Hello.
I'm starting a new project and would like to know if it is possible to make an Arduino connect to Internet by using one of those USB Stick modems in which a 3G/4G sim card is inserted.
Are there any boards in the market with this functionality? Or is it possible to use something else like an USB Shield to implement something like this?
Thanks in advance.
Hopefully, you are not in the U.S., where 3G is rapidly being removed from service.
What is "an Arduino"?
Some of them can be connected to external boards handling the internet.
Some microcontrollers have built in circuitry for that.
Very unlikely indeed!
You would need an Arduino to emulate a USB "host" (very few do) and implement the driver protocol for the modem dongle (virtually impossible).
If the dongle is compatible with Linux (generic) it just might work with a Raspberry Pi. 
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