Data from phone to pc and back

Hello everyone,

my goal is to make my favourite game Starcraft 2 in AR.
For this to work I need to send inputs from my phone to my pc.
(If I want to use ARKit) Performance is the main concern so I would like to use a cable instead of a local socket or something.

I can't decide which option is the best and would love to receive some advice.

Could I use my phone as a remote controller
and acces my device camera from my pc?

I currently developted a small test standalone using OpenCV in unity. (see picture) And want to change and use ARKit

picture will be uploaded in an hour, somethingg went wrong , excuse me

TLDR; How to send data from from phone to pc

Thanks for reading
Zelos