+Hasu's main thread for the converter
+ https://geekhack.org/index.php?topic=69169.0
+Build guide for the Pro Micro variant
+ https://geekhack.org/index.php?topic=80421.0
+Original TMK version of the converter
+ https://github.com/tmk/tmk_keyboard/tree/master/converter/usb_usb
+USB Host Shield 2.0