Openwrt Serial Console Mini Computers

I lost connection with the mi mini wifi router after following procedure. I flashed 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.

For people who don't like to hold the Reset switch, note that there is a utility that will trigger the bootloader console remotely: with the router powered off and connected to your computer through Ethernet, run the program, press the only button and then power on the router.

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Instead of getting a usb serial to TTL I tried using a raspberry pi and the GPIOpins. 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 holes in the router 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 nice solderpads, easy connection 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 ETH_STATE_ACTIVE!! HTTP server is starting at IP: 192.168.1.1 HTTP server is ready!

Keep going WEB failsafe, rx_counter=0, GoGoGo!!!