Re: [lwip-users] Opinions on using lwIP for making application GPRS-chipset-agnostic

[Ajay Garg]

Thanks Sylvain for the reply .... that boosts my confidence incredibly !!!

Thanks and Regards,

Ajay

On Fri, Aug 21, 2015 at 4:21 PM, Sylvain Rochet <address@hidden> wrote:

Hi Ajay,

On Wed, Aug 19, 2015 at 02:52:57PM +0530, Ajay Garg wrote:
> Hi All.
>
> We have a scenario, wherein we are developing application to be run in an
> embedded-scenario.
> This application can be flashed on any umpteen number of micro-controllers.
>
> This application talks to external-internet-world by interfacing through
> GPRS-chipsets.
>
> These chipsets may or may-not contain embedded TCP/IP stacks within them.
> Worse, even if some of them do, each of those chipsets is likely to have a
> non-standardised set of "extended AT commands" for TCP connection
> setup/methods.
> This would mean that we would have to compile different versions of our
> application for different chipsets.
>
>
> So, we were wondering if we could use lwIP to integrate the TCP/IP stack
> within our application, and use standard "Hayes AT commands" to talk to
> GPRS-chipsets (both that contain and those that do-not-contain embedded
> TCP/IP stacks).
>
> Does our approach make sense? In particular, will this make our application
> chipset-agnostic (as far as TCP/IP connectivity is concerned)?
> (Note that I haven't delved much into lwIP's code as of now, just wanted to
> confirm if our requirement is sensible in the lwIP-ecosystem).
>
>
> We will be highly grateful for listening from you experts :) :)

As long as you are only using GPRS modem supporting 3GPP AT commands, it
should work. You'll lose some features though, like having a blinking
RF-TX LED or a network status LED on some GPIO pins of your GPRS modem.

Sylvain

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Regards,
Ajay