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HS300 Device not connecting to Home Assistant

HS300 Device not connecting to Home Assistant

HS300 Device not connecting to Home Assistant
HS300 Device not connecting to Home Assistant
2025-10-20 02:35:48
Model: HS300  
Hardware Version: V2
Firmware Version: 1.1.2

I've been a loyal Kasa user for years now. I recently picked up another HS300 as I needed to replace a KP303 that I have tied in for Automations with Home Assistant. I seem to be having an issue where I keep getting the following when trying to connect and login to the device. "Unable to authenticate: Device response did not match our challenge on ip 10.1.x.x, check that your e-mail and password (both case-sensitive) are correct." I have confirmed they are 100% correct as I can log into the web portal just fine. 

Reading it says I can uninstall and reinstall but I simply cannot accept that as an answer and have to rebuild 10's of my Automations, also I don't want to rely on the cloud access to the devices for my local Automations as I segment my IoT VLAN to not have any internet based access for security. Is there a way to get this working?


I'd really appreciate any assistance.

 
 
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#1
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3 Reply
Re:HS300 Device not connecting to Home Assistant
2025-10-22 09:08:07

  @Milhouz 

 

There is a Third-Party Compatibility switch in the Kasa app, you can try to enable this feature, see if that helps with your case. Frequently asked questions about the "Third-Party Compatibility" feature

 

Please note that Home Assistant is not a supported third party by Kasa. The Third-Party Compatibility feature cannot guarantee that the product will function properly on unofficial third-party platforms.

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#2
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Re:HS300 Device not connecting to Home Assistant
Tuesday

  @Milhouz I had a similar situation and it took a while to find a resolution.  If you are still having trouble, I explained everything in this thread.  To sum up, here is what fixed it for me. 

 

 

  • Remove the device from Home Assistant (three dots -> Delete) 
  • Factory reset the device (hold down reset button for 5 seconds)
  • Re-add the device to the network using TP-Link app
  • Restart Home Assistant

 

After you restart Home Assistant, it should find the power strip and want to re-add it with the usual local connection rather than asking for cloud credentials.  HA should recognize the device and reassociate all your existing automations back to it.  

 

Hopefully this helps.  

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#3
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Re:HS300 Device not connecting to Home Assistant
Wednesday

  @Milhouz just ran in to the same exact issue and error message tonight.

1) ignore the discovered device

2) go to the TP-Link Smart Home configured integration

3) select the blue "Add Entry" and enter the device IP address (may need to go through your router to obtain this).

4) it will prompt you to assign the plug(s) to an area. 

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#4
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