#include <EEPROM.h>

//EEPROM    
const int MAX_STRING_LENGTH = 50;
const int MAX_VALUES = 12;
const int EEPROM_START_ADDRESS = 0;
struct EEPROMData {
  char value[MAX_STRING_LENGTH];
};

void saveValueToEEProm(int index, const char* value) {
  EEPROMData data;
  strncpy(data.value, value, MAX_STRING_LENGTH);


  int address = EEPROM_START_ADDRESS + index * sizeof(data);
  EEPROM.put(address, data);
}

String getConfigValue(int i) {
  String result = "";
  EEPROMData data;
  int address = EEPROM_START_ADDRESS + i * sizeof(data);
  Serial.println(address);
  EEPROM.get(address, data);

  if (strlen(data.value) > 0) {
    result  += data.value;
  }
  return result;
}


void setup() {
  // put your setup code here, to run once:

  saveValueToEEProm(3, "80");
  saveValueToEEProm(4, "60");
  saveValueToEEProm(5, "40");

}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println(getConfigValue(5));
  delay(1000);
}