Background:

My predecessor had installed UAP LR around the premise but it was never registered to the controller. In the admin portal, during the registration/ adoption period, the AP will keep on cycling through the update process indefinitely.

The UAP LR in Red is stuck on version 3.2 while the green one was updated and adopted successfully

Had to use the default ip address 192.168.1.20 and the default credential "ubnt" and "ubnt" to transfer the bin file via WinSCP to /tmp/fwupdate.bin and then ran "upgrade /tmp/fwupdate.bin". Once the device as on v3.9.27, then the Ubiquiti controller recognized it and updated it to 4.3 and was able to register into the environment

Upgrading UAP LR

1. Reset/ Default the UAP LR device by pressing and holding down the "reset" button

2. Upon successful reset, the default ip address is 192.168.1.20

3. Configure your laptop to the same network as the default address

4. Download Putty and a WinSCP sever software

5. SSH to the UAP LR with its' default ip address and default credential
   a. Username is "ubnt" and password is "ubnt"

6. Download the bin file v3.9.27 from Ubiquiti repository

7. Transfer the bin file via WinSCP to /tmp/fwupdate.bin

8. Run the command from Putty, "upgrade /tmp/fwupdate.bin"

9. Once the device reboots and successfully display v3.9.27, then it is able to be adopt and upgrade by the controller