Use Android Compass rotation in PC Game

The question is: How do I access the Android's compass rotation and use that information on a Unity game (on a PC)?

I'm not sure about what to do here, or what to look at... Is there a way to access that information through USB? Or do I need to make an Android client that sends that information to a server (on the PC)?

I'm quite new to programming and Unity as well, so could someone point me in the right direction?

Thanks in advance