void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
}

void loop() {
  if(Serial.available()>0) {
    float pwm = Serial.parseFloat();
    Serial.println(pwm);
    Serial.flush();
    while (Serial.available()) {
        Serial.read(); // Consuma i caratteri rimanenti nel buffer
    }
  }
  
}