wifi_setup -i interface -e essid [-p psswd]
Each options must, MUST, be followed directly, DIRECTLY, by its value
-i, --interface_
Specify which interface to use.
-s, -e, --ssid, --essid
The name of the network you wish to connect to.
The previous sentence end with 'to', ewww!!
-p, --psswd
This option is not always necessary.
Required if the network is protected by a password only.
-h, --help
Print this message and exit.