How to setup the Wi-Fi working on STA+AP mode at the same time.

Configure wlan0 to STA mode, and wlan1 to AP mode.

Setup wlan1 as a hotspot.

For example, the following commands will create AP configuration named Hostspot on interface wlan1, 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 wlan1 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.method shared
sudo nmcli con up Hostspot

For example, the following commands will create AP configuration named Hostspot on interface wlan1, with SSID khadas_ap_5G, 5GHz band, channel 149, WPA2-PSK security, CCMP encryption and passphrase 12345678.

sudo nmcli con add type wifi ifname wlan1 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.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 192.168.31.219  netmask 255.255.254.0  broadcast 192.168.31.255
        inet6 fda2:a164:f7fb:4b66:1466:7d8b:b8e3:49a  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::6eed:eaf2:6ba8:5cd7  prefixlen 64  scopeid 0x20<link>
        inet6 fda2:a164:f7fb:4b66:a823:4487:8651:4d61  prefixlen 64  scopeid 0x0<global>
        ether 10:2c:6b:10:d5:0a  txqueuelen 1000  (Ethernet)
        RX packets 4271  bytes 3725737 (3.7 MB)
        RX errors 0  dropped 13  overruns 0  frame 0
        TX packets 1663  bytes 321613 (321.6 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
 
wlan1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.42.0.1  netmask 255.255.255.0  broadcast 10.42.0.255
        inet6 fe80::6342:2516:ef70:23a0  prefixlen 64  scopeid 0x20<link>
        ether 12:2c:6b:10:d5:0a  txqueuelen 1000  (Ethernet)
        RX packets 1569  bytes 299041 (299.0 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 3241  bytes 3693502 (3.6 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

Verify that wlan0 has a working internet connection:

khadas@Khadas:~$ sudo ping -I wlan0 www.khadas.com
PING td-balancer-dc11-60-161.wixdns.net (185.230.60.161) from 192.168.124.80 wlan0: 56(84) bytes of data.
64 bytes from 185.230.60.161 (185.230.60.161): icmp_seq=1 ttl=240 time=293 ms
64 bytes from 185.230.60.161 (185.230.60.161): icmp_seq=2 ttl=240 time=316 ms
64 bytes from 185.230.60.161 (185.230.60.161): icmp_seq=3 ttl=240 time=238 ms
...

Verify that wlan1 can be used as a hotpot:

• Name: 2.4G/khadas_ap_2.4G, 5G/khadas_ap_5G
• Password:12345678