}

void loop() {
  tmElements_t tm;

  // Check if RTC is running and read the current time
  if (RTC.read(tm)) {
    // Convert 24-hour format to 12-hour format
    int hour12 = tm.Hour % 12;
    if (hour12 == 0) {
      hour12 = 12; // 0 hours in 12-hour format is 12 AM
    }

    // Format time as a string with AM/PM indication
    char timeStr[6];
    sprintf(timeStr, "%02d%02d", hour12, tm.Minute);
    if (tm.Hour >= 12) {
      strcat(timeStr, "P");
    } else {
      strcat(timeStr, "A");
    }

    // Flashing colon toggle
    bool colonVisible = true;
    unsigned long lastColonChange = millis();

    while (true) {
      // Display time on TM1637 display
      display.showNumberDecEx(atoi(timeStr), 0b11100000 | (colonVisible ? 0x80 : 0), true);

      // Toggle colon every 500 milliseconds
      if (millis() - lastColonChange >= 500) {
        colonVisible = !colonVisible;
        lastColonChange = millis();
      }

      // Print time to serial monitor
      Serial.print("Time: ");
      Serial.print(hour12);
      Serial.print(":");
      Serial.print(tm.Minute);
      if (tm.Hour >= 12) {
        Serial.println(" PM");
      } else {
        Serial.println(" AM");
      }
      
      delay(1000); // Update every second
    }
  } else {
    Serial.println("RTC read failed!");
    // Uncomment the following line to set the time manually
    // RTC.adjust(DateTime(__DATE__, __TIME__));
  }
}