I have a new idea, how about using a 3G USB modem? Does anybody tried it
already?

How does the modem appears to the host? If it is compliant with an USB
CDC device it would be possible to use it in an embedded system.


Best regards,

Isaac




Em 16/04/2013 16:12, Isaac Marino Bavaresco escreveu:
> Em 16/4/2013 13:52, Harold Hallikainen escreveu:
>>> Does anybody have experience in this area? What are the cheapest cell
>>> phone that support GPRS tethering? Do exist any modern cell phone model=
s
>>> that support RS-232 yet? If not, will the cell phone work as an USB CDC
>>> device when connected to a PIC32 or ARM Cortex-M3 USB port?
>> I have not done it, but it SEEMS like you should be able to get IP
>> connectivity through USB and Bluetooth. I've used laptops to connect to
>> the Internet through cellphones using both methods.
>>
>> Harold
>
> I don't need 3G access, just GPRS.
> Bluetooth is not a good option because it is one more module to add to
> the board (price-wise) and because the cell phone will be inside the
> equipment's case (why to emit radiation and be susceptible to
> interference without necessity?).
>
> That leaves USB. The only problem is that most cell-phones require the
> installation of a software dialer in the computer and in my case it will
> be a microcontroller.
> Does exist some cell-phone that supply a simple interface via USB, like
> to old ones with a serial port?
>
>
> Best regards,
>
> Isaac
>

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