GET / HTTP/1.1 with cipsend returns nothing !

[litham]

at+cipsend

Hi all,

I can make connection to a server using sim300c/gprs. (I get CONNECT OK status)
But, I have some trouble.
when I want to get data from google , with at+cipsend command, I recieve nothing.

these are the commande I use

at+cipshut
SHUT OK
at+cstt="m2minternet"
OK
at+ciicr
OK
at+cifsr
10.230.44.165

at+cipstart="tcp","209.85.229.104","80"
OK

CONNECT OK
at+cipsend
> GET / HTTP/1.1
SEND OK



Also, when I use APPE to create file. it's only says send ok, and I can't find this file.

best regards, thanks

 

[GSM Man]

cipsend get

You need to include the HTTP header data: (>> indicates what you send to GSM, << indicates what GSM sends to you)

>> AT+CIPSEND - Issue Send Command
<< > - wait for module to return'>' to indicate it's ready to receive data
>> GET / HTTP/1.1 - Send data - this example is an HTTP request for the default page
>> Host: www.google.com
>> Connection: Keep-Alive
>> Accept: */*
>> Accept-Language: en-us
>>
>> CTL-Z
<< data from server returned - Server will return data here

Each of those line need a CRLF after them. You also need the "blank" line (two CRLF pairs together) to indicate the end of the header.

 

[litham]

at+cipsend get

wait wait wait, if you look to what I did: it s the same thing!

when I type <ENTER> key after cipsend I got this '>'
then I type GET/HTTP/1.1
followd by <Ctrl+z>
Is that true?

 

[GSM Man]

ใช้at+cipsend

No, they are not the same thing. You are not sending a "well formed" header, so when the Google server receives your request it is discarding it - without responding to you.

At the very least, you need to terminate the "GET/HTTP/1.1" with 2 CR/LF pairs. The blank line indicates the end-of-header. However, I would advise you to include all of the lines I showed in my previous post, or you may experience problems with some other servers.

If you don't want to keep to connection alive you can omit that line

 

[litham]

send ok at+cipsend

Thanks, GSM man the CR/LF pairs can be done with both <Ctrl+ENTER> keys.

I must type <Ctrl+ENTER> key after each line.
and it works,

My next step is to send user and pass over gprs, I try this:

220 (vsFTPd 2.0.1)                  
at+cipsend          
> USER pep.edbox103                   


SEND OK       
331 Please specify the password.                                
530 Please login with USER and PASS.                                    
at+cipsend          
> PASS pervaya              

SEND OK       
230 Login successful.  //                   
at+cipsend          
> APPE blabla.txt                 

SEND OK
500 Unknown command. // why?
at+cipsend
> mkd FFTTPP

SEND OK
257 "/FFTTPP" created // OK the directory was created. 
AT+CIPSEND
> cwd FFTTPP

SEND OK
500 Unknown command. // ??

what command do I need to create, write file and create directory ?
Thanks

Added after 2 hours 30 minutes:

I foud it, I can create file after etering passiv mode with PASV.

yep
thanks