Hardly change the ZTE E8820S router, brush the breed=>third-party firmware

flashing is risky, so you need to be cautious when you do it.

Hard-modified equipment:

ZTE E8820S: ( master chip: MT7621, NAND Flash: 128M, RAM: 256M, gigabit Ethernet port (a fish 50) _span _span _span6 pspan0 only) I want to turn it into a managed gigabit switch . I found a number of tutorials on the Internet, followed by myself, and succeeded.

Hard modification tools:

1. CH340E USB to TTL module (a treasure has more than 6 modules, including pins and Dupont line )

2, soldering iron

3, p empty USB flash drive

The LAN port of the router is connected to the computer during the whole journey.

Steps:

1. Record the MAC address:

1. First connect the computer to E8820S, enter the [Expert Mode] interface, and copy the three MACs in the figure below ( WAN5span WAN5span WAN, 2.4G, 5G, 5G, 5G, 5G, 5G, 5G )save.

Record the three mac addresses in the above picture

2. Download the B70 breed from the website ( breed-mt7621-hiwifi-hc5962 ) and copy it to the root directory of the USB flash drive (renamed _span6) .bin ).

2. Disassembly and hardware solution

1. Connect to the TTL to USB module. ( pay attention not to power on the routing motherboard )

Remove the two screws at the bottom of the E8820S and lift off the three pins soldered to the TTL interface (GND, TX, RX) of the router circuit board, and then use DuPont cables Correspondingly connect to CH340E.

2, CH340E connect to the computer : Find the CH340E just connected under the computer’s device manager => ports (COM and LPT), and write down the port number (example: COM4) _p1sp p0 3. Open putty , set the parameters, and wait for the connection, as shown in the figure.

1. Set up

2. Connect to

3. Wait for

4. After the router is powered on, the information will be displayed on the control window. Enter the user name (zte_wrt) and password (12345!@#$%) on the console interface to log in, and insert the U disk with the breed file that has just been prepared into the router USB.

input in the following order of commands:

1)# cat /proc/mtd (display the original system)

display as follows:

_dev: sizep6span

00000 00 00 00 Whole flash "

mtd1: 00220000 00020000" Bootloader "

mtd2: 00140000 00020000" indiv "

mtd3: 00140000 00020000" tag "

mtd4: 00180000 00020000" usercfg "

mtd5: 00180000 00020000 "backcfg"

mtd6: 00180000 00020000 "defcfg"

mtd7: 00180000 00020000 "env"

mtd8: 00180000 00020000 "log"

mtd9: 01900000 00020000 " version1"

mtd10: 01900000 00020000 "version2"

mtd11: 00e60000 00020000 "fs1"

span5 span mtd12: 00e60000 00020000 "fs2"

mtd13: 00800000 00020000 "plugin"

2)# cd /mnt/usb1p 3_1/ (enter the USB drive root directory) _span/ cat mtd0> whole.bin (backup Whole flash to U disk,(Slightly longer time)

4)# cat /dev/mtd1> Bootloader.bin (backup Bootloade to the USB flash drive)

5)# cat /dev/mtd1 ( brush into breed )

6)# reboot Restart the router

Open the computer browser http://192.168.1.1 to open the breed, flash into the new system, and remember to modify it to the record at the beginning MAC address. Restart again is the new system.

Not satisfied with the new system? Turn off the machine, hold the thin needle against reset, turn on the machine, and then you can enter Breed again to refresh.

Flashing is risky, so be careful when you do it.