#include <Wire.h>

#define DS1307_ADDRESS 0x68 

void setup() {
  Wire.begin(); 
  Serial.begin(9600); 
}

void loop() {

  Wire.beginTransmission(DS1307_ADDRESS);
  Wire.write(0);
  Wire.endTransmission();
  
   Wire.requestFrom(DS1307_ADDRESS, 7);
  
   if (Wire.available() >= 7) {
    int second = bcdToDec(Wire.read() & 0x7F); 
    int minute = bcdToDec(Wire.read());
    int hour = bcdToDec(Wire.read() & 0x3F); 
    int dayOfWeek = bcdToDec(Wire.read());
    int dayOfMonth = bcdToDec(Wire.read());
    int month = bcdToDec(Wire.read());
    int year = bcdToDec(Wire.read());

    
    Serial.print("Time: ");
    Serial.print(dayOfMonth);
    Serial.print("/");
    Serial.print(month);
    Serial.print("/");
    Serial.print(year);
    Serial.print(" ");
    Serial.print(hour);
    Serial.print(":");
    Serial.print(minute);
    Serial.print(":");
    Serial.println(second);

    delay(1000); 
  }
}


int bcdToDec(byte val) {
  return ( (val / 16 * 10) + (val % 16) );
}