#include <Keypad.h>
#include <LiquidCrystal_I2C.h>
#include "RTClib.h"

LiquidCrystal_I2C lcd(0x27, 16, 2);
RTC_DS1307 rtc;

char key;
int keylimit = 0;
int LCDRow = 0;

const byte ROWS = 4;//keypad
const byte COLS = 4;
char keys [ROWS] [COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

byte rowPins[ROWS] = {13, 12, 11, 10};//keypad
byte colPins[COLS] = {9, 8, 7, 6};
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void time(){
  DateTime now = rtc.now();//print time
  lcd.setCursor(0, 0);
  lcd.print("Time: ");
  
  if (now.hour() < 10) {
    lcd.print("0"); // Add a leading zero if the hour value is less than 10
  }
  lcd.print(now.hour(), DEC);
  lcd.print(":");
  
  if (now.minute() < 10) {
    lcd.print("0"); // Add a leading zero if the minute value is less than 10
  }
  lcd.print(now.minute(), DEC);
  
  //delay(5000); // Wait for 1 second before updating the display
  //return;
}

void setup(){
  Serial.begin(115200);
  lcd.begin(16,2);
  lcd.init();//lcd
  lcd.backlight();

  rtc.begin(); // Initialize the RTC module
}
void loop(){

  time();//call void time(26)

  key =keypad.getKey();
  lcd.setCursor(LCDRow, 1);
    
  if(key){
    lcd.print(key);
    lcd.setCursor(++LCDRow, 1);
    keylimit++;
  }
  
  if (keylimit == 4){
    lcd.clear();
    LCDRow = 0;
    keylimit = 0;
  }

}