#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define DS1307_ADDRESS 0x68

LiquidCrystal_I2C lcd(0x27, 20, 2); // set the LCD address to 0x27 for a 16 chars and 2 line display

int count = 0, last_count = -1;

void setup() {
  Serial.begin(115200);
  Serial.println("Hello");

  Wire.begin();

  lcd.init();
  lcd.backlight();
  //lcd.print("Serial counter Example");
  delay(1000);
}

void loop() {
  Wire.beginTransmission(DS1307_ADDRESS);
  Wire.write(0);
  Wire.endTransmission();
  if (Wire.requestFrom(DS1307_ADDRESS, 7) == 7) {
    /*Serial.print(bcdToDec(Wire.read()));
    Serial.print(" seconds, ");
    Serial.print(bcdToDec(Wire.read()));
    Serial.print(" minutes, ");
    Serial.print(bcdToDec(Wire.read()));
    Serial.print(" hours, ");
    Serial.print(bcdToDec(Wire.read()));
    Serial.print(" day of week, ");
    Serial.print(bcdToDec(Wire.read()));
    Serial.print(" day, ");
    Serial.print(bcdToDec(Wire.read()));
    Serial.print(" month, ");
    Serial.print(bcdToDec(Wire.read())+2000);
    Serial.println(" year");*/

    lcd.setCursor(0,0);
    lcd.print("Seconds:");
    lcd.print(bcdToDec(Wire.read()));
    lcd.setCursor(0,1);
    lcd.print("Minutes:");
    lcd.print(bcdToDec(Wire.read()));
    lcd.setCursor(0,2);
    lcd.println("Hours ");
    lcd.print(bcdToDec(Wire.read()));
    lcd.print("");
    lcd.println();

    /*lcd.print(bcdToDec(Wire.read()));
    lcd.print(" day of week, ");
    lcd.print(bcdToDec(Wire.read()));
    lcd.print(" day, ");
    lcd.print(bcdToDec(Wire.read()));
    lcd.print(" month, ");
    lcd.print(bcdToDec(Wire.read())+2000);
    lcd.println(" year");*/
  }
  else {
    Serial.println(F("Failed to get RTC date and time"));
  };
  delay(1000);
}

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