Hi, for the usb programming experts it would be realy nice for mbed to comunicate with a 3g usb dongle.

For example a popular usb 3g is huawei e220 that can be used in routers with usb port to give 3G/UMTS acess. (I have a fonera 2 n).

Is the configuration for the usb communication easy? So that mbed could send AT commands to the dongle

Best regards

What a great idea, anyone done this before?

You would need to implement a CDC/ACM USB device class driver. Doable but not trivial.

I'm using a RS232 modem to do SMS communications from my mBed.

Unfortunately USB is now taking over so its imperative that a proper USB stack is implemented to be able to control things like this. I look forward to the arrival of this functionality but I somehow think we will see it commercially before anyone release it for free.

You might want to do  search

nxp, usb, cdc and you will find a lot of information on USB CDC stacks

for NXP processors eg: http://knowledgebase.nxp.com/showthread.php?t=286

What about this library?

http://mbed.org/users/donatien/programs/UMTSStickNetIf/

http://mbed.org/cookbook/Networking-Stack-Releases

I was just looking at doing the same thing using my verizon pantech usb modem...  I started here.. http://finch.am/projects/arduinogsm/

In windows, I see the device has three comm ports..

PANTECH UMW190 Connection Port(COM8)

PANTECH UMW190 Diagnostic Port(COM6)

PANTECH UMW190 NMEA Port(COM7)

I've connected to the Connection Port using a terminal program at 57600baud and get an OK response with an AT command... But I cannot seem to actually get it to respond to anything but ERROR with any AT commands I issue (such as AT+CSQ)...  Still looking into that..

EDIT:

Ok, so I didn't notice windows stuck a modem device on com5...  So I was able to issue AT commands via that com port... Not sure how that translates to the MBED yet, but I am guessing there's going to be some interesting problems... I used portmon for windows to do some sniffing on how the verizon access manager talks to the modem but was unable to pull any intelligible information from it...  =/