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Zigbee devices Switches and relays

Manhot MH03-4Z-OLED

OLED Screen Switch 4 Gang. Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Manhot
Model
MH03-4Z-OLED
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 / off (l1)state_l1—settable
On / off (l2)state_l2—settable
On / off (l3)state_l3—settable
On / off (l4)state_l4—settable
Countdown timercountdown_1s · 0…43200settable
Countdown timercountdown_2s · 0…43200settable
Countdown timercountdown_3s · 0…43200settable
Countdown timercountdown_4s · 0…43200settable
Child lockchild_lock—settable
Backlight switchbacklight_switch—settable
Backlight lightnessbacklight_lightness1…100settable
Displayoff delaydisplayoff_delays · 10…180settable
Relay statusrelay_statusoff, on, memorysettable
Light modelight_modenone, relay, possettable
On coloron_colorred, orange, green, cyan, blue, purple, magenta, cold_white …settable
Off coloroff_colorred, orange, green, cyan, blue, purple, magenta, cold_white …settable
Sw1 namesw1_name—settable
Sw2 namesw2_name—settable
Sw3 namesw3_name—settable
Sw4 namesw4_name—settable
Press on funpress_on_fundisable, press_switch_1, press_switch_2, press_switch_3, press_switch_4settable
Press off funpress_off_fundisable, press_switch_1, press_switch_2, press_switch_3, press_switch_4settable

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_l1": "ON",
  "state_l2": "ON",
  "state_l3": "ON",
  "state_l4": "ON",
  "countdown_1": 21600,
  "countdown_2": 21600,
  "countdown_3": 21600,
  "countdown_4": 21600,
  "child_lock": false,
  "backlight_switch": false,
  "backlight_lightness": 51,
  "displayoff_delay": 95,
  "relay_status": "off",
  "light_mode": "none",
  "linkquality": 120
}

Send commands to zigbee2mqtt/my_device/set:

mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"state_l1":"TOGGLE"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"state_l2":"TOGGLE"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"state_l3":"TOGGLE"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"state_l4":"TOGGLE"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"child_lock":true}'

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_l1

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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