Need help about a split keyboard

[pppppppp1234]

From this qmk docs, https://github.com/qmk/qmk_firmware/blob/master/docs/feature_split_keyboard.md
I had just create my firmware that consists only two keys to test my split keyboard connectivity (I just wired the D0, VVC and GND pins between the 2 pro micro) but I can't get the other half to register my key.
I don't know what I am doing wrong
This is my config.h file
#define MASTER_LEFT
#define SOFT_SERIAL_PIN D0
#define SPLIT_USB_DETECT

rules.mk
SPLIT_KEYBOARD = yes

info.json
{
    "bootloader": "caterina",
    "diode_direction": "COL2ROW",
    "features": {
        "bootmagic": true,
        "command": false,
        "console": false,
        "extrakey": true,
        "mousekey": true,
        "nkro": true
    },
    "matrix_pins": {
        "cols": ["C6"],
        "rows": ["F4", "F5"]
    },
    "processor": "atmega32u4",
    "url": "",
    "usb": {
        "device_version": "1.0.0",
        "pid": "0x0000",
        "vid": "0xFEED"
    },
    "layouts": {
        "LAYOUT_ortho_4x4": {
            "layout": [
                {"matrix": [0, 0], "x": 0, "y": 0},
                {"matrix": [1, 0], "x": 0, "y": 1}
            ]
        }
    }
}

[pppppppp1234]

This is my wiring for the keyboard
https://ibb.co/7k4387c
https://ibb.co/PWBbC3G
https://ibb.co/qDG7pZn

[zegonix]

did you take a look at other split keyboards configurations? preferably one that uses the same controller.. looking at the config it seems that the solfe might be worth to take a look at.
https://github.com/qmk/qmk_firmware/tree/master/keyboards/sofle/rev1

[ernesto]

Hey, where are you in Europe? If you want to do more research on what you want I can solder it up for you? I feel like with the amount you're paying you might as well get something exactly to your specification

[perrytone]

It looks like your split keyboard isn’t registering the other half because the wiring or pin configuration might not match what QMK expects. Make sure the soft serial connections (D0, VCC, GND) are correct between the master and slave, and consider removing SPLIT_USB_DETECT to explicitly define the master half. Also, double-check that the matrix pins in your info.json match the actual pins on both halves. Enabling CONSOLE_ENABLE can help debug whether the slave is sending any signals at all.