Ubiquiti UniFi 6 Lite

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

• UniFi 6 Lite
• UniFi 6 Long Range

1. Connect to the booted device at 192.168.1.20 using username/password “ubnt”.

   ssh ubnt@192.168.1.20

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.

   fw_printenv

4. Transfer the OpenWrt sysupgrade image to the device using SCP.

   scp openwrt.bin ubnt@192.168.1.20:~/

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.

→ generic.flashing.tftp

→ generic.sysupgrade

cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
sysupgrade /tmp/xxx.abc

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 192.168.1.25, subnet to 255.255.255.0 and gateway to 192.168.1.20. 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 192.168.1.25 netmask 255.255.255.0 up
   route add default gw 192.168.1.20

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 192.168.1.20 but mine was at 192.168.1.33 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.

   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.
   

   connect 192.168.1.20
   binary
   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.

→ generic.debrick

→ failsafe_and_factory_reset

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

→ 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.

Front:
Insert photo of front of the casing

Back:
Insert photo of back of the casing

Backside label:
Insert photo of backside label

Note: This will void your warranty!

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

→ 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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