Logitech F710 Bluetooth Hack

Logitech F710 gamepad, which I have been using for a long time, cannot use bluetooth due to the fact that it was released at the beginning of 2010. It can communicate with a usb receiver that only works with 2.4Ghz radio waves. While most modern devices now use bluetooth, it's frustrating for me not to be able to use the F710 gamepad with these devices. That's why I started this project and I want to bring this ancient gamepad into the modern age.

I'm still at the very beginning of the project, first I'm trying to find out which buttons are connected with which pins. They appear to be connected in the form of a matrix. My plan is to replace the existing rf module with an ESP32 module of my own design, after figuring out which buttons are connected in what way.