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A cheap router, with 6 antennae, 4 gigabit LAN ports, and 1 gigabit WAN port. A USB 3.0 port is included for media sharing.

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Circular router with six antennae


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  • Please include only model specific information, omit bla,bla and put everything generic into separate articles
  • If you have no time to write certain stuff, link to docs
  • base-system should lead the way, do not explain this again
  • DO NOT provide a complete howto here! Instead groom the general documentation.

:!: Before installing OpenWrt, make sure you have backed up the OEM firmware!

The OEM web interface accepts only files with names containing WN531A6. It's also impossible to flash the *-sysupgrade.bin image, so we have to flash the *-initramfs-kernel.bin first and use the OpenWrt's upgrade interface to write the sysupgrade image.

  1. Rename the initramfs image to WN531A6.bin.
  2. Connect your computer to the one of the LAN ports of the router with an Ethernet cable and open
  3. Browse to Setup → Firmware Upgrade interface.
  4. Upload the (renamed) OpenWrt image - WN531A6.bin.
  5. Proceed with the firmware installation and give the device a few minutes to finish and reboot.
  6. After reboot wait for the “WAVLINK” logo on the top cover to turn solid blue
  7. When using snapshots, LuCI web interface needs to be installed now if you want to sysupgrade via LuCI.
  8. Open and use the OpenWrt's “Flash Firmware” interface to write the OpenWrt sysupgrade image
  1. Configure a TFTP server on your computer and set its IP to
  2. Rename the OpenWrt sysupgrade image to firmware.bin and place it in the root folder of the TFTP server.
  3. Power off the device and connect an Ethernet cable from one of its LAN ports your computer.
  4. Press the “Reset” button (and keep it pressed)
  5. Power on the device.
  6. After a few seconds, when the connected port LAN LED stops blinking fast, release the “Reset” button.
  7. Flashing OpenWrt takes less than a minute, system will reboot automatically.
  8. After reboot the WAVLINK logo on the top cover will indicate the current OpenWrt running status (wait until the logo tunrs solid blue).

The OEM firmware for the WL-WN531A6 is available on the Wavlink web site. It is also possible to create a backup of the original OEM firmware directly from the router.

The OEM firmware is stored on /dev/mtd4 (“Kernel”).

  1. Plug a FAT32 formatted USB flash drive into the USB port.
  2. Navigate to Setup→USB Storage. Under the Available Network folder you can see part of the mount point of the newly mounted flash drive filesystem - e.g sda. The full mount point is prefixed with /media, so in this case the mount point becomes /media/sda.
  3. Go to
  4. Type the following line in the Command input box:
    dd if=/dev/mtd4ro of=/media/sda/firmware.bin
  5. Click Apply
  6. After few seconds, in the text area should appear this output:
    30080+0 records in
    30080+0 records out
  7. Type sync in the Command input box and click Apply.
  8. At this point the OEM firmware is stored on the flash drive as firmware.bin. The size of the file is 15040 KB.

Follow Flashing instructions (u-boot TFTP) and use the firmware.bin backup image.

Upload the firmware.bin backup image and select Force update before continuing.

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.

FIXME The instructions below are for Broadcom devices and only serve as an example.
Remove / modify them if they do not apply to this particular device!

This section deals with

  • How you install OpenWrt from a device freshly opened
  • The steps required such as reset to factory defaults if the device has already been configured

Note: Reset router to factory defaults if it has been previously configured.

  • Browse to
  • Upload .bin file to router
  • Wait for it to reboot
  • Telnet to and set a root password, or browse to if LuCI is installed.

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

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

FIXME Please fill in real values for this device, then remove the EXAMPLEs

The default network configuration is:

Interface Name Description Default configuration
vlan0 (eth0.0) EXAMPLE LAN ports (1 to 4) EXAMPLE None
vlan1 (eth0.1) EXAMPLE WAN port EXAMPLE DHCP

FIXME Please fill in real values for this device, then remove the EXAMPLEs

Numbers 0-3 are Ports 1-4 as labeled on the unit, number 4 is the Internet (WAN) on the unit, 5 is the internal connection to the router itself. Don't be fooled: Port 1 on the unit is number 3 when configuring VLANs. vlan0 = eth0.0, vlan1 = eth0.1 and so on.

Port Switch port
Internet (WAN) EXAMPLE 4

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.

FIXME Please fill in real values for this device, then remove the EXAMPLEs

The WAVLINK WL-WN531A6 has the following buttons:

EXAMPLE Reset reset
EXAMPLE Secure Easy Setup ses
EXAMPLE No buttons at all. -

Insert photo of front of the casing

Insert photo of back of the casing

Backside label:
Insert photo of backside label

Note: This will void your warranty!

FIXME Describe what needs to be done to open the device, e.g. remove rubber feet, adhesive labels, screws, ...

  • To remove the cover and open the device, do a/b/c

Main PCB:
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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
57600 / 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

None so far.



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  • Last modified: 2024/02/12 11:13
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