This documentation will introduce how to setup Wi-Fi working on AP mode.

For example, the following commands will create AP configuration named Hostspot on interface wlan0, with SSID khadas_ap_2.4G, 2.4GHz band, channel 1, WPA2-PSK security, CCMP encryption and passphrase 12345678.

sudo nmcli con add type wifi ifname wlan0 mode ap con-name Hostspot ssid khadas_ap_2.4G
sudo nmcli con modify Hostspot 802-11-wireless.band bg
sudo nmcli con modify Hostspot 802-11-wireless.channel 1
sudo nmcli con modify Hostspot 802-11-wireless-security.key-mgmt wpa-psk
sudo nmcli con modify Hostspot 802-11-wireless-security.proto rsn
sudo nmcli con modify Hostspot 802-11-wireless-security.group ccmp
sudo nmcli con modify Hostspot 802-11-wireless-security.pairwise ccmp
sudo nmcli con modify Hostspot 802-11-wireless-security.psk 12345678
sudo nmcli con modify Hostspot ipv4.addresses 192.168.2.1/24
sudo nmcli con modify Hostspot ipv4.gateway 192.168.2.1
sudo nmcli con modify Hostspot ipv4.method shared
sudo nmcli con up Hostspot

For example, the following commands will create AP configuration named Hostspot on interface wlan0, with SSID khadas_ap_5G, 5GHz band, channel 149, WPA2-PSK security, CCMP encryption and passphrase 12345678.

sudo nmcli con add type wifi ifname wlan0 mode ap con-name Hostspot ssid khadas_ap_5G
sudo nmcli con modify Hostspot 802-11-wireless.band a
sudo nmcli con modify Hostspot 802-11-wireless.channel 149
sudo nmcli con modify Hostspot 802-11-wireless-security.key-mgmt wpa-psk
sudo nmcli con modify Hostspot 802-11-wireless-security.proto rsn
sudo nmcli con modify Hostspot 802-11-wireless-security.group ccmp
sudo nmcli con modify Hostspot 802-11-wireless-security.pairwise ccmp
sudo nmcli con modify Hostspot 802-11-wireless-security.psk 12345678
sudo nmcli con modify Hostspot ipv4.addresses 192.168.2.1/24
sudo nmcli con modify Hostspot ipv4.gateway 192.168.2.1
sudo nmcli con modify Hostspot ipv4.method shared
sudo nmcli con up Hostspot

Use ifconfig to check if everything has been setup correctly:

$ ifconfig
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.1  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::f0c0:48fd:6d47:6a4b  prefixlen 64  scopeid 0x20<link>
        ether 70:f7:54:e2:90:89  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 30  bytes 4448 (4.4 KB)
        TX errors 0  dropped 2 overruns 0  carrier 0  collisions 0

You connect to AP khadas_ap_2.4G or khadas_ap_5G with password 12345678.