GPRS activation

[roymtech]

hi

i have a gsm/gprs module (Wavecom made Q2686). my basic requirement is to send data from one module to another. now i am sending the data via sms using the AT commands through the microcontroller. since i have to send large amount data, the sms process is very time consuming. So i am looking for GPRS. let anyone tell me about the basic requirements and the AT command flow? please help…

thanks
Roy

[awneil]

@roymtech

since i have to send large amount data, the sms process is very time consuming.

Probably also very expensive

So i am looking for GPRS. let anyone tell me about the basic requirements

The most basic thing that you need to understand is that GPRS is a packet-based transport - that’s what the ‘P’ stands for!

I guess that the specific packet-based transport that you intend using is IP (Internet Protocol) - yes?

In that case, you will need (at least) a basic undrstanding of IP networking - this is not specific to GPRS or Sierra Wireless, so any general text will do; eg,

Connection from a specific port

I think what you’re missing is an understanding of TCP/IP networking in general - irrespective of GPRS and/or Wavecom. Take a look at this tutorial: compnetworking.about.com/od/tcpi … otocol.htm Or, indeed, any tutorial or book on TCP/IP networking

I want to send simple string using FTP

Both the link in the HTTP tutorial, and the one given above now seem to be dead. The document is currently available here: cis.temple.edu/~ingargio/old … ckets.html That link is also broken; try: burks.bton.ac.uk/burks/pcinfo/pr … insock.htm

The biggest problem with IP in the context of GPRS is that you only get a Private IP address - unless you specifically pay for a “premium” service with a Public IP address.
This means that it is not possible to communicate directly between GPRS devices; eg, see:

How could I set a destination IP address (private)?

I don’t think there’s any guarantee that these IP addresses will be able to “see” each other - even if they are on the same GPRS network? You need to either get at least one public IP address, or go through a “server” with a Public IP address. Or maybe your provider can offer some sort of VPN or other solution…?

Fastrack Supreme to HyperTerminal over network

Yes, that is the way GPRS networks usually work - in fact, it’s the way most internet connections work. If you want a fixed IP address, you will to pay for it. It’s nothing to do with Wavecom. The IP address is assigned by the GPRS network. To initiate a connection from your PC to any IP node always requires that the node has an IP address visible to the computer; Conversely, to initiate a connection from any IP to your PC node always requires that the PC has an IP address visible to tha…

and the AT command flow?

There is an Application Note which describes that.

[roymtech]

thank you