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

const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
//define the cymbols on the buttons of the keypads
char hexaKeys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {12, 11, 10, 9}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {8, 7, 6, 5}; //connect to the column pinouts of the keypad

//initialize an instance of class NewKeypad
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 

LiquidCrystal_I2C lcd(0x27, 16, 2);
byte data_count = 9;

void setup(){
  Serial.begin(9600);
  lcd.init();   
  lcd.backlight(); 
  lcd.setCursor(0,0);
  String data   = String ("Target = ");
  lcd.print(data);
}
  
void loop(){
  char customKey = customKeypad.getKey();
  lcd.setCursor(0, 0);
  String data   = String ("Target = ");
  lcd.print(data);
  
    if (customKey){
    Serial.println(customKey);

    lcd.setCursor(data_count, 0);
    lcd.print(customKey);
    data_count++;

    // lcd.setCursor(0,1);
    // String data2  = String ("Plastik = ") + String (counter);
    // lcd.print(data2);
  }

  if (customKey == 'A'){
    lcd.clear();
    data_count = 9;
  }
  
}