ESP32 FTP Server won't keep connected

1

I’ve been trying to start a FTP Server from ESP32 following this example:

https://platformio.org/lib/show/6015/ESP32FTPServer

Im using FileZilla in Windows 10 as well in Mac OS.
In FileZilla I always get:

|Estado:     |Conectando 192.168.5.101:21...|
|---|---|
|Estado:     |Conexão estabelecida, esperando mensagem de boas-vindas...|
|Resposta: |220--- Welcome to FTP for ESP32 ---|
|Resposta: |220---   By David Paiva   ---|
|Resposta: |220 --   Version FTP-2016-01-14   --|
|Comando: |AUTH TLS|
|Resposta: |500 Syntax error|
|Comando: |AUTH SSL|
|Resposta: |530 user not found|
|Estado:     |Servidor sem segurança, não suporta FTP sobre TLS.|
|Comando: |USER base|
|Erro:         |Não foi possível ler do soquete: ECONNRESET - Conexão redefinida|
|Erro:         |Não foi possível conectar ao servidor|

Simultaneously, by ESP32’s side, I get:

Client connected!
AUTH TLS
Disconnecting client
Ftp server waiting for connection on port 21

What might be happening?

2

Now I’m testing as alternative:
https://platformio.org/lib/show/10921/ESP-FTP-Server-Lib

But again no success achieved!
In FileZilla:
|Estado: |Conectando 192.168.5.101:21…|
|—|—|
|Estado: |Conexão estabelecida, esperando mensagem de boas-vindas…|
|Estado: |Servidor sem segurança, não suporta FTP sobre TLS.|
|Estado: |O servidor não suporta caracteres que não sejam ASCII.|
|Estado: |Identificado|
|Estado: |Obtendo lista de pastas…|
|Comando: |PWD|
|Resposta: |257 / is your current directory|
|Comando: |TYPE I|
|Resposta: |200 TYPE is now 8-bit binary|
|Comando: |PASV|
|Resposta: |500 Unknown command|
|Comando: |PORT 192,168,5,119,217,224|
|Resposta: |200 PORT command successful|
|Comando: |MLSD|
|Resposta: |150 Accepted data connection|
|Resposta: |550 Can’t open directory /|
|Erro: |Falha na obtenção da lista de pastas|

In Serial Monitor:

AUTH TLS
USER: 500 Unknown command
AUTH SSL
USER: 500 Unknown command
USER base
PASS dados
PWD
TYPE I
PASV
500 Unknown command
PORT 192,168,5,119,217,224
MLSD
3

Using the peterus/ESP-FTP-Server-Lib library works, but it’s unintuitive for the FTP client because the default sketch does not populalate the / directory. When the code does

(I commented out all the SD code in my case), you have to access the sub-filesystems by their explicit paths, so e.g., /SPIFFS. With that, FileZilla shows me the contents of the SPIFFS partition that I uploaded to the microcontroller previously.

grafik
grafik1067×697 43.3 KB

And that works.

Either improve the library or file a report in Issues · peterus/ESP-FTP-Server-Lib · GitHub for the author.

4

Now it works… Thank you.

I’ve tried it first commenting out “SD” and then with both SD and SPIFFS enabled. But it shows a strange behavior and I can’t be sure whether it happens in FileZilla or in ESP32 FTP filesystem itself.

The problem is that FileZilla isn’t able to step back opened folders. I mean, for example, when /SD/Teste04 folder is opened, like this:
image

I can’t go back to /SD folder. It reports an error:
image

image

image

I guess the issue might be in ESP32 FTP itself, because FileZilla delivers “CWB /SD” command and ESP32 answers “/sd/Teste04/SD does not exist”.

The only solution I found so far is to reconnect, but with preset remote folder:
image

Any clue?

5

The FTP server implementation can definitely be better. Either do per above

or find an alternative library

6

Done.
Here you are the GitHub issue link. Maybe someone would like to follow it too.
https://github.com/peterus/ESP-FTP-Server-Lib/issues/8

Thank you.
Regards,
Ciro.

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