String sprava = "";

void setup() {

  Serial.begin(9600);
  Serial.println(" ");
}

void loop() {

while(!Serial.available()) {sprava = "";}

sprava = sstringr();

//Serial.print(sprava);

}

String sstringr() {
  //Serial.write(0x13);
  char message = 0;
  String content = "";
  byte messager = 0;

  while (Serial.available()) {
    message = Serial.read();
    messager = int(message);
    Serial.print(messager);
    Serial.print(" ");
    content += message;
  }

  if (content != "" && !Serial.available()) {
    //Serial.write(0x11);
    //Serial.println(" ");
    return content;
  }
}