FTP Altervista con shield Ethernet

Ragazzi non riesco a collegarmi al mio ftp su altervista.
Uso lo sketch del playground:

/*
   FTP passive client for IDE v1.0.1 and w5100/w5200
   Posted October 2012 by SurferTim
   Modified 6 June 2015 by SurferTim
*/

#include <SD.h>
#include <SPI.h>
#include <Ethernet.h>
// comment out next line to write to SD from FTP server
#define FTPWRITE

// this must be unique
byte mac[] = { 0x90, 0xA2, 0xDA, 0x01, 0x59, 0x67 };

// change to your network settings
IPAddress ip( 192, 168, 1, 173 );
IPAddress gateway( 192, 168, 1, 254 );
IPAddress subnet( 255, 255, 255, 0 );

// change to your server
IPAddress server(138, 201, 86, 230);

EthernetClient client;
EthernetClient dclient;

char outBuf[128];
char outCount;

// change fileName to your file (8.3 format!)
char fileName[13] = "test.txt";

void setup()
{
  Serial.begin(9600);

  digitalWrite(10, HIGH);

  if (SD.begin(53) == 0)
  {
    Serial.println(F("SD init fail"));
  }

  Ethernet.begin(mac, ip, gateway, gateway, subnet);
  digitalWrite(10, HIGH);
  delay(2000);
  Serial.println(F("Ready. Press f or r"));
}

void loop()
{
  byte inChar;

  inChar = Serial.read();

  if (inChar == 'f')
  {
    if (doFTP()) Serial.println(F("FTP OK"));
    else Serial.println(F("FTP FAIL"));
  }

  if (inChar == 'r')
  {
    readSD();
  }

}

File fh;

byte doFTP()
{
#ifdef FTPWRITE
  fh = SD.open(fileName, FILE_READ);
#else
  SD.remove(fileName);
  fh = SD.open(fileName, FILE_WRITE);
#endif

  if (!fh)
  {
    Serial.println(F("SD open fail"));
    return 0;
  }

#ifndef FTPWRITE
  if (!fh.seek(0))
  {
    Serial.println(F("Rewind fail"));
    fh.close();
    return 0;
  }
#endif

  Serial.println(F("SD opened"));

  if (client.connect(server, 21)) {
    Serial.println(F("Command connected"));
  }
  else {
    fh.close();
    Serial.println(F("Command connection failed"));
    return 0;
  }

  if (!eRcv()) return 0;

  client.println(F("USER *****"));

  if (!eRcv()) return 0;

  client.println(F("PASS ****"));

  if (!eRcv()) return 0;

  client.println(F("SYST"));

  if (!eRcv()) return 0;

  client.println(F("Type I"));

  if (!eRcv()) return 0;

  client.println(F("PASV"));

  if (!eRcv()) return 0;

  char *tStr = strtok(outBuf, "(,");
  int array_pasv[6];
  for ( int i = 0; i < 6; i++) {
    tStr = strtok(NULL, "(,");
    array_pasv[i] = atoi(tStr);
    if (tStr == NULL)
    {
      Serial.println(F("Bad PASV Answer"));

    }
  }

  unsigned int hiPort, loPort;

  hiPort = array_pasv[4] << 8;
  loPort = array_pasv[5] & 255;

  Serial.print(F("Data port: "));
  hiPort = hiPort | loPort;
  Serial.println(hiPort);

  if (dclient.connect(server, hiPort)) {
    Serial.println(F("Data connected"));
  }
  else {
    Serial.println(F("Data connection failed"));
    client.stop();
    fh.close();
    return 0;
  }

#ifdef FTPWRITE
  client.print(F("STOR "));
  client.println(fileName);
#else
  client.print(F("RETR "));
  client.println(fileName);
#endif

  if (!eRcv())
  {
    dclient.stop();
    return 0;
  }

#ifdef FTPWRITE
  Serial.println(F("Writing"));

  byte clientBuf[64];
  int clientCount = 0;

  while (fh.available())
  {
    clientBuf[clientCount] = fh.read();
    clientCount++;

    if (clientCount > 63)
    {
      dclient.write(clientBuf, 64);
      clientCount = 0;
    }
  }

  if (clientCount > 0) dclient.write(clientBuf, clientCount);

#else
  while (dclient.connected())
  {
    while (dclient.available())
    {
      char c = dclient.read();
      fh.write(c);
      Serial.write(c);
    }
  }
#endif

  dclient.stop();
  Serial.println(F("Data disconnected"));

  if (!eRcv()) return 0;

  client.println(F("QUIT"));

  if (!eRcv()) return 0;

  client.stop();
  Serial.println(F("Command disconnected"));

  fh.close();
  Serial.println(F("SD closed"));
  return 1;
}

byte eRcv()
{
  byte respCode;
  byte thisByte;

  while (!client.available()) delay(1);

  respCode = client.peek();

  outCount = 0;

  while (client.available())
  {
    thisByte = client.read();
    Serial.write(thisByte);

    if (outCount < 127)
    {
      outBuf[outCount] = thisByte;
      outCount++;
      outBuf[outCount] = 0;
    }
  }

  if (respCode >= '4')
  {
    efail();
    return 0;
  }

  return 1;
}


void efail()
{
  byte thisByte = 0;

  client.println(F("QUIT"));

  while (!client.available()) delay(1);

  while (client.available())
  {
    thisByte = client.read();
    Serial.write(thisByte);
  }

  client.stop();
  Serial.println(F("Command disconnected"));
  fh.close();
  Serial.println(F("SD closed"));
}

void readSD()
{
  fh = SD.open(fileName, FILE_READ);

  if (!fh)
  {
    Serial.println(F("SD open fail"));
    return;
  }

  while (fh.available())
  {
    Serial.write(fh.read());
  }

  fh.close();
}

Il mio dubbio riguarda l’ip address del server

IPAddress server(138, 201, 86, 230);

che ho ricavato tramite “ping” visto che non è fornito direttamente.

Come hardware uso un arduino mega e la shield ethernet montata sopra.

L’errore che ho è “Command connection failed”

La scheda funziona dato che riesco a fare un’altro sketch d’esempio (quello in cui si connette a google).
Cosa posso aver sbagliato?

Che sistema operativo ha il pc? Potresti provare con filezilla,ovvero con un client ftp, ti connetti con l'ip che hai ricavato, se funziona il problema è nello sketch, altrimenti l'indirizzo ip non è corretto.

Ok, ci provo e vi aggiorno :slight_smile: