#include <EEPROM.h>

void setup() {
  Serial.begin(9600);

  TextToEEPROM(50,10,"Ahoj...");
  TextToEEPROM(60,10,"dalsi text");

  Serial.println(TextFromEEPROM(50,10));
  Serial.println(TextFromEEPROM(60,10));

}

void loop() {}

void TextToEEPROM(int adresa, int maxVelikost, String text)
{
  for (int i = 0;i < text.length();i++)
  {
  EEPROM.write(adresa + i, (byte)text[i]);
  }
  for (int i = text.length();i < maxVelikost;i++)
  {
  EEPROM.write(adresa + i, ' ');
  }
}

String TextFromEEPROM(int adresa, int maxVelikost)
{
  String TextFromEEPROM = "";
  for (int i = 0;i < maxVelikost;i++)
  {
  char znak = (char)EEPROM.read(adresa + i);
  TextFromEEPROM = TextFromEEPROM + znak;
  }
  while (TextFromEEPROM[TextFromEEPROM.length() - 1] == ' ')
    {
      TextFromEEPROM = TextFromEEPROM.substring(0,TextFromEEPROM.length() - 1);
    }
  return  TextFromEEPROM;
}