Smart Home Community > Tapo Smart Plug > Tapo P300 - After upgrade unable to connect with home assistant
< Tapo Smart Plug

Tapo P300 - After upgrade unable to connect with home assistant

Tapo P300 - After upgrade unable to connect with home assistant

Tapo P300 - After upgrade unable to connect with home assistant
Tapo P300 - After upgrade unable to connect with home assistant
2026-01-23 00:41:28 - last edited 3 hours ago
Model: Tapo P300  
Hardware Version: V1
Firmware Version: 1.4.2
Until today, I was running firmware 1.0.16 on my Tapo P300. Today I upgraded to version 1.4.2 and third party compatibility stopped working.
I updated 2 other devices and after disabling and reenabling this feature, they connected again.  But the p300 refuses to take that setting. 
I've tried like 20 times already the disable/enable step, no luck. Also tried disconnecting and plug-in again. No help. Disabling the device in home assistant just in case both services are competing and could be causing some issue.... nothing.
Is it possible to downgrade the firmware? Could it be a bug? Can I force somehow this setting only on this device? The app has a separate menu for that but it is for all the devices, nothing on the device itself.
Any help would be appreciated.
  0      
 
  0      
 
#1
Options
1 Accepted Solution
Re:Tapo P300 - After upgrade unable to connect with home assistant-Solution
2026-02-24 00:16:47 - last edited 3 hours ago

For anyone having this issue, it seems there's a bug with the app.

 

Copy paste of the solution found in a git issue of the python-kasa project:

  • connect tapo app to the same network of devices (same VLAN)
  • in app go to Profile - Third Party services
  • disable Third Party
  • enable Third Party

 

The key part is to have the phone in the same vlan, else it doesn't work.

Recommended Solution
  0  
  0  
#6
Options
6 Reply
Re:Tapo P300 - After upgrade unable to connect with home assistant
2026-01-26 02:03:16 - last edited 2026-01-26 02:04:05

  @Tritrimax 

 

Please note that the Home Assistant is not an officially supported third-party by Tapo, the Third‑party Compatibility feature does not guarantee functionality when used with non‑official platforms.

▶ CES 2026 Meet TP-Link AI Assistant and More New Products!
  0  
  0  
#2
Options
Re:Tapo P300 - After upgrade unable to connect with home assistant
2026-01-27 00:05:36

  @Wayne-TP Understood. But is there any way to downgrade? This firmware upgrade made my device unusable. I'd like to revert the version to a working one

  0  
  0  
#3
Options
Re:Tapo P300 - After upgrade unable to connect with home assistant
2026-01-28 06:15:09

Tritrimax wrote

  @Wayne-TP Understood. But is there any way to downgrade? This firmware upgrade made my device unusable. I'd like to revert the version to a working one

  @Tritrimax  Firmware downgrade is not supported either.

▶ CES 2026 Meet TP-Link AI Assistant and More New Products!
  0  
  0  
#4
Options
Re:Tapo P300 - After upgrade unable to connect with home assistant
2026-02-23 23:51:47

Would it be possible to send a bug report to your dev team?

It seems to me that the third party functionality is broken. It doesn't activate even if I enable it in the app. The encrypted protocol doesn't get disabled as expected.

  0  
  0  
#5
Options
Re:Tapo P300 - After upgrade unable to connect with home assistant-Solution
2026-02-24 00:16:47 - last edited 3 hours ago

For anyone having this issue, it seems there's a bug with the app.

 

Copy paste of the solution found in a git issue of the python-kasa project:

  • connect tapo app to the same network of devices (same VLAN)
  • in app go to Profile - Third Party services
  • disable Third Party
  • enable Third Party

 

The key part is to have the phone in the same vlan, else it doesn't work.

Recommended Solution
  0  
  0  
#6
Options
Re:Tapo P300 - After upgrade unable to connect with home assistant
Yesterday

  @Tritrimax thanks for the heads up about VLANs. Unlike the P100/110 switches, the P300 didn't change its config unless I was on the same VLAN.

  0  
  0  
#7
Options

Information

Helpful: 0

Views: 814

Replies: 6

About Us
Press
Copyright © TP-Link Systems Inc. All rights reserved.