// ---------------------------------------------------------
// I2C - LCD Anzeige
// Pinning: ESP32 D22 <=> SCL I2C_LCD
//                D21 <=> SDA
//                3V3 <=> Vcc
//                GND <=> GND
// Befehle:
// oLCD.init ()
// oLCD.backlight ();
// oLCD.clear ();
// oLCD.setCursor (iSpalte,iZeile);
// oLCD.printf ("Hallo");
#include <LiquidCrystal_I2C.h>

#define Tasteroben    34
#define Tasterunten   14 
#define Tasterlinks   35 
#define Tasterrechts  12


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

LiquidCrystal_I2C oLCD (I2C_ADDR, LCD_COLUMNS, LCD_LINES);
// ---------------------------------------------------------

void setup()
{



  pinMode(Tasteroben , INPUT_PULLUP); 
  pinMode(Tasterunten , INPUT_PULLUP);
  pinMode(Tasterlinks , INPUT_PULLUP);
  pinMode(Tasterrechts , INPUT_PULLUP);


  oLCD.init();
  oLCD.backlight();  
  

}
int Zeile = 0;
int Spalte = 8;
void loop()
{
  for(;;)
  {
    oLCD.clear();
    int Tasteroben1 = digitalRead(Tasteroben);
    int Tasterunten1 = digitalRead(Tasterunten);
    int Tasterlinks1 = digitalRead(Tasterlinks);
    int Tasterrechts1 = digitalRead(Tasterrechts);

    if (Tasteroben1 == 0)
    {
      Zeile = Zeile + 1;
    }

    if (Tasterunten1 == 0)
    {
      Zeile = Zeile - 1;
    }    

    if (Tasterlinks1 == 0)
    {
      Spalte = Spalte - 1;
    } 

    if (Tasterrechts1 == 0)
    {
      Spalte = Spalte + 1;
    } 
    oLCD.setCursor (Spalte,Zeile);
    oLCD.printf ("o");

  }
}