try s905x2-km3

Thank you it's booted but i couldn't connect web-ui at all. Am i doing something wrong?
When i check ip address it seems exist.

There are already 192.168.1.1 devices in your LAN that will have IP conflicts. Connect the box to the computer with a network cable.

Log in to the system: Connect the computer and the s9xxx box with a network interface → turn off the wireless wifi on the computer → enable the wired connection → manually set the computer ip to the same network segment ip as openwrt, ipaddr such as 192.168.1.2. The netmask is 255.255.255.0, and others are not filled in. You can log in to the openwrt system from the browser, Enter OpwnWrt's IP Address: 192.168.1.1, Account: root, Password: password, and then log in OpenWrt system.

Do you have a monitor and keyboard? Connected, after the startup code stops, press Enter to see the welcome interface, right?

I've done it mate. I've used km3 before and probably it doesn't recognize lan port. Now i'm using k3 version and everything is ok.
I wanna ask 2 questions :)
1- Is there any way to get work wifi ?
2- I want to install to device but which one should i select from the menu. My device doesn't exist in there.
And i can't also back up my tv-box system it gives error.

You are using the default firmware of s905x2-km3, did you modify anything?

cat /boot/uEnv.txt

Send a screenshot.

Install option 303 - MECOOL KM3 4G

No i'm using openwrt_official_s905x2_k5.10.158_2022.12.09.img km3 one had ethernet issue.
This is the screenshot and yes i'm using with default options.

Install option 301 - X96-Max-4GB

These are for just install or these gonna make my wifi works also?
It doesn't make my device brick don't it?
I'll do this like this, right?

And thank for your help 😊

right

In this way, you can write to emmc without using usb.

The wifi may not be available. You didn't provide the wifi chip model of the motherboard. I looked at the photo you sent and couldn't guess what might be inside.

Sorry dear developer it's my fault.
Here it is;
Network: Wifi ac 2×2 (RTL8222BS) – Bluetooth 4.1 – Ethernet Gigabit

https://github.com/unifreq/linux-5.15.y/tree/main/drivers/net/wireless/realtek

no drivers.

I see dear developer. I'll buy something with compatible. Thank you for all :)