I am kind of lost right now. I am setting up 3 zones (with their own transformers) of low-voltage landscape lighting in the fornt and back of my home. I am trying to figure out what I need to set this up via Lutron Caseta to operate/dim each of these zones with my iPhone. In there a guide for Caseta setup and phone app control for low-voltage lighting? What exactly do I need to have hard-wired vs. connected via Wifi? Does the iPhone app use Wifi or Bluetooth? I'm hoping I won't actually need line-of-sight when all is done, similar to how my firepit antenna works with its iPhone app.