A little experiment with a Gargoyle router that I run at home and Protractor to learn for browser-based UI automation. Because this is just automating UI interactions with a Web application, if/when the app changes (ie. UI texts, internal HTML), automation could break, very easily.
https://www.gargoyle-router.com (my setup: 1.12.0 on TL-WR1043N)
This is a Node application, thus you need node and npm. In my Docker env, I have node v10.19.0 and npm 6.13.4.
You will need;
$GARGOYLE_PASSWORDto log in to your Gargoyle router
Once you have that in place, you can do;
$ npm run isolate
...to isolate WiFi clients, equivalent to you going to Gargoyle console > Connection > Basic > "Access Point SSID" section, and selecting "Enabled" in client isolation.
$ npm run mingle
...to allow WiFi clients to access each other, equivalent to you going to Gargoyle console > Connection > Basic > "Access Point SSID" section, and selecting "Disabled" in client isolation.
$ npm run kick-usb
...to re-Save USB storage settings (which sometimes seems to help mount/ftp access), equivalent to you going to System > USB Storage, and clicking "Save Changes" button.