[Moved] how to connect to gprs using SIM900D Modem?

[parshant]

Hello Friends,
Actually I have a module SIM900D Modem. I am using vodafone sim(gprs activated).
but I dont know how to connect to that gprs with my laptop. I am using hyperterminal for commands. Sending messages is achived but in gprs thing, I need your help..

Thanks & Regards,

 

[ponnus]

Re: how to connect to gprs using SIM900D Modem?

Hai,
I think this will help you.

https://www.edaboard.com/threads/208731/

 

[parshant]

Re: how to connect to gprs using SIM900D Modem?

before running the gprs, i have tried to send a message through sim900.
but after command
AT+CMGS="mob no"
a loop is running continously.
i also have done steps
1) switch off the power.
2)tried with other sim
but every time i get this running loop.
loop is:
call ready
+creg: 1
IIII
rdy
cfun: 1
+cpin: ready
+creg: 0
+creg: 2
help me to get out of this loop.

Thanks for reply

 

[parshant]

Re: how to connect to gprs using SIM900D Modem?

Sir,
if i want to send data or anythng to my mobile phone as a msg via gprs on my module, how can it'll be possible?

 

[horace1]

if you are in text mode after sending the AT+CMGS="xxxx" the modem responds with >
you then enter the message text and terminate with CTRL/Z

your data needs to be in text (character) format - using sprintf() to convert from binary to text
an alternative is to use PDU mode, have a look at
**broken link removed**

 

[parshant]

Sir,

You are telling me to send data to a cell phone in normal msg mode. But I need to send data using gprs not by simple msg. Plz give me some information about that thing.

Thanks for your priceless time.

 

[horace1]

Sir,

You are telling me to send data to a cell phone in normal msg mode. But I need to send data using gprs not by simple msg. Plz give me some information about that thing.

Thanks for your priceless time.

are you thinking of PDU mode
**broken link removed**

or using TCP or UDP

 

[parshant]

can you tell me how can I send data using TCP or UDP. I have followed below thread
https://www.edaboard.com/threads/223531/

But I am getting error during command
AT+cdnsorip=0
ERROR

after this command, according to thread, that "TCP",<IP><port no>. from where can I get this information or test server.
I have also downloaded a TCP test server. But when I put IP address and port no of that test server.
a message came as
connect fail

I am using modem SIM900D.
Plz help me out.

 

[horace1]

if you do a web search for "sim900d TCP" you will get plenty of links that should help
do you require tmodem to act as a server or use the modem as a client to access to server elsewhere on the internet?

 

[parshant]

Sir,

I know all the commands. But I am saying I dont know about this TCP. where can I get this server. all the links are giving detail as

AT+CIPSTART="TCP","X.X.X.X","XX" TCP CONNECTION ESTABLISHED
AT+CIPSEND
>HELLO DATA RECIEVED BY SERVER

But i am saying, I dont have this server. From where can I get this test server with which I can start data transfer check

- - - Updated - - -

Sir,
I have two laptops. one is connected to sim900D with vodafone sim inside and gprs activated and other is to normal airtel internet.
Is it possible that I can send data from sim900d to other laptop connected to internet. If it is possible. Please tell me how.

 

[horace1]

if you do a web search on "TCP client/server" it will give plenty of links, e.g.
https://www.codeproject.com/Articles/1415/Introduction-to-TCP-client-server-in-C

try downloading the client and server and running them on your laptop.

how is you second laptop connected to the internet? if thru a ADSL router or similar device you need the IP address provided by your ISP and you need to set up the router to forward packets received on a specified port (8001 in the above examples) to your laptop.
You then run the server on the laptop and the modem opens a TCP client to the IP address port 8001