       serialReadPos = 0;
       return 1;
     }
+    return 0;
   }
   //put the char into the buffer
   serialReadBuf[serialReadPos] = c;

  Serial.print("[");
  Serial.print(line);
  Serial.print("] ");
    
  if( line.equalsIgnoreCase( "?" ) ){
    Serial.println( "OK, available commands: q, enausb, disusb, ena3_3v, dis3_3v, ena5v, dis5v" );
    
  }else if( line.equalsIgnoreCase( "q" ) ){
    Serial.print( "OK, " );
    s = "5V:";

  pinMode(16, OUTPUT); //Green Status LED
  pinMode(15, INPUT_PULLUP ); //Always ON/USB Controlled switch

  Serial.begin(9600, SERIAL_8N1 );

  Set5V(false);
  Set3_3V(false);
