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Zigbee devices Switches and relays

Mowe MW781Z

1 gang switch with scene and backlight. Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Mowe
Model
MW781Z
Type
Switches and relays
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
Countdown timercountdowns · 0…43200settable
After power losspower_on_behavioroff, previous, onsettable
Backlightbacklight_mode—settable
Indicator LEDindicator_modenone, relay, possettable
Switch modeswitch_modeswitch, scenesettable
Inching control setinching_control_set—read only
Action (button press)actionscene_1read 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",
  "countdown": 21600,
  "power_on_behavior": "off",
  "backlight_mode": false,
  "indicator_mode": "none",
  "switch_mode": "switch",
  "linkquality": 120
}

Send commands to zigbee2mqtt/my_device/set:

mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"state":"TOGGLE"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"power_on_behavior":"previous"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"backlight_mode":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"indicator_mode":"relay"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"switch_mode":"scene"}'

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: "Off at night"
  mode: single
  triggers:
    - trigger: time
      at: "23:30:00"
  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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