Xiaomi ZNCZ02LM

Model	ZNCZ02LM
Vendor	Xiaomi
Description	Mi smart plug
Exposes	switch (state), power, energy, device_temperature, power_outage_memory, linkquality
Picture

Notes

Pairing

Press and hold the button on the device for +- 10 seconds (until the blue light starts blinking and stops blinking), release and wait.

You may have to unpair the switch from an existing coordinator before the pairing process will start. If you can't do this, try to remove battery (if it has one), push the button (to completely discharge device), place the battery back and try pairing again.

Power outage memory

This option allows the device to restore the last on/off state when it's reconnected to power. To set this option publish to zigbee2mqtt/FRIENDLY_NAME/set payload {"power_outage_memory": true} (or false). Now toggle the plug/switch once with the button on it, from now on it will restore its state when reconnecting to power.

Voltage

Some versions of the plug provide voltage. This depends on the firmware on the device. Confirmed working are the ones with dateCode 02-28-2017 (can be checked in data/database.db). Note that Xiaomi doesn't provide firmware files, so the software cannot be downgraded/upgraded.

OTA updates

This device supports OTA updates, for more information see OTA updates.

Options

How to use device type specific configuration

• power_calibration: Calibrates the power value (percentual offset), takes into effect on next report of device. The value must be a number.

• power_precision: Number of digits after decimal point for power, takes into effect on next report of device. This option can only decrease the precision, not increase it. The value must be a number with a minimum value of 0 and with a with a maximum value of 3

• energy_calibration: Calibrates the energy value (percentual offset), takes into effect on next report of device. The value must be a number.

• energy_precision: Number of digits after decimal point for energy, takes into effect on next report of device. This option can only decrease the precision, not increase it. The value must be a number with a minimum value of 0 and with a with a maximum value of 3

• device_temperature_calibration: Calibrates the device_temperature value (absolute offset), takes into effect on next report of device. The value must be a number.

• state_action: State actions will also be published as 'action' when true (default false). The value must be true or false

Exposes

Switch

The current state of this switch is in the published state under the state property (value is ON or OFF). To control this switch publish a message to topic zigbee2mqtt/FRIENDLY_NAME/set with payload {"state": "ON"}, {"state": "OFF"} or {"state": "TOGGLE"}. To read the current state of this switch publish a message to topic zigbee2mqtt/FRIENDLY_NAME/get with payload {"state": ""}.

On with timed off

When setting the state to ON, it might be possible to specify an automatic shutoff after a certain amount of time. To do this add an additional property on_time to the payload which is the time in seconds the state should remain on. Additionnaly an off_wait_time property can be added to the payload to specify the cooldown time in seconds when the switch will not answer to other on with timed off commands. Support depend on the switch firmware. Some devices might require both on_time and off_wait_time to work Examples : {"state" : "ON", "on_time": 300}, {"state" : "ON", "on_time": 300, "off_wait_time": 120}.

Power (numeric)

Instantaneous measured power. Value can be found in the published state on the power property. To read (/get) the value publish a message to topic zigbee2mqtt/FRIENDLY_NAME/get with payload {"power": ""}. It's not possible to write (/set) this value. The unit of this value is W.

Energy (numeric)

Sum of consumed energy. Value can be found in the published state on the energy property. It's not possible to read (/get) or write (/set) this value. The unit of this value is kWh.

Device temperature (numeric)

Temperature of the device. Value can be found in the published state on the device_temperature property. It's not possible to read (/get) or write (/set) this value. The unit of this value is °C.

Power outage memory (binary)

Enable/disable the power outage memory, this recovers the on/off mode after power failure. Value can be found in the published state on the power_outage_memory property. To read (/get) the value publish a message to topic zigbee2mqtt/FRIENDLY_NAME/get with payload {"power_outage_memory": ""}. To write (/set) a value publish a message to topic zigbee2mqtt/FRIENDLY_NAME/set with payload {"power_outage_memory": NEW_VALUE}. If value equals true power outage memory is ON, if false OFF.

Linkquality (numeric)

Link quality (signal strength). Value can be found in the published state on the linkquality property. It's not possible to read (/get) or write (/set) this value. The minimal value is 0 and the maximum value is 255. The unit of this value is lqi.