#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

#include <Keypad.h>

const uint8_t ROWS = 4;
const uint8_t COLS = 3;
char keys[ROWS][COLS] = {
  { '1', '2', '3'},
  { '4', '5', '6'},
  { '7', '8', '9'},
  { '*', '0', '#'}
};
int r1=7, r2=6, r3=5, r4=4, c1=3, c2=2, c3=8; //Variables for pins
uint8_t colPins[COLS] = { c1, c2, c3 }; // Pins connected to C1, C2, C3
uint8_t rowPins[ROWS] = { r1, r2, r3, r4 }; // Pins connected to R1, R2, R3, R4

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

String inputString;
int inputInt;
void setup() {
  // Init
  lcd.init();
  lcd.backlight();
inputString.reserve(10);
  // Print something
  lcd.setCursor(0, 0);
  /*lcd.print("Hello, world!");
  lcd.setCursor(2, 1);
  lcd.print("Wokwi Online IoT");
  lcd.setCursor(5, 2);
  lcd.print("Simulator");
  lcd.setCursor(7, 3);
  lcd.print("Enjoy!");*/
  //Keypad setup
  Serial.begin(9600);
}



void loop() {
  //lcd.clear();
  char key = keypad.getKey();
  lcd.setCursor(0,0);
  lcd.print("rot= ");
  lcd.print(inputString);
  
  if (key) {
    
    //lcd.println(inputString);

    if (key >= '0' && key <= '9') {     // only act on numeric keys
      inputString += key;               // append new character to input string
    } else if (key == '#') {
      if (inputString.length() > 0) {
        inputInt = inputString.toInt(); // convert to int
        inputString = "";               // clear input
        // DO YOUR WORK HERE
        lcd.setCursor(0,1);
        //lcd.print("rot= ");
        //lcd.print(inputInt);
        //delay(3000);
        if(inputInt>30)
        {lcd.setCursor(0,1);
        lcd.print("Eingabe zu hoch");
        }
        else 
        lcd.setCursor(0,1);
        lcd.print("Eingabe erfolgt");
        }
      }
     else if (key == '*') 
     {inputInt=0;
      inputString = "";   
      lcd.clear();              // clear input
    }
  }}