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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
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.
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#1
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5 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.

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#2
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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

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#3
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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.

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#4
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Re:Tapo P300 - After upgrade unable to connect with home assistant
Monday

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.

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#5
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Re:Tapo P300 - After upgrade unable to connect with home assistant
Tuesday

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.

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#6
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