wpa_supplicant configurations are stored in /etc/wpa_supplicant/wpa_supplicant-wlan0 (or equivalent).

WiFi Connection

1wpa_cli

Once in, scan the network, add an empty place to store credentials, then input them.

1scan

1scan_results

1add_network

This outputs a network number, e.g. '3'. This is the new network you'll work with.

1set_network *3* ssid *"Kosachok Cafe"*

1set_network 3 psk *"Kosachok2019"*

OR (for no password)

1set_network *3* key_mgmt NONE

1enable_network 3

1save_config

This takes a while to connect, so to speed things up, restart the service:

1sudo sv restart wpa_supplicant

Scripts

You can script like this:

1wpa_cli add_network

That returns an ID, so you can say:

1newNetwork="$(wpa_cli add_network)"

Then $newNetwork would equal that number, and you can add/ remove networks with scripts.

But remember to escape the quotes, so adding a network would be:

1wpa_cli set_network *3* psk *\""passphrase"\"*

Generating Keys Manually

1wpa_passphrase [ssid] [password]

For example:

1wpa_passphrase 'Cafe Kosachok' 'Kosachok2019'

This then spills the relevant psk and such to be entered into the wpa_supplicant configuration file.

If you encounter problems, you will probably need to delete the old device pid in (e.g.) /run/wlan0/

Next up, start wpa_supplicant:

1wpa_supplicant -B -iwlan0 -c /etc/wpa_supplicant/wpa_supplicant-wlan0

The -B flag runs this as a background process. Remove this to see real-time output in order to solve problems. The -i flag denotes the physical device used for the wifi. The -c flag points to the configuration file for use.