Guys, read the GIMX main page carefully:
http://gimx.fr/wiki/index.php?title=Main_Page#Hardware_requirements
Using bluetooth is NOT a requirement for PS4 if you're running Windows or Unbutu. It is
*optional*. It is one of
two methods for getting it to work.
I'm assuming we're all on Windows, yes? Using the USB cable connection method does not involve using a BT dongle in anyway as far as I can tell.
When using the USB cable solution, there is no need to use an AVR USB board such as the Teensy or whatever. It's a straight connection. The Teensy 2.0 is only if you're going the BT Dongle route.
Even better news....if you look closely he mentions that we can buy and use either a Chronus Max or a Titan One as a replacement for the PC to PS4 USB adapter! Meaning we don't even have to build the adapter ourselves if we don't want to!