get the Software here

GPDL Latency Tester Case

for an Arduino Nano (USB-C) + Electronics, originally created as a Device aiding in measuring the Latency of Gamepads.
by John Punch Creator/Maintainer of Gamepala based in Ukraine

remixes for Arduino Nano Micro USB welcome here.

GitHub
support him on 

his Ko-Fi

(he is going more than the extra mile)

wanna go the extra mile like John Punch?

check out his Software Suite

including

Prometheus82

A powerful and accurate program for testing the latency of gaming devices on a PC using an analog tester that physically presses buttons and moves joysticks.