🟢 How to Fix: Kasa Smart Plug Offline

Follow these steps in order. Most Kasa users fix the issue by step 3.

• Step 1: Unplug the Kasa device, wait 10 seconds, plug back in. Open the Kasa app — it should show online within 30 seconds if WiFi is working.
• Step 2: Check your router's 2.4GHz band is active. Kasa devices do not support 5GHz WiFi and will fail silently if only 5GHz is broadcasting.
• Step 3: Open the Kasa app → Device Settings → check the last online timestamp. If hours ago, the issue started when your router restarted or changed IP assignments.
• Step 4: Assign a static IP to the Kasa device in your router's DHCP settings. IP changes after router reboots cause Kasa devices to go offline temporarily.
• Step 5: For Kasa devices offline after a router change: hold the reset button for 5 seconds until the LED flashes amber/green alternately, then set up again.
• Step 6: If using with Alexa or Google Home: unlink the TP-Link Kasa skill and re-link it. Re-discover devices with "Alexa, discover devices".

Kasa Smart Plug going offline is one of the most common smart home problems — searched 7,800 times every month. The most frequent causes are WiFi signal strength, cloud server outages on the manufacturer's end, firmware updates applied overnight, or the device losing its IP address after a router restart.

• WiFi signal drop: Smart devices need a minimum -65 dBm signal. Use our WiFi Checker tool to test your signal strength at the device location.
• Cloud outage: Kasa's servers can go down. Check the manufacturer's status page before spending time on local troubleshooting.
• Firmware update: Manufacturers push updates overnight. These sometimes break connectivity temporarily. Wait 24 hours before assuming hardware failure.
• IP address change: If your router restarted, the device may have a new IP. A power cycle of the device usually resolves this automatically.