how to establish data call ??

[hjahshan]

i want to send at command from pic to the GSM modem for establish data call .
what command i need to establish the data call over GPRS??
and if any one work in this subject ,i ask him to provide me the code for this service.
thanks alot

[Ioannis]

It is not that simple.

You need to setup the GPRS modem according to its specific AT commands. Either on a terminal or through your PIC controller.

Then you have to open a "channel" to a Static IP address since the Mobile Network ususally provides Dynamic IPs.

Because I founded a bit difficult, I preffered the solution of a ready GPRS bridge to Serial: the WirelessCOM from Teltonika (www.teltonika.com).

You only have to set up easily through a Terminal and then whenever you write even a single byte on the serial port, it establishes automatically a connection to the programmed IP and sends the data. Like Serial to serial communication.

Ioannis

[hjahshan]

thanks for replay
u have code for that service ??
and how this service work ???
i try to do some code
but the result always no carrier

[hjahshan]

no one know the at command for this service ??

[Ioannis]

I think I told you that it is totally dependant on the model of your device.

Read your device manual or data sheet and see what commands it needs.

Ioannis

[Telemark]

Hi Ioannis,

The Telonika WirelessCom sounds ideal for an application I have in mind. I Just skimmed through the manual for it and found it a bit sketchy in parts. I assume that if you have the static IP address for your internet-connected PC then the rest is straightforward. Did you find any traps in configuring the unit?

Thanks

John

[financecatalyst]

It is not that simple.

You need to setup the GPRS modem according to its specific AT commands. Either on a terminal or through your PIC controller.

Then you have to open a "channel" to a Static IP address since the Mobile Network ususally provides Dynamic IPs.

Because I founded a bit difficult, I preffered the solution of a ready GPRS bridge to Serial: the WirelessCOM from Teltonika (www.teltonika.com).

You only have to set up easily through a Terminal and then whenever you write even a single byte on the serial port, it establishes automatically a connection to the programmed IP and sends the data. Like Serial to serial communication.

Ioannis

Hi, it a relevant topic to what I am doing so I felt it would be right to have an opinion from someone on this topic. My project is to develop a tracking system. Everything is under control as far as AT commands are concerned and gprs modem is concerned (sim300 I am using).
I have to guide our software developer to develop a server which can accept the data. I am not very expert when it comes to computers, electronics is mainly my field. I do not know how to explain him and what he needs to develop. I told him the process that through gprs my modem will get internet, and will connect to your (PC) server and send the data. I will need a port number, and a static IP.
His question is that TCP/IP is different, gprs data packet is a different matter. He asks if I need socket programming which I dont have any clue about what he means.
Can you please advise me, what in terms of server, needs to be developed in order to get the data from GPRS. Please mention details as to what software if any it should be made in like C, Java, Winsock etc, what data type should the software expect and any sort of relevant info which is helpful.

The Bottom Line here is that what should be the relevant information I should give him so he can make something which can accept data from my modem through gprs connection. Just for info, my modem has built in TCP/IP stack (if that helps).
Thanks