Xiaomi R2100 - Help with Restoring to stock fw

Hello guys,
After a long time with OpenWrt i’ve messed up
My configuration and it’s time for me to go back for stock firmware.
I currently have latest OpenWrt installed on the router with SSH root access and I have the stock xiaomi bin for my router.
I tried setting it up with PXE server but the router couldn’t flash it for some reason, does anyone has the right command to revert it stock?
Thanks in advance,

Did you check your device's page in the wiki?

I'm not linking to it, as there are several similarly named devices and your model name being a bit too ambiguous.

Yes, it didn’t told me much honestly