Implement Roomba Locate Service

Was reading this:

and saw that the ticket was closed because

The locate service is not implemented yet for the roomba vacuum platform.

I figure it’s working fine with other vacuums, here’s to hoping we get this functionality for Roombas soon as well.

I was fiddling with this, seems to be working on my two 600 series roombas…

Code is here:

Still working on figuring out all this pull request stuff (this will be my first) would not object to any one testing it as a custom component on other models of Roomba.