how to use STOR or APPE command with AT command ?

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litham

Joined: 17 Jun 2009
Posts: 13

26 Jun 2009 16:46 how to use STOR or APPE command with AT command ?

Hi all,
I try to send data with FTP command over AT commands,
After CONECT OK, setting remot USER and PASS. I switch into passive mode with PASV.
But
After creating file with APPE comnd, and insering lines into it, the file still empty!!
okey,
How can I use the STOR commands to send data. how to specify the local file path?

Code:

at+cipstatus
OK

STATE: IP CLOSE
at+cipshut
SHUT OK
at+cstt
OK
at+ciicr
OK
at+cifsr
10.230.83.160
at+cipstart="tcp","XXX.XXX.XXX.XXX","21"
OK
220 (vsFTPd 2.0.1)

CONNECT OK
at+cipsend
> USER *******

SEND OK
331 Please specify the password.
at+cipsend
> pass *******

SEND OK
230 Login successful.
at+cipsend
> pwd

SEND OK
257 "/"
at+cipsend
> PASV

SEND OK
227 Entering Passive Mode (XXX,XXX,XXX,XX,XX,XX)
at+cipsend
> APPE filetext

SEND OK
at+cipsend
> zehfzkjlehf
SEND OK
at+cipsend
> PASV

SEND OK
AT+CIPSEND
> APPE HOLA

SEND OK
425 Failed to establish connection.
500 Unknown command.
A425 Use PORT or PASV first.
AT+CIPSEND
> PASV

SEND OK
227 Entering Passive Mode (XXX,XXX,XXX,XXX,XXX,XXX)
AT+CIPSEND
> APPE JOLA

SEND OK
500 Unknown command.
AT+CIPSEND
> APPE ASAS

SEND OK
AT+CIPSEND
> EFHZEJFH

SEND OK
AT+CIPSEND
> ABOR

SEND OK

I find the files, but theyr are empty, any idea ?

thanks in advance
best regards

GSM Man

Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA

26 Jun 2009 20:36 Re: how to use STOR or APPE command with AT command ?

You need to establish two connections to the FTP server to transfer files - one for commands, and one for data.

After you send the 'PASV ' command the server returns an IP address and Port number as described below:

Quote:

Syntax: PASV
Tells the server to enter "passive mode". In passive mode, the server will wait for the client to establish a connection with it rather than attempting to connect to a client-specified port. The server will respond with the address of the port it is listening on, with a message like:
227 Entering Passive Mode (a1,a2,a3,a4,p1,p2)
where a1.a2.a3.a4 is the IP address and p1*256+p2 is the port number.

You need to open another connection using this IP and port and send the data over that connection.

litham

Joined: 17 Jun 2009
Posts: 13

29 Jun 2009 11:18 Re: how to use STOR or APPE command with AT command ?

Hi thanks for replay,

the problem is how to switch between data mode and commande mode? whene I use +cipccon=2 it returns ERROR

can you tell me what missed in my AT Commads?

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GSM Man

Joined: 15 Apr 2009
Posts: 357
Helped: 46
Location: New Jersey, USA

29 Jun 2009 21:24 Re: how to use STOR or APPE command with AT command ?

The problem you have is that the Sim Com modules only allow multi TCP connections when when is a client connection and one is a server connection. It does not support 2 simultaneous client connections. Regarding the "CIPCCON" command, from the manual:

Quote:

Note that there may exist two connections at one time: one connection is as client connecting with remote server, the other connection is as server connecting with remote client. Using this Command to choose through which connection data is sent.

It may work if you use the PORT command instead of the PASV command AND your provider allows your device to act as a server - accept incoming connections.