Hi  @Zoltan83 

Thank you so much for taking the time to post the issue on TP-Link community!

To better assist you, I've created a support ticket via your registered email address, and escalated it to our support engineer to look into the issue. The ticket ID is TKID240525801, please check your email box and ensure the support email is well received. Thanks!

Once the issue is addressed or resolved, welcome to update this topic thread with your solution to help others who may encounter the same issue as you did.

Many thanks for your great cooperation and patience!

Zoltan83 wrote

Hi,

 

I try to upgrade 1-1 device at 1-1 site, but the upgrade process is failed.

- The controllers: 2x Omada Hardware Controller OC200 v1 with Fw 1.29.4 Build 20240304 Rel.54362, Controller ver:  5.13.30.20

- The APs: 2x EAP225-Outdoor v1 - Fw 5.1.1
 

The update process begin, and nothing happened for minutes... and later [Failed]Failed to upgrade [Name of AP] to firmware version 5.1.1 Build 20230921 Rel. 63318 online.
[Name of AP] was disconnected.

The APs can not reboot, the network link does not come up, it is bricked...
Now we have 2 bricked device because there is bug somewhere in the upgrade process with this configuration build.
1 AP was worked from own POE adapter, 1 AP was worked from a TP-Link T1600G-28PS v3 POE switch, so I don't think this was the problem.
Other APs like EAP-225 V3 (indoor) upgraded to Fw 5.1.6 without any issue.