float i = 1.0;
String text;
void setup() {

Serial.begin(9600);
}

void loop() {
  if(Serial.available()>0)
  i = (Serial.parseFloat(SKIP_ALL));
  Serial.println("Teplota: " + String (i++,1) + "°C");
  text = (Serial.readString());
  Serial.println(Serial.available());
  delay(500);

}