Integrate 3G dongle with Microcontroller

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flytokhushi

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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..
 

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.
 

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.
 

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.
 
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