GPRS connectivity

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jagrut911

Joined: 20 Aug 2009
Posts: 12
Location: Ahmedabad

21 Aug 2009 11:57 what is gprs connectivity?

Hello all,

I m implementing GPRS connectivity. And i want to send an email to the pc through GPRS. but i dont know that how many connections possible i.e. how many pc's can be connected through GPRS ???

So can any one help me out in this matter??

Thanks in advance...[/b]

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mpch_elec

Joined: 22 Jul 2009
Posts: 24
Location: Tehran,Iran

22 Aug 2009 8:17 good gprs connectivity

jagrut911 wrote:

what is your gPRS module?
You must formatetd your data with TCP/UDP Protocols...

jagrut911

Joined: 20 Aug 2009
Posts: 12
Location: Ahmedabad

22 Aug 2009 10:34 gprs with server pc

I m using SIMCOM_SIM300 GSM modem with facility of GPRS facility..

Actually i made a mistake to ask a question..
i want to connect so many GPRS modules to the server PC...
thats why i wanna know that is it possible to connect more than one GPRS modules to a single PC??

GSM Man

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

22 Aug 2009 15:49 real time connectivity through gprs

Quote:

...it possible to connect more than one GPRS modules to a single PC

You need one serial port for each module.[/quote]

jagrut911

Joined: 20 Aug 2009
Posts: 12
Location: Ahmedabad

24 Aug 2009 4:45 gprs connectivity

thanks for your reply..

but still one more thing i want to know that..
Can i send same email to all the PC simultaneously through GPRS...???
If it is then can u please explain me in brief how does it??

GSM Man

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

24 Aug 2009 14:52 gprs connectivity

If you use the SMTP protocol to send the Emails, you can send the Email to multiple recipients.

jagrut911

Joined: 20 Aug 2009
Posts: 12
Location: Ahmedabad

25 Aug 2009 6:58 Re: GPRS connectivity

okay fine..
but is it possible for the vice versa situation...
means i have one pc connected through the GPRS module at one place, same at second place and so on... and they all want to send an email to the server pc which is at the headquarter..
so will server pc received all the mail from other pcs simultaneously??

GSM Man

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

25 Aug 2009 12:59 GPRS connectivity

The server PC will receive all of the Emails, but there is no guarantee that it will receive them all at the same time.

jagrut911

Joined: 20 Aug 2009
Posts: 12
Location: Ahmedabad

26 Aug 2009 6:05 Re: GPRS connectivity

hummm... i have the same doubt...
and by the way how much time it will take to receive, say 2000, mails??
is there any other option to achieve good speed??

jagrut911

Joined: 20 Aug 2009
Posts: 12
Location: Ahmedabad

27 Aug 2009 7:04 Re: GPRS connectivity

can u tell me every sim300 module have a facility of gprs and TCP/IP??

if not then suggest me some name of the modems which have this kind of facilities.. which r quite cheap also..

thanks...

GSM Man

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

27 Aug 2009 14:25 GPRS connectivity

Yes, the SIM300 supports GPRS and includes a TCP/IP stack

eziggurat

Joined: 15 Feb 2002
Posts: 226
Helped: 9

29 Aug 2009 15:13 Re: GPRS connectivity

The speed and bandwidth will depend on your provider and also whether it is peak times. It will receive the 2000 emails but it very unlikely it will be received at the same time.

jagrut911

Joined: 20 Aug 2009
Posts: 12
Location: Ahmedabad

03 Sep 2009 12:59 Re: GPRS connectivity

okay fine..

now i m going to connect the GPRS module to the pc for testing..
but i m quite confused about the port value.. From where i have to take the port value..
Is there any AT commands to turn on the GPRS connectivity??
i tried the command AT+CGATT=1 and AT+CGACT=1,1 but it wont turn it on..

what is the role of PDP context in this matter?? when shoult it be attach and deattach?

please tell me some AT commands for the same..

Thanks...

GSM Man

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

03 Sep 2009 14:39 Re: GPRS connectivity

There's a FAQ on this web site http://www.madeeasykits.com/Faqs.asp that shows you how to make a GPSR conneciton and send an HTTP request.

jagrut911

Joined: 20 Aug 2009
Posts: 12
Location: Ahmedabad

08 Sep 2009 7:54 Re: GPRS connectivity

Hey can anybody tell me What is the use of TCP/IP stack in GPRS/GSM modem??
Is it needed for the E.-mail?
i dont have any idea why it is used and when it is needed in the GPRS/GSM modem?

please help me...

GSM Man

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

08 Sep 2009 13:45 Re: GPRS connectivity

The TCP/IP stack is used to connect to a computer on the Internet. Some of the things you can use it for:
- Send data to a Web Server
- Retreive data from a Web Server
- Act as a web server and exchange data with a web client
- Send Email
- Retreive Email
- Retreive time from a Time Server
- Send SMS and MMS messages

codewiz

Joined: 14 Sep 2008
Posts: 75

11 Sep 2009 22:21 GPRS connectivity

Please, GSM Man, I'm studing the j60 series chips from microchip. Can you tell me the need for the TCP/IP stack and how do I use it to connect the chip to the internet. Any tutorial material for easy understanding of practical embedded ethernet will be appreciated. Thanks

GSM Man

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

11 Sep 2009 23:42 Re: GPRS connectivity

codewiz wrote:

Please, GSM Man, I'm studing the j60 series chips from microchip. Can you tell me the need for the TCP/IP stack and how do I use it to connect the chip to the internet.Any tutorial material for easy understanding of practical embedded ethernet will be appreciated.

In a nutshell, the TCP/IP stack is the code that manages the interface between your applicaiton and various services on the Internet.

Microchip has a lot of information on their website including app notes and tutorials. You should check out their "Ethernet Solutions Design Center" at:
http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2505¶m=en535724

However, your previous posts mentioned the TCP/IP stack in the GSM modem. If you are using a GSM/GPRS modem, you don't need a seperate stack - use a modem that has a stack built in. The Microchip stack is only for an Ethernet or WiFi interface.

jagrut911

Joined: 20 Aug 2009
Posts: 12
Location: Ahmedabad

23 Oct 2009 6:49 Re: GPRS connectivity

Hello all,

I have GSM modem, but i couldn't find in that modem whether GPRS facility is available or not?

i have checked through some AT commands, i found that gprs is available.
i used the command AT+CGATT? and it gives me a +ve response with 1.
it also gives me the class of GPRS as "B".

so finally i conclude that there is a gprs facility in my modem but i couldn't find whether TCP/IP stack is supported or not?

so can anybody tell me how i can know whether TCP/IP stack available in my modem or not through AT commands?

and also mention my procedure to find gprs facility is corret or not?

Thanks...