ok grazie ora ho capito
..
ho modificato il codice come hai detto tu puoi dirmi se ho fatto bene ? grazie
#include <SPI.h>
#include <Ethernet.h>
#include <Servo.h>
Servo myservo;
int pos = 0;
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,0,239);
EthernetServer server(272);
void setup()
{
 delay(1000);
 Serial.begin(9600);
 Serial.println("inizio");
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 myservo.attach(9);
 // start the Ethernet connection and the server:
 Ethernet.begin(mac, ip);
 server.begin();
}
void loop()
{
 // listen for incoming clients
 EthernetClient client = server.available();
 if (client) {
  // an http request ends with a blank line
 // boolean currentLineIsBlank = true;
  while (client.connected()) {
   if (client.available()) {
    char c = client.read();
    Serial.print("ricevuto: ");
    Serial.println(c);
    Â
    if (c == '8') {
    Serial.println("Ricevuto 8");
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     for(pos = 0; pos < 180; pos += 1)
    {                 // in steps of 1 degree
  myservo.write(pos);       // tell servo to go to position in variable 'pos'
  delay(15);           // waits 15ms for the servo to reach the position
 }
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  }
   if(c=='2') {
   for(pos = 0; pos < 180; pos += 1)
   {
  myservo.write(pos);
  delay(15);
   }
 }
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  }
 }
}
   delay(1);
  // close the connection:
  client.stop();
}