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Zigbee devices Smart plugs with energy metering

Tuya SMKG-2KNL-SD

Smart leakage protector 63a with leakage monitoring. Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Tuya
Model
SMKG-2KNL-SD
Type
Smart plugs with energy metering
Power
mains: usually a router that extends the mesh
Firmware updates (OTA)
no

Find it in shops: AliExpress

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What it exposes

FeaturePropertyValuesControl
On / offstate—settable
VoltagevoltageVread only
CurrentcurrentAread only
PowerpowerWread only
EnergyenergykWhread only
Temperaturetemperature°Cread only
Leakage currentleakage_currentmAread only
Over voltage thresholdover_voltage_thresholdV · 220…265settable
Under voltage thresholdunder_voltage_thresholdV · 76…240settable
Over current thresholdover_current_thresholdA · 1…63settable
Leakage thresholdleakage_thresholdmA · 10…100settable
Temp thresholdtemp_threshold°C · 40…150settable
Faultsfaults—read only

MQTT: state and commands

Zigbee2MQTT publishes the device state to zigbee2mqtt/my_device (my_device is the name you give the device). An example message:

{
  "state": "ON",
  "voltage": 230,
  "current": 0.06,
  "power": 12.4,
  "energy": 3.21,
  "temperature": 21.6,
  "leakage_current": 0,
  "over_voltage_threshold": 243,
  "under_voltage_threshold": 158,
  "over_current_threshold": 32,
  "leakage_threshold": 55,
  "temp_threshold": 95,
  "linkquality": 120
}

Send commands to zigbee2mqtt/my_device/set:

mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"state":"TOGGLE"}'

Watch the topics live from the browser: MQTT client.

Home Assistant automation example

Zigbee2MQTT creates Home Assistant entities from the device name. If it is called my_device, an automation in automations.yaml can look like this:

- alias: "Turn off when idle"
  mode: single
  triggers:
    - trigger: numeric_state
      entity_id: sensor.my_device_power
      below: 2
      for: "00:15:00"
  actions:
    - action: switch.turn_off
      target:
        entity_id: switch.my_device

Check the YAML: YAML checker.

How to pair it

  1. In Zigbee2MQTT click Permit join.
  2. Put the device in pairing mode: usually a long press of the reset button (5–10 s) until the LED blinks; bulbs: switch the power off and on 5–6 times.
  3. Keep the device close to the coordinator or a router while pairing.
  4. Give it a clear name: MQTT topics and Home Assistant entities are built from it.

Exact procedure and model notes: the device page in the Zigbee2MQTT docs. No coordinator yet: coordinator picker.

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