#include "Wire.h"
#include "LiquidCrystal_I2C.h" // (1)

LiquidCrystal_I2C LCD(39, 20, 4);  // Adress, Row, Col

/* 
Adress-Table

Adress  A0  A1  A2
 32     L   L   L
 33     H   L   L
 34     L   H   L
 35     H   H   L
 36     L   L   H
 37     H   L   H
 38     L   H   H
 39     H   H   H <- default
 
 */


void setup() 
{
  LCD.init(); 
  LCD.backlight();
}

void loop() 
{
  LCD.clear();
  char cstr[8] = "1. Zeile";
  LCD.setCursor(0, 0);  
  LCD.print(cstr);
  cstr[0] = '2';
  LCD.setCursor(0, 1);  
  LCD.print(cstr);
  cstr[0] = '3';
  LCD.setCursor(0, 2);  
  LCD.print(cstr);
  cstr[0] = '4';
  LCD.setCursor(0, 3);  
  LCD.print(cstr);
  delay(2000);
  LCD.clear();
}