Navigate to Devices.
Click on the device to update.
Select the Config tab → Manage Device → Custom Upgrade.
Enter a link that points to the new firmware version.
NOTE: Firmware .bin file links can be found on our official Downloads page under the Firmware section, or within the Releases section in the Community pages.
SSH into the Access Point using the username ubnt and password ubnt.
ssh ubnt@192.168.1.18 ubnt@192.168.1.18's password:
Then issue the command:
upgrade https://dl.ui.com/unifi/firmware/U7PG2/4.3.21.11325/BZ.qca956x.v4.3.21.11325.200922.1139.bin
NOTE: The AP will then upgrade and you should be able to adopt it.
SCP the binary onto the AP from a client, example below:
scp /path/to/fw.bin username@192.168.1.15:/tmp/fwupdate.bin
Then SSH into the AP and run the command below:
syswrapper.sh upgrade2 &