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#include <TinyWireM.h>                  // I2C Master lib for ATTinys which use USI - comment this out to use with standard arduinos
#include <LiquidCrystal_I2C.h>          // for LCD w/ GPIO MODIFIED for the ATtiny85
#include <TinyRTClib.h>

RTC_DS1307 RTC;
#define GPIO_ADDR     0x27             // (PCA8574A A0-A2 @5V) typ. A0-A3 Gnd 0x20 / 0x38 for A - 0x27 is the address of the Digispark LCD modules.


LiquidCrystal_I2C lcd(GPIO_ADDR,16,2);  // set address & 16 chars / 2 lines


void setup(){
  
  TinyWireM.begin();                    // initialize I2C lib - comment this out to use with standard arduinos
  RTC.begin();

  if (! RTC.isrunning()) {
    // following line sets the RTC to the date & time this sketch was compiled only for the first run
    RTC.adjust(DateTime(__DATE__, __TIME__));
  }
  
  lcd.init();                           // initialize the lcd 
  lcd.backlight();                      // Print a message to the LCD.
  lcd.print("Digispark!");
  delay(1000);
}


void loop(){
DateTime now = RTC.now();

    
    lcd.home();
    
    lcd.print(now.year(), DEC);
    lcd.print('/');
    if(now.month()<10)
    lcd.print("0");
    
    lcd.print(now.month(), DEC);
    
    lcd.print('/');
    
    if(now.day()<10)
    lcd.print("0");
    
    lcd.print(now.day(), DEC);
    
    lcd.setCursor(0, 1);
    
    if(now.hour()<10)
    lcd.print("0");
    
    lcd.print(now.hour(), DEC);
    lcd.print(':');
    
    if(now.minute()<10)
    lcd.print("0");
    
    lcd.print(now.minute(), DEC);
    lcd.print(':');
    
    if(now.second()<10)
    lcd.print("0");
    
    lcd.print(now.second(), DEC);
    
    delay(1000);
}

#include <TinyWireM.h>                  // I2C Master lib for ATTinys which use USI - comment this out to use with standard arduinos
#include <DigiUSB.h>          
#include <TinyRTClib.h>

RTC_DS1307 RTC;

void setup(){
  
  TinyWireM.begin();                    // initialize I2C lib - comment this out to use with standard arduinos
  RTC.begin();

  if (! RTC.isrunning()) {
    // following line sets the RTC to the date & time this sketch was compiled only for the first run
    RTC.adjust(DateTime(__DATE__, __TIME__));
  }
  
  DigiUSB.begin();
}


void loop(){
DateTime now = RTC.now();
    DigiUSB.print(now.hour(), DEC);
    DigiUSB.print(":");
    DigiUSB.print(now.minute(), DEC);
    DigiUSB.print(':');
    DigiUSB.println(now.second(), DEC);
    DigiUSB.delay(1000);
}