nm

sudo nmcli con delete PiHotspot
sudo nmcli con add type wifi ifname wlan0 con-name PiHotspot autoconnect yes ssid Pi
sudo nmcli con modify PiHotspot 802-11-wireless.mode ap 802-11-wireless.band bg ipv4.method shared
sudo nmcli con modify PiHotspot wifi-sec.key-mgmt wpa-psk
sudo nmcli con modify PiHotspot wifi-sec.psk "raspberry"
sudo nmcli con up PiHotspot

sudo nmcli con modify PiHotspot wifi-sec.key-mgmt wpa-psk
sudo nmcli con modify PiHotspot 802-11-wireless-security.proto rsn
sudo nmcli con modify PiHotspot 802-11-wireless-security.pairwise ccmp
sudo nmcli con modify PiHotspot 802-11-wireless-security.group ccmp

sudo nmcli con delete PiHotspot
sudo nmcli dev wifi hotspot ifname wlan0 ssid "PiOpen" band bg

sudo nmcli con add type wifi ifname wlan0 con-name PiOpen autoconnect yes ssid PiOpen
sudo nmcli con modify PiOpen 802-11-wireless.mode ap 802-11-wireless.band bg
sudo nmcli con modify PiOpen ipv4.method shared
sudo nmcli con modify PiOpen wifi-sec.key-mgmt none

sudo nmcli con delete PiOpen 2>/dev/null
sudo nmcli con add type wifi ifname wlan0 con-name PiOpen ssid PiOpen
sudo nmcli con modify PiOpen 802-11-wireless.mode ap \
    802-11-wireless.band bg \
    ipv4.method shared \
    connection.autoconnect yes \
    wifi-sec.key-mgmt none
sudo nmcli con up PiOpen