Question

我正试图在ESP8266的SD卡上接收位于FTP服务器上的文件（.txt文件）。我正在使用此代码，但已通过WiFi对其进行了编辑。

https://playground.arduino.cc/Code/FTP/

WiFi可以正常工作，我可以将SD卡中的文件发送到FTP服务器，但需要将其取反，这样我就可以接收位于FTP服务器上的文件。

如果我要从代码中删除此行：

// comment out next line to write to SD from FTP server
#define FTPWRITE

它应该从FTP服务器写入我的SD卡。它实际上发送了一些内容，但它在capslock中是一个空文件。我试图重命名文件，更改了文件中的文本和文件路径，但没有成功。

这是我的串行监视器在删除以下行时显示的内容：#define FTPWRITE

SD opened
Command connected
220 FileZilla Server 0.9.60 beta
331 Password required for kalenderdisplay
230 Logged on
215 UNIX emulated by FileZilla
200 Type set to I
227 Entering Passive Mode (x,x,x,x,218,99)
Data port: 55907
Data connected
150 Opening data channel for file download from server of "/Meeting.txt"
226 Successfully transferred "/Meeting.txt"
Data disconnected

这包括行时：#define FTPWRITE

SD opened
Command connected
220 FileZilla Server 0.9.60 beta
331 Password required for kalenderdisplay
230 Logged on
215 UNIX emulated by FileZilla
200 Type set to I
227 Entering Passive Mode (x,x,x,x,217,107)
Data port: 55659
Data connected
150 Opening data channel for file upload to server of "/Meeting.txt"
Writing
Data disconnected
226 Successfully transferred "/Meeting.txt"
221 Goodbye
Command disconnected
SD closed
FTP OK

那是我正在使用的代码

#include <SD.h>
#include <SPI.h>
#include <ESP8266WiFi.h>

// comment out next line to write to SD from FTP server
#define FTPWRITE

#define STASSID "xxx"
#define STAPSK  "xxx"
const char* ssid     = STASSID;
const char* password = STAPSK;

// change to your server
IPAddress server( x, x, x, x );

WiFiClient client;
WiFiClient dclient;

char outBuf[128];
char outCount;

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

File fh;

void setup()
{
  Serial.begin(115200);

  if(SD.begin(4) == 0)
  {
    Serial.println(F("SD init fail"));          
  }

  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  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();    
  }
}

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 kalenderdisplay"));

  if(!eRcv()) return 0;

  client.println(F("PASS kalenderdisplay"));

  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();
}

是我的代码还是我的FTP服务器？以及如何解决该问题？

如何使用Arduino

0 个答案: