Home Assistant TP-Link Tapo Unsupported Device SMART.TAPOPLUG – How to Fix It

After updating TP-Link Tapo devices to firmware version 1.4.0 Build 251020 Rel. 161559, many Home Assistant users report that their TP-Link Tapo smart plugs no longer work. When trying to add or reconnect the device, Home Assistant shows the following error:

Home Assistant - TP Link: Unsupported device of type SMART.TAPOPLUG with encrypt_scheme
EncryptionScheme(is_support_https=false, encrypt_type='TPAP', http_port=80, lv=2)

Home Assistant - TP Link: Unsupported device of type SMART.TAPOPLUG with encrypt_scheme
EncryptionScheme(is_support_https=false, encrypt_type='TPAP', http_port=80, lv=2)

This issue affects the TP-Link Tapo integration in Home Assistant and typically appears immediately after the firmware update.

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What Causes the SMART.TAPOPLUG Error in Home Assistant?

With firmware version 1.4.0, TP-Link disables third-party compatibility by default.

As a result:

• Home Assistant can no longer communicate with the smart plug
• The device still responds in the local network
• Home Assistant marks the device as unsupported

This behavior is intentional and caused by a changed default setting in the TP-Link Tapo firmware – not a Home Assistant bug.

Fix: Enable TP-Link Tapo Third-Party Compatibility

You can fix the issue without downgrading firmware or reinstalling Home Assistant. The solution only requires enabling one option in the TP-Link Tapo app.

Step-by-Step Instructions

1. Open the TP-Link Tapo app
2. Tap “Me” in the bottom navigation bar
3. Scroll down to “Third-Party Services”
4. Enable “Third-Party Compatibility”

After a few seconds, Home Assistant will be able to access the smart plug again.
The device can now be added, reconnected, or controlled normally.

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Important Notes for Home Assistant Users

• Enabling third-party compatibility is required after the firmware update
• Existing devices do not need to be re-paired
  • Reloading the TP-Link integration may be sufficient
• The fix works for multiple TP-Link Tapo models, including:
  • Tapo P100
  • Tapo P110
• Local control via Home Assistant works reliably again after enabling the setting

Is This a Home Assistant Bug?

No.
The error “Unsupported device of type SMART.TAPOPLUG” is not caused by Home Assistant.

It is the result of:

• A firmware change by TP-Link
• Third-party access being disabled by default

Once third-party compatibility is enabled, the issue is resolved permanently.

Conclusion

If your TP-Link Tapo smart plug stopped working in Home Assistant after a firmware update, the solution is simple:

✅ Enable Third-Party Compatibility in the TP-Link Tapo app
❌ No firmware downgrade required
❌ No device reset necessary

With this setting enabled, Home Assistant and TP-Link Tapo work together again without issues.