Ubiquiti UniFi 6 Lite

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Write a short, relevant description of the device. Include a technical overview, but avoid marketing buzzwords/useless stuff. Two to four sentences is about right. A picture is good, too. Edit the page to see how to add pictures.

Ubiquiti has released a new series of UniFi APs supporting AX.

FIXME Any text with a light background (like this one) provides instructions for creating the Details Page. When you have filled in correct/useful information (instead of any template that's there) remove the instructions, as well as the <WRAP> that encloses it.

Generic Router


  1. This is an empty template that suggests the information that should be present on a well-constructed Device Page. This means, that you have to fill it with life and information.
  2. There are several “fixme” tags with text on a light background (like this text) throughout this template. As you fill in the page, remove those tags so that people can judge its completeness.
  3. When there are no more “fixme” tags left, delete this one too, along with the <WRAP> that encloses it.
  • 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.
ModelVersionSoCCPU MHzFlash MBRAM MBWLAN HardwareWLAN2.4WLAN5.0100M portsGbit portsModemUSB
UniFi 6 LiteMediaTek MT7621AT88032256MediaTek MT7603, MediaTek MT7915b/g/na/n/ac/ax-1--
  1. Connect to the booted device at using username/password “ubnt”.
    ssh ubnt@
  2. Update the bootloader environment.
    fw_setenv devmode TRUE
    fw_setenv boot_openwrt "fdt addr \$(fdtcontroladdr); fdt rm /signature; bootubnt"
    fw_setenv bootcmd "run boot_openwrt"
  3. At this point you may verify that everything is set correctly.
  4. Transfer the OpenWrt sysupgrade image to the device using SCP.
    scp openwrt.bin ubnt@
  5. Check the mtd partition number for bs / kernel0 / kernel1
    cat /proc/mtd
  6. Set the bootselect (bs) flag to boot from kernel0
    dd if=/dev/zero bs=1 count=1 of=/dev/mtdblock4
  7. Write the OpenWrt sysupgrade image to both kernel0 as well as kernel1
    dd if=openwrt.bin of=/dev/mtdblock6
    dd if=openwrt.bin of=/dev/mtdblock7
  8. Reboot the device. It should boot into OpenWrt.

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

If flashing went wrong, your device may not be able to boot. You may find out what your device is doing with its LED pattern. See https://help.ui.com/hc/en-us/articles/204910134 for a description of LED patterns.

Recovery can be done with TFTP as explained in https://help.ui.com/hc/en-us/articles/204910124-UniFi-TFTP-Recovery-for-Bricked-Access-Points.

  1. Download the OEM stock firmware at https://www.ui.com/download/unifi/unifi-6-lite-ap. I chose the oldest one available, which is 5.43.19 at the time of writing. I will assume it is called firmware.bin in what follows. (Direct Link, Alternative Link, sha256sum: 441436c111466b7c55bca294a401aaeb5f74500ca0724df23a6fa46466766176)
  2. Disconnect any ethernet cable and turn off the WiFi from your computer.
  3. Set your IP address to, subnet to and gateway to Preferably through your distribution's network manager, otherwise adapt the following lines to your setting. eno2 might need to be adapted, check your interface's name with ip a.
    ifconfig eno2 netmask up
    route add default gw
  4. Connect your UniFi 6 Lite to your computer. At this point you will need to know its IP address. The official documentation says it should be but mine was at so you may need to find its IP address by capturing network packets: tcpdump -i eno2 arp. You should see some packets with the AP's IP address when you plug it in.
  5. Launch TFTP.
    1. If your device isn't in TFTP mode (flashing White-Blue-Off), put it in TFTP mode now. Mine was already, so this is from the official documentation: unplug the ethernet cable from the device, then press the reset button with a paper clip. While holding the reset button, plug the ethernet cable back in. Keep holding the reset button until you see the LED flashing.
  6. Issue the following commands.
    rexmt 1
    timeout 60
    put firmware.bin
  7. The device should automatically reboot with the OEM stock firmware in place when the file transfer is done.

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 Ubiquiti UniFi 6 Lite has the following buttons:

EXAMPLE Reset reset
EXAMPLE Secure Easy Setup ses
EXAMPLE No buttons at all. -
Brand Ubiquiti
Model UniFi 6 Lite
Device Type WiFi AP
Availability Available 2021
Comments - general
OpenWrt Support
Supported Since Commit https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=fb4d7a9680117a00721936c98ce41eeb2dea95c9
Supported Since Release 21.02.0
Supported Current Release 21.02.3
Bootloader U-Boot
Target ramips
System-On-Chip MediaTek MT7621AT
CPU MHz 880
Flash MB 32
RAM MB 256
Ethernet 100M ports -
Ethernet Gbit ports 1
Switch ¿
Modem -
Comments - network ports
WLAN 2.4GHz b/g/n
WLAN 5.0GHz a/n/ac/ax
WLAN Hardware MediaTek MT7603, MediaTek MT7915
Detachable Antennas -
Comments - WLAN ac/ax on 5 GHz only, 2x2 MIMO (300 Mbps @ 2.4 Ghz, 1201 Mbps @ 5 GHz)
USB ports -
SATA ports -
Serial Yes
Comments - USB & SATA ports
LED count 2
Button count 1
Power supply PoE 802.3af, passive PoE 48 VDC, 0.32 A
Forum Topic URL
WikiDevi URL
OEM device homepage URL https://store.ui.com/collections/unifi-network-access-points/products/unifi-ap-6-lite
Firmware OEM Stock URL https://www.ui.com/download/unifi/unifi-6-lite-ap
Firmware OpenWrt Install URL
Firmware OpenWrt Upgrade URL https://downloads.openwrt.org/releases/21.02.3/targets/ramips/mt7621/openwrt-21.02.3-ramips-mt7621-ubnt_unifi-6-lite-squashfs-sysupgrade.bin
Edit the underlying data View/Edit data

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:
Insert photo of 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 Ubiquiti UniFi 6 Lite
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: 2022/05/03 15:36
  • by tmomas