Scan ssid by mobile phone the SSID can be seen . but always in password loop. I've installed hostapd V2.7 and dnsmasq V2.79. and wpa_supplicant and networkmanager are stopped. The config files are as below: 1: etc/hostapd/hostapd.conf interface=wlan0 driver=nl80211 ssid=TinkerNet hw_mode=g channel=7 wmm_enabled=0 macaddr_acl=0 auth_algs=1 ignore_broadcast_ssid=0 wpa=3 wpa_passphrase=mypassphrase wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP rsn_pairwise=CCMP 2:/etc/dnsmasq.conf interface=wlan0 # Use the require wireless interface - usually wlan0 dhcp-range=192.168.1.2,192.168.1.254,255.255.255.0,12h Then I try armbian-config ...strange thing, there is not hotspot option in network. Anyone could explain how to config hotspot on Tinkerborad S with Ubuntu 18.04?