This message was edited by weicco at 2003-5-13 2:52:22

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Hi.

I'm working on a project which has to establish GPRS connection with AT commands. Software is supposed to run on Windows CE.

I have written a small terminal software and I can send AT commands to modem and read responses. Everything works fine, I can make calls and send SMS stuff and things like that.

But now I'm facing problems with GPRS. I've managed to set correct settings with AT+CGDCONT message and I can set up somekind of connection with AT+CGATT & AT+CGDATA. I get an IP address from the other end and things look to go well. But when I open browser (IE) it gives me an error that it can't make connection to server. I go to Internet Options, set connection to GPRS, try again and still not connection to server. Any ideas what goes wrong in here or am I totally missing something?

Then I tried another approach (or I don't know if this really is another approach, I'm not really familiar with GPRS). I send ATD*99# to modem (*99# is the number I'm supposed to call). Modem tells me CONNECT 57600 and gives unsoliticied result code +CREG: 1,1 (connection to home network). But after few seconds I get NO CARRIER message. Is there something I must send after CONNECT xxx part or what?

Any answers and ideas are greatly appreciated.

EDIT: I did some research and came to conclusion that I need to alter routing table. Am I right?

You can realize Sending SMS and Making Call. I am doing the same thing and meet some difficult. Can you help me to solve this problem? I am using the Pocket PC2002 to develop a program to make call through the GSM/CDMA modem. My problem is the serial port problem. When I send the AT command to the serial port,I cannot get the reply. No response from the serial port. But from the super terminal, I can operate the GSM/CDMA modem correctly. How I can solve this problem?
Thanks a lot

Hmm.. Are you sure you are using the port and rigth port settings? My code just opens port to COM5: with CreateFile, calls SetCommState and SetCommTimeouts, starts thread that calls SetCommMask with EV_RXCHAR flag and reads port with ReadFile. If that goes well I just send "AT\r" (with WriteFile) to modem and it answers with "\r\nOK\r\n" string. Did you remember to add \r at the end of your command string?

: You can realize Sending SMS and Making Call. I am doing the same thing and meet some difficult. Can you help me to solve this problem? I am using the Pocket PC2002 to develop a program to make call through the GSM/CDMA modem. My problem is the serial port problem. When I send the AT command to the serial port,I cannot get the reply. No response from the serial port. But from the super terminal, I can operate the GSM/CDMA modem correctly. How I can solve this problem?
: Thanks a lot
:
:
:

1) You need link your COM5 serial port device driver to Microsoft RAS service
2) uses RAS to dial up the remote server in the Internet
e.g.
RasEnumConnections (...)
RasHangUp (...)
// Try to establish a RAS connection.
if ((dwError = RasDial (
NULL, // Extension is not supported in Windows CE
NULL, // Phone book is in the registry
&RasDialParams, // RAS configuration for the connection
0xFFFFFFFF, // Must use this value for Windows CE
hDlgWnd, // Window receives the notification message
&hRasConn)) != 0) // Connection handle

Dear Developers

I am developing application in similar area. Could you send me sample application will be great help to me? Thanks

give your email where i can send samples
thank u

: give your email where i can send samples
: thank u
:
Hi,I saw your writings and recently I am also workıng on GPRS same sort of thing. I wonder do anyone has a sample code on establıshıng GPRS connection. If so here is my mailing adress:onur_yuce98@yahoo.de
Thanks a lot!

please send me rammuru@hotmail.com. Million thanks for your help

Thanks and best regards
Muru