Taken from Setting up a Bridged Wireless Access Point.
country_code=US interface=wlan0 bridge=br0 ssid=NIST-UAS-3.2 hw_mode=g channel=7 macaddr_acl=0 auth_algs=1 ignore_broadcast_ssid=0 wpa=2 wpa_passphrase=DroneNet wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP rsn_pairwise=CCMP
dhcpd