Arduino: LCD DS1307 I2C RTC

Meterial yang diperlukan dalam tutorial kali ini adalah:

1. Arduino 2. LCD 16×2 3. I2C LCD 4. RTC DS1307 5. Library untuk I2C download disini atau disini. 6. Library untuk RTC DS1307 download disini.

Code

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

LiquidCrystal_I2C lcd(0x3F, 16, 2);
 
const unsigned int BUTTON_PIN = 7;
 
uint8_t clock[8] = {0x0,0xe,0x15,0x17,0x11,0xe,0x0};
RTC_DS1307 RTC;
 
char daysOfTheWeek[7][12] = {"Ming", "Sen", "Sel", "Rab", "Kam", "Jum", "Sab"};
char bulan[12][12] = {"Jan", "Feb", "Mar", "Apr", "Mei", "Jun", "Jul", "Agu", "Sep", "Okt", "Nov", "Des"};
 
void setup() {
  // put your setup code here, to run once:
 Wire.begin();
 RTC.begin();
 Serial.begin(9600);
 pinMode(BUTTON_PIN, INPUT);
 lcd.begin();
  //lcd.print("Belajar I2C LCD");

if (! RTC.begin()) {
    Serial.println("RTC tidak ditemukan");
    while (1);
  }

  if (! RTC.isrunning()) {
    Serial.println("RTC tidak jalan!");
    // rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
  }

 // Mengatur tanggal dan waktu sesuai dengan waktu code di compile
 //RTC.adjust(DateTime(F(__DATE__), F(__TIME__)));
}

void loop() {
 
  DateTime now = RTC.now();
    lcd.setCursor(0,0);
    lcd.print("Pukul : ");
     
    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);
  
     lcd.setCursor(0,1);
    lcd.print(daysOfTheWeek[now.dayOfTheWeek()]);
    lcd.print(",");
    lcd.print(now.day(), DEC);
    lcd.print('/');
     
    
    //lcd.print(now.month(), DEC);
    lcd.print(bulan[now.month()]);
    lcd.print('/');
    lcd.print(now.year(), DEC);
     
    
    delay(1000);
     
}