I lost connection with the mi mini wifi router after following this procedure. I flashed u-boot to the bootloader, and it succeeded, but It would no longer boot the firmware.
Apparently it did boot into u-boot, but to find that out I had to get a serial console. Instead of getting a usb serial to TTL I tried using a raspberry pi and the GPIOpins. It worked.
opening the MI mini wifi
two screws hold i together, opening it from there was a bit harder. You have to forcefully get underneathe four little hooks at the bottom front of the device
after opening it, all we need is accessible.
soldering a serial port on it
I used an old connector I had lying around, easy t get to the breadboard
next step involves the RPi
you can then hook it up to the RPis Tx, Rx and GND pins. As both devices use 3v3 TTL, no extra circuitry is needed
ssh over to the RPi
once your logged in, type
$ minicom -b 115200 -o -D /dev/ttyAMA0
to start a serial console on the RPis GPIOports. Once it runs, boot the mi and you should see this
now the easy part
connect a UTP cable from a LAN port directly to your computer, and assign your PC a manual address in th 192.168.1.x but not 192.168.1.1
start the http server on the mi
MT7620 # httpd
raspi_read: from:40028 len:6
NetTxPacket = 0x83FB5080
KSEG1ADDR(NetTxPacket) = 0xA3FB5080
Trying Eth0 (10/100-M)
Waitting for RX_DMA_BUSY status Start… done
HTTP server is starting at IP : 192.168.1.1
HTTP server is ready!
Keep going WEB failsafe, rx_counter=0 , GoGoGo!!!
point you browser to 192.168.1.1
and upload your firmware…
I flashed openwrt-ramips-mt7620-xiaomi-miwifi-mini-squashfs-sysupgrade.bin
connect to internet (cable)
and start setting up OpenWRT
$ opkg update && opkg list luci-*
$ opkg install luci-ssl
$ /etc/init.d/uhttpd start
$ /etc/init.d/uhttpd enable
$ uci set wireless.@wifi-device.disabled=0; uci commit wireless; wifi
make sure it boots from the flash partition
by default it waits for a tftp image to be transferred, so:
and take a look at the env variables
this should be
so set it and save it
$ setenv bootcmd bootm bc050000
now reboot, test and go and configure it
3 Replies to “flashing the mi mini wifi router with OpenWRT”
Can this method be used to flash stock firmware if the device is bricked? Or will this only work with OpenWRT
I think this depends on the status of the bootloader, check the LED status, if it accepts telnet connection, you should be fine
In my case i have installed breed boot loader every thing is working fine.
I have did some thing wrong while flashing from then router not responding to flash or reset.
Led status orange+blue (something like pink).
Can you suggest in this case.