Create Hotspot with WEP

create-hotspot-wep.sh

[user@fdr-lnx ~]$ nmcli connection down MyFedoraHotspot
Connection 'MyFedoraHotspot' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/16)
[user@fdr-lnx ~]$ nmcli connection delete MyFedoraHotspot
Connection 'MyFedoraHotspot' (076c78bf-9e91-4779-832e-7306adb7b277) successfully deleted.
[user@fdr-lnx ~]$ ls -lh /etc/NetworkManager/system-connections/ | grep MyFedoraHotspot
[user@fdr-lnx ~]$ nmcli con add type wifi ifname wlp0s30f4 con-name MyFedoraHotspot autoconnect yes ssid MyFedoraHotspot
Connection 'MyFedoraHotspot' (9ec71f65-881b-43b3-b666-710a21d5c6a9) successfully added.
[user@fdr-lnx ~]$ nmcli con modify MyFedoraHotspot 802-11-wireless.mode ap 802-11-wireless.band bg ipv4.method shared
[user@fdr-lnx ~]$ nmcli con modify MyFedoraHotspot wifi-sec.key-mgmt none
Warning: WEP encryption is known to be insecure.
[user@fdr-lnx ~]$ nmcli con up MyFedoraHotspot
Passwords or encryption keys are required to access the wireless network 'MyFedoraHotspot'.
Warning: password for '802-11-wireless-security.wep-key0' not given in 'passwd-file' and nmcli cannot ask without '--ask' option. 
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/18)

https://gist.github.com/gowrav/f45e334acc3be1bca3ef5a46786052f2

https://gist.github.com/narate/d3f001c97e1c981a59f94cd76f041140

https://unix.stackexchange.com/questions/234552/create-wireless-access-point-and-share-internet-connection-with-nmcli/310699#310699

You can use nmcli device or ifconfig to see your device name, which is used for ifname.