Kasa plug sees Wi-Fi but cannot join the router

Start here

When the plug reaches router joining but fails, TP-Link points to Wi-Fi security/channel settings and unsupported captive/open networks—not a dead relay.

Check these first

• Enable 2.4 GHz.
• Avoid captive portal/open networks.
• Check WPA2/AES compatibility and router channel settings per TP-Link guidance.

Fix it in this order

1. Create/stabilize a compatible 2.4 GHz network.
2. Retry setup close to router.
3. After successful onboarding, test normal network configuration one change at a time.

Evidence to keep

• Router security/band
• Setup failure stage

Do not make it harder

• Disabling Wi-Fi security permanently
• Making five router changes at once

How you know it is fixed

• Plug joins and stays online on the intended secure network.

If the obvious fix does not work

1. If another Kasa device joins the same network, compare model/firmware and signal.
2. If none join, the router settings are more suspect.

If this still isn't resolved

1. Router/ISP or TP-Link Support

Sources for this path

Use these references to confirm provider-, model-, policy-, or jurisdiction-specific details before an irreversible step.

• TP-Link Kasa setup troubleshooting
• TP-Link Kasa reset guidance
• TP-Link Kasa and Alexa help

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This page solves one branch. The parent guide covers the full decision, edge cases, alternatives, and related checks.

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