#include <EEPROM>
struct settings {
  int brightness;
  int float multiplier;
  char label[10]
};
settings config;
void setup(){
  Serial.begin(9600);
  EEPROM.get(0,config);
  Serial.println("Текущие настройки:");
  Serial.println(config.brightness);
  Serial.println(config.multiplier);
  Serial.println(config.label);
  
  config.brightness = 200;
  config.multiplier = 2.5;
  strcpy(config.label,"Device");

  EEPROM.put(0,config)
}

void loop(){
}