ZBT WE3526

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This router is available directly from OEM manufacturer Shenzhen Zhibotong Electronics Co., Ltd. as ZBT WE3526 or in rebranded form sold by Polish ISP Korbank as Korbox Gigabitus R1219. ZBT version usually has white plastic case and 512MB RAM, Korbox version always has black plastic case with their logo printed on it and 256MB RAM. Both versions have microSD slot available. Maybe other OEM rebranded versions exist.

ModelVersionSoCCPU MHzFlash MBRAM MBWLAN HardwareWLAN2.4WLAN5.0100M portsGbit portsModemUSB
WE3526MediaTek MT7621AT88016512MediaTek MT7603E, MediaTek MT7612Eb/g/na/n/ac-5-1x 2.0

FIXME Find out flash layout, then add the flash layout table here (copy, paste, modify the example).

Please check out the article Flash layout. It contains examples and explanations that describe how to document the flash layout.

Procedure below is exactly the same for brand new (never used and never configured) and used router.

  • press RESET button on the back of the device
  • while keeping RESET button pressed apply power to the device
  • release the button 3 seconds after applying power
  • set your PC to static IP and connect to any of four LAN ports
  • visit with your web browser of choice and upload firmware, router will reboot into OpenWrt automatically

Specific values needed for tftp

FIXME Enter values for “FILL-IN” below

Bootloader tftp server IPv4 address FILL-IN
Bootloader MAC address (special) FILL-IN
Firmware tftp image Latest OpenWrt release (NOTE: Name must contain “tftp”)
TFTP transfer window FILL-IN seconds
TFTP window start approximately FILL-IN seconds after power on
TFTP client required IP address FILL-IN


FIXME These are generic instructions. Update with your router's specifics.

  • Browse to LuCI Upgrade URL
  • Upload image file for sysupgrade to LuCI
  • Wait for reboot

If you don't have a GUI (LuCI) available, you can alternatively upgrade via the command line. There are two command line methods for upgrading:

  • sysupgrade
  • mtd

Note: It is important that you put the firmware image into the ramdisk (/tmp) before you start flashing.


  • Login as root via SSH on, then enter the following commands:
cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
sysupgrade /tmp/xxx.abc


If sysupgrade does not support this router, use mtd.

  • Login as root via SSH on, then enter the following commands:
cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
mtd write /tmp/xxx.abc linux && reboot


Use OEM easy install procedure if bootloader is still intact.

Basic configuration After flashing, proceed with this.
Set up your Internet connection, configure wireless, configure USB port, etc.

The default network configuration is:

Interface Name Description Default configuration
br-lan LAN & Wi-Fi
vlan0 (eth0.1) LAN ports (1 to 4) contained within br-lan
vlan1 (eth0.2) WAN port DHCP
wlan0 Wi-Fi 2,4GHz contained within br-lan
wlan1 Wi-Fi 5GHz contained within br-lan
Port Switch port
Internet (WAN) WAN (blue)
LAN 1 LAN1 (yellow)
LAN 2 LAN2 (yellow)
LAN 3 LAN3 (yellow)
LAN 4 LAN4 (yellow)

hardware.button on howto use and configure the hardware button(s). Here, we merely name the buttons, so we can use them in the above Howto.

The ZBT WE3526 has the following buttons:

RESET reset
Brand ZBT
Model WE3526
Device Type WiFi AP
Availability Available 2019
Comments - general
OpenWrt Support
Supported Since Commit https://git.lede-project.org/?p=source.git;a=commit;h=9996480b0ee80456af0b9fc3d44580393b09c84b
Supported Since Release 18.06.0
Supported Current Release 21.02.0
Bootloader U-Boot
Target ramips
CPU MHz 880
Flash MB 16
RAM MB 512
Ethernet 100M ports -
Ethernet Gbit ports 5
Switch MediaTek MT7621AT
Modem -
Comments - network ports
WLAN 2.4GHz b/g/n
WLAN 5.0GHz a/n/ac
WLAN Hardware MediaTek MT7603E, MediaTek MT7612E
Detachable Antennas -
Comments - WLAN
USB ports 1x 2.0
SATA ports -
Serial ¿
Comments - USB & SATA ports
LED count 8
Button count 1
Power supply ¿
Forum Topic URL
WikiDevi URL
OEM device homepage URL http://www.zbtlink.com/products/313.html
Firmware OEM Stock URL
Firmware OpenWrt Install URL
Firmware OpenWrt Upgrade URL http://downloads.openwrt.org/releases/21.02.0/targets/ramips/mt7621/openwrt-21.02.0-ramips-mt7621-zbtlink_zbt-we3526-squashfs-sysupgrade.bin
Edit the underlying data View/Edit data

frontside of the router

backside of the router

Backside label:
bottom sticker

Note: This will void your warranty!

To remove cover and open the device please remove four rubber feet and remove four Philips screws.

Main PCB:

Obverse: obverse of the PCB

Reverse: reverse of the PCB

port.serial general information about the serial port, serial port cable, etc.

How to connect to the Serial Port of this specific device:
Insert photo of PCB with markings for serial port

FIXME Replace EXAMPLE by real values.

Serial connection parameters
for ZBT WE3526
EXAMPLE 115200, 8N1

port.jtag general information about the JTAG port, JTAG cable, etc.

How to connect to the JTAG Port of this specific device:
Insert photo of PCB with markings for JTAG port



Space for additional notes, links to forum threads or other resources.

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  • Last modified: 2021/07/12 20:04
  • by ksx4system