I got it working! I am using a TP-Link Model TL-WN725N, V2.1. I ran into the same problems as above, using my old WEP wifi router, but then I found this blog: https://jeffskinnerbox.wordpress.com/2012/11/05/wifi-support-on-raspberry-pi/ The /etc/network/interfaces file that works is: # The loopback ...