[Unit]
Description=WPA supplicant for %i
Requires=sys-subsystem-net-devices-%i.device
After=sys-subsystem-net-devices-%i.device

[Service]
ExecStart=/sbin/wpa_supplicant -i%i -c/etc/wpa_supplicant/wpa_supplicant.conf

[Install]
WantedBy=multi-user.target