Passing params in routes with / as the base url

I want to take a parameter from the index page of my website. The route is like this.
Router::connect(’/’, array(‘controller’ => ‘homes’, ‘action’ => ‘index’, ‘home’));

How to pass params into this so that it’s available in my index() inside HomesController.

Thanks in advance!

It’s working like this.

Router::connect(’/:arg’, array(‘controller’ => ‘homes’, ‘action’ => ‘index’, ‘pass’ => [‘arg’]));

Inside index() am accessing the parameter using $this -> request -> params[“arg”]

Thank you.