Kasa TPlink integration wont authenticate

r_lesh · February 27, 2026, 4:44pm

After trying other suggestions, this worked for me

Phong94 · March 4, 2026, 9:31pm

This resolved it for me…thanks!!

gustavodinosaurio · March 24, 2026, 9:33pm

Thanks! This worked for me. I had to connect my device to a diferent wi-fi and that’s what it broke it in the first place. This fix was super easy.

codybr · April 12, 2026, 5:43am

This Authentication error can be caused by migrating Kasa devices onto a new wireless network which is managed by the TP-Link DECO app. That app apparently turns off the Third-party Compatibility feature when it finds TP-Link smart devices on the network. Load the Tapo app (Kasa app won’t work) and turn the Third-party Compatibility switch back on. Wait a few minutes and then go back into the Home Assitant TP-Link integration and re-enter the login info for each broken device.

EcN · April 14, 2026, 7:08am

I installed the tapo app successfully, saw the problem device linked, but the third party compatibility was already switched on. I also tried toggling.

Just want to add that adding the device manually instead of discovery worked for me.