Xiaomi Wifi Router 3 - Brick

Installing and Using OpenWrt
1

Hello,
I flashed custom openwrt
after the reboot the routers goes in kernel panic and reboots in a loop
can't use the boatload menu it automatically goes to option 3
If any one have been gone through similar problem or have any good advice.
Please help.
Here is the log:

Ralink UBoot Version: 4.2.S.1
-------------------------------------------- 
ASIC 7620_MP (Port5<->None)
DRAM_CONF_FROM: Auto-detection 
DRAM_TYPE: DDR2 
DRAM component: 1024 Mbits
DRAM bus: 16 bit
Total memory: 128 MBytes
Flash component: NAND Flash
Date:Apr 15 2016  Time:17:46:32
============================================ 
icache: sets:512, ways:4, linesz:32 ,total:65536
dcache: sets:256, ways:4, linesz:32 ,total:32768 

 ##### The CPU freq = 580 MHZ #### 
 estimate memory size =128 Mbytes

Please choose the operation: 
   1: Load system code to SDRAM via TFTP. 
   2: Load system code then write to Flash via TFTP. 
   3: Boot system code via Flash (default).
   4: Entr boot command line interface.
   9: Load Boot Loader code then write to Flash via TFTP. 

   
3: System Boot system code via Flash.
Booting System 2
..ranand_erase_write: offs:40000, count:20000
.Done!
done
## Booting image at bc600000 ...
   Image Name:   MIPS OpenWrt Linux-4.14.89
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    1596367 Bytes =  1.5 MB
   Load Address: 80000000
   Entry Point:  80000000
.........................   Verifying Checksum ... OK
   Uncompressing Kernel Image ...
2

Reset button don't work too.

3

In serial console keep the key (number) for the desired boot mode pressed and power on the device.
For me it's only working from a cold boot and not from a warm boot (reset).

4

Tried many times, but no luck

5

Then try another serial adapter...
My device runs the same bootloader version.
I've tried also more than one serial adapter, lastly a arduino nano with pulled down reset worked fine.

Use bootmode 1 and load a initram openwrt image from tftp. From there you can flash easily a sysupgrade image / tar file.

6

i have used prolific and arduino uno and i was writing to serial via bash script but unfortunately it didn't help.

7

same quetion, is it solved?