Getting my Raspberry Pi to work with a 3G dongle was quite a mission.I’m not a total newbie, but newbie enough to add the warning: Beware – you are entering crocodile infested waters.There is a lot of procedures where complicated configuration is required.

updating procedure huawei e220-17

I’ve connected a 4 Port USB hub to the Raspi, and in this is a keyboard, mouse and off course the 3G modem (Huawei E1820).

This is a very old modem and I assumed that it would be supported.

For the 3G dial-up to work, a device link file /dev/gsmmodem is required.

Check with ls -al /dev/gsm* if the file is present – it most probably is not! Do the tests again and note the differences against the above tests.

This proves that the modem can be activated with hot plugging.

Please play around with rebooting before and after hot plugging to see the effect – this is the way I realised how to solve the problem.

I learnt a lot during the process, and the testing approach taken below aims to transfer the same knowledge to you.

During the testing process I observed the following: It is important to note that “Hot Plugging” works!

If the drivers and software is not yet present, it is installed.