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

const byte ROWS = 3;
const byte COLS = 10; // on sütun

char keys[ROWS][COLS] = {
  {'Q','W','E','R','T','Y','U','I','O','P'},
  {'A','S','D','F','G','H','J','K','L',' '},
  {'Z','X','C','V','B','N','M',' ',' ',' '}
};

byte rowPins[ROWS] = {6, 7, 8}; 
byte colPins[COLS] = {9, 10, 11, 12, 13, 14, 15, 16, 17, 18};

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup(){
  Serial.begin(9600);
    lcd.begin(16, 2); 
  lcd.backlight(); 
}
  
void loop(){
  char key = keypad.getKey();
  if (key){
    Serial.print("Basılan Tuş: ");
    Serial.println(key);
    lcd.clear(); 
    lcd.setCursor(0, 0); 
    lcd.print("Basılan Tuş:");
    lcd.setCursor(0, 1);
    lcd.print(key);
  }
}