setup wifi on rpi3

gistfile1.md

in /etc/network/interfaces:

source-directory /etc/network/interfaces.d

auto lo
iface lo inet loopback

iface eth0 inet manual

auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

allow-hotplug wlan1
iface wlan1 inet manual
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

in /etc/wpa_supplicant/wpa_supplicant.conf:

country=GB
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
    ssid="WeAreAnts"
    psk="..."
}

then set dns by adding the line

prepend domain-name-servers 8.8.8.8;

in /etc/dhcp/dhclient.conf

then systemctl daemon-reload and systemctl restart networking.service