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Wi-Fi Setup Failed

TP-Link Kasa Smart Plug

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

Kasa Smart Plug Wi-Fi Setup Failed — Fix

Note: This issue may not appear as a code on your device's display. This page helps you troubleshoot the underlying problem.

What Does This Error Mean?

Kasa smart plug setup failing to connect is usually caused by the plug trying to join a 5 GHz Wi-Fi band instead of 2.4 GHz, a typo in the Wi-Fi password, or the phone being too far from the plug during setup. Set up within 1 metre of the plug.

How to Fix It

  1. Set up within 1 metre of the Kasa plug

  2. Use the 2.4 GHz Wi-Fi band

  3. Double-check the Wi-Fi password

  4. Forget and rejoin the plug hotspot

  5. Disable mobile data during setup

  6. Factory reset the plug and try again

Frequently Asked Questions

Kasa app says setup successful but plug still shows as offline — cause?

A setup-success message with an offline status means the plug connected to the Kasa setup server but failed to connect to your home Wi-Fi. Re-enter the Wi-Fi credentials in the Kasa app or reset the plug and try setup again.

Kasa plug setup fails only on my iPhone but works on an Android phone — why?

iOS handles Wi-Fi handoffs differently to Android during smart home device setup. On iPhone, go to Settings > Wi-Fi, connect manually to the Kasa_TP setup hotspot, then return to the Kasa app to continue setup rather than letting the app do the hotspot connection automatically.

My Wi-Fi password has special characters — could that cause Kasa setup to fail?

Special characters in Wi-Fi passwords (!, @, #, spaces) are generally supported by Kasa plugs. However, if setup consistently fails with a complex password, try creating a temporary simple password on your router for the setup, then restore the complex password afterwards.