This message was posted on behalf of Intel Corporation
Thanks for your interest in the Intel Joule Platform.
Using the Reference Operating System, it is performed using Connman, which is a connection manager daemon that lets you to manage network connections over WiFi. Moreover, using Ubuntu is out of our support scope and I’d suggest you to contact Ubuntu support: https://developer.ubuntu.com/en/snappy/start/intel-joule/, since they can provide you a more accurate answer about that.
Additionally, you can take a look at Connecting to new Wifi network that I think you can find useful information.
Hope this information helps.