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TP-Link
TP-Link

Kasa Smart Plug Slim KP125M

SKU KP125M

A 15A Matter smart plug with energy monitoring in a slim body that leaves the neighboring outlet free. Home Assistant reads power and switches it locally through the TP-Link integration, or over Matter.

Works on integrations
Protocols
Setup guides
On the supported list for the Home Assistant tplink integration, which polls locally every 5 seconds with no cloud round trip and reports real time power plus consumption history for the energy dashboard. 15A and 1800W max, 2.4GHz Wi-Fi only, so count one access point client per plug when you scale a floor. Onboard it in the Kasa app first; current firmware authenticates local access with your TP-Link cloud email and password, which the integration asks for during setup and treats as case sensitive. Matter commissioning is the alternative if the plug must also answer to Apple Home or SmartThings, but the tplink integration stays the fuller path for energy history.

Entities in Home Assistant

Typical 8 entities via Matter

This model has no device dump in Home Assistant's test suite, so the list below is what a Matter On/Off Plug-in Unit exposes at minimum. Optional features the manufacturer implements add entities on top.

Primary entities 1 What automations and dashboards use.
EntityTypeDevice classUnit
Switch (main)switchoutlet—
Configuration 6 Settings exposed as entities, tunable from Home Assistant.
EntityTypeDevice classUnit
Off transition timenumber—s
On levelnumber——
On transition timenumber—s
On/Off transition timenumber—s
Power-on levelnumber——
Power-on behaviorselect——
Diagnostics 1 Health and troubleshooting values, hidden from dashboards by default.
EntityTypeDevice classUnit
Identifybuttonidentify—

Derived from Home Assistant 2026.8.3: the entities every reference implementation of a Matter On/Off Plug-in Unit produced in core's own tests. A floor, not the full list for this model.

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