Problema di caricamento sulla scheda

Quando carico lo sketch :

const int motore_1=3;
const int motore_2=4;
const int motore_3=8;
const int motore_4=9;
const int enable1=10;
const int enable2=11;
const int led=7;
void setup() {
  pinMode(7,OUTPUT);
  pinMode(3,OUTPUT);
  pinMode(4,OUTPUT);
  pinMode(8,OUTPUT);
  pinMode(9,OUTPUT);
  pinMode(10,OUTPUT);
  pinMode(11,OUTPUT);
  digitalWrite(10,HIGH);
  digitalWrite(11,HIGH);
 
  Serial.begin(9600);
  
  }
void loop(){
   char c= Serial.read();
  if (c=='w'){
    digitalWrite(3,HIGH);
    digitalWrite(4,LOW);
    digitalWrite(8,HIGH);
    digitalWrite(9,LOW);
  }
  
  if (c=='s'){
    digitalWrite(3,LOW);
    digitalWrite(4,HIGH);
    digitalWrite(8,LOW);
    digitalWrite(9,HIGH);

  }

if (c=='d'){
    digitalWrite(3,LOW);
    digitalWrite(4,HIGH);
   }
   if (c=='a'){
    digitalWrite(8,LOW);
    digitalWrite(9,HIGH);
   }
}

su arduino mi da il seguente errore:

Arduino:1.6.7 (Windows 7), Scheda:"Arduino/Genuino Uno"

Lo sketch usa 2.224 byte (6%) dello spazio disponibile per i programmi. Il massimo è 32.256 byte.
Le variabili globali usano 182 byte (8%) di memoria dinamica, lasciando altri 1.866 byte liberi per le variabili locali. Il massimo è 2.048 byte.
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x29
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x29
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x29
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x29
avrdude: stk500_recv(): programmer is not responding
Problema di caricamento sulla scheda. Guarda http://www.arduino.cc/en/Guide/Troubleshooting#upload per suggerimenti
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x29
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x29
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x29
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x29
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x29
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x29

forse è un problema hardware....

ERA LA PORTA CHE OGNI TANTO DAVA DIFETTI
Scusate per l'inutile post

La porta del bagno o quello della cucina? :smiley: :smiley:
Siamo curiosi, quale porta.
Ciao Uwe