How can I move a game object/camera along a defined path with a speed defined by input of a (bluetooth) keyboard?

I am a complete Unity noob, although I have been working with it for quite some hours now. What I want to do is create a Virtual World for the Google Carboard, I got a setup for that (using the assets package for cardboard). Now I want to let the camera (and also an object) follow a path through my virtual world. I succeeded in making such a path, using HermiteSpineController (an asset set I got somewhere). But with this I can only adjust the duration of the total movement, so I can only change the time that it will take for the object to go along the whole path. What I actually want is make the object move along the path with a speed, but the speed should be defined by input that I give via (preferably a bluetooth keyboard) an external input device that works with and android phone.

Anyone has ideas? Any help is very welcome, this already cost me a lot of time ;) (What other assets can I use that can do this for me?)

If anything is unclear I would like to hear it as well,

Thanks in advance!

Arne