Help burning firmware - TRRS wiring

[Shaytan05]

Hello everyone, I built my redox keyboard, but I just realize that I needed a lot of knowledge about programming that I don't have. I don't even know where to start learning something about, I'm just going crazy!
The only thing I could do is to burn a firmware from QMK configurator and flash into both the keyboard sides. Now the left side works properly, the right not, because I also installed 30 rgb led (without 4,7k resistors) and I understood I have to set the serial communication. I edited the config.h, I have the .json file with my keymap dowloaded from QMK configurator, but I really don't know ho to burn the firmware. I'd also like to sett EE_HANDS to use the 2 sides separatly, but for now I will be very happy to make them work together.

Please, someone can help me with this?

[Shaytan05]

Ok, finally I managed to compile the firmware with the settings I needed and flashed the same on both side. The left side is working properly, but the right when connected via TRRS turns on (on the board the green led is turning on) but doesn't do anything. If connected alone it works like a mirrored left.

I use led strip, so serial connection, and I think my TRRS wiring is wrong...

TRRS LEFT SIDE: GND-PD1-PD0-D0(ON THE STRIP)
TRRS RIGHT SIDE: GND-PD1-PD0-D0(ON THE STRIP)

What is wrong?