cat /etc/hostapd.conf
#
# armbian hostapd configuration example
#
# nl80211 mode
#

ssid=ARMBIAN
interface=wlx40a5efd7fcdf
hw_mode=g
channel=40
#bridge=br0
driver=nl80211

logger_syslog=0
logger_syslog_level=0
wmm_enabled=1
wpa=2
preamble=1

wpa_psk=66eb31d2b48d19ba216f2e50c6831ee11be98e2fa3a8075e30b866f4a5ccda27
wpa_passphrase=12345678
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
auth_algs=1
macaddr_acl=0

noscan=1

## IEEE 802.11n
ieee80211n=1
ht_capab=[HT40-][SHORT-GI-40][SHORT-GI-40][DSSS_CCK-40]
country_code=US
ieee80211d=1
## IEEE 802.11n

## IEEE 802.11a
hw_mode=a
## IEEE 802.11a

## IEEE 802.11ac
ieee80211ac=1
vht_capab=[MAX-MPDU-11454][SHORT-GI-80][TX-STBC-2BY1][RX-STBC-1][MAX-A-MPDU-LEN-EXP3]
vht_oper_chwidth=1
vht_oper_centr_freq_seg0_idx=42
## IEEE 802.11ac

# controlling enabled
ctrl_interface=/var/run/hostapd
ctrl_interface_group=0