#include <LiquidCrystal.h>
#include <Keypad.h>

const int rs=A1, en=A0, d4=A5, d5=A4, d6=A3, d7=A2;
LiquidCrystal lcd (rs, en, d4, d5, d6, d7);

const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

void setup() {
  // put your setup code here, to run once:
  lcd.begin(20,4);
  lcd.write("hallo");
  delay(500);
  lcd.clear();
  lcd.setCursor(2,0);
  lcd.write("A) eins");
  lcd.setCursor(11,0);
  lcd.write("B) zwei");
  lcd.setCursor(2,1);
  lcd.write("C) drei");
  lcd.setCursor(11,1);
  lcd.write("D) vier");
}

void loop() {
  // put your main code here, to run repeatedly:
  lcd.setCursor(2,4);

  
  char key = keypad.getKey();
  if (key != NO_KEY) {
    lcd.write(key);
  }
}