9 push buttons

Hi! I’m working on a WLED installation and I need a binary file with 9 push buttons. ESP32 DEVKIT V1. Can anyone help me with compiling such .bin file?

Install Microsoft Visual Studio Code (free) and PlatformIO extension in VSC (also free).
Then clone Github repository (you can do it from within VSC od download zip from Github). Create (or update) build environment (in platformio.ini file) that includes -D WLED_MAX_BUTTONS=9 build flag.

There are several YT videos describing each of these steps.