Integrate 3G dongle with Microcontroller

[flytokhushi]

Hi,

I want to integrate a Luminary microcontroller with a 3G USB dongle.

Do all USB dongles support AT commands?

If not then what is the best way to do it?

Thanks..

 

[micro-hopless]

USB? Really?

How big is your flash, several tens of megabytes ?

Before you can communicate to a 3G modem you must first have the drivers "installed". USB is not at all "plug-n-play", despite the label.

Get a 3G modem with a direct serial connection, much easier. And you might realize that you don't need all that 3G speed and get a non 3G module, they are plenty and pretty cheap.

 

[flytokhushi]

For USB stack, our microcontroller supports it well.
Support for 3G is a demand from customer's end so can't work with others.
Can any one explain the steps or packet exchange at endpoints with the driver when dongle is used on PC.

 

[micro-hopless]

See the usb_modeswitch project.

Beside USB stack you micro will need to support the following:
- drivers required by the modem, there are many variations;
- ppp dial program, or use AT commands;
- a TCP/IP stack, modem only handles the link layer;

Best use a micro which can run embedded linux.

Oh, and the actual USB communication is described in standards, see google.