#include <EEPROM.h>

#define EEPROM_SIZE 512

int eeprom_read(int addr) {
  int ret = -255;
  EEPROM.begin(EEPROM_SIZE);
  EEPROM.get(addr, ret);
  EEPROM.commit();
  EEPROM.end();
  return ret;
}

void eeprom_write(int addr, int data) {
  EEPROM.begin(EEPROM_SIZE);
  EEPROM.put(addr, data);
  EEPROM.commit();
  EEPROM.end();
}