const int PIN_LED = 23;
const int PIN_RELAY_IN = 14;

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

  pinMode(PIN_LED, OUTPUT);
  pinMode(PIN_RELAY_IN, OUTPUT);
  
}

void loop() {

  if(Serial.available()){
    String cmd = "";
    while(Serial.available()){
      cmd += (char)Serial.read();
     
      if(cmd == "LUZ_ON"){
        digitalWrite(PIN_LED, HIGH);
        digitalWrite(PIN_RELAY_IN, HIGH);
      }
      else if(cmd == "LUZ_OFF"){
        digitalWrite(PIN_LED, LOW);
        digitalWrite(PIN_RELAY_IN, LOW);
      }
    }
  }
  delay(100);

}