Unfortunately I can't get it to work at all.
root@nanopiair:~# ifup wlan0
Internet Systems Consortium DHCP Client 4.3.3
Copyright 2004-2015 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Cannot find device "wlan0"
Error getting hardware address for "wlan0": No such device