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Zigbee devices Thermostats and radiator valves

Namron 540139X

Panel heater 400/600/800/1000 W. Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Namron
Model
540139X
Type
Thermostats and radiator valves
Power
mains: usually a router that extends the mesh
Firmware updates (OTA)
yes, through Zigbee2MQTT

Find it in shops: AliExpress

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What it exposes

FeaturePropertyValuesControl
PowerpowerWread only
CurrentcurrentAread only
VoltagevoltageVread only
EnergyenergykWhread only
Climateoccupied_heating_setpoint, local_temperature, system_mode, local_temperature_calibration, running_stateheating setpoint, room temperature, mode, local_temperature_calibration, running statesettable
Child lockchild_lock—settable
Hysterersishysterersis°C · 0.5…2settable
Display brightnesssdisplay_brightnesss1…7settable
Display auto offdisplay_auto_offdeactivated, activatedsettable
Power up statuspower_up_statusmanual, last_statesettable
Open window detectionwindow_detection—settable
Window openwindow_open—read only
Temperature display modetemperature_display_modecelsius, fahrenheitsettable

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:

{
  "power": 12.4,
  "current": 0.06,
  "voltage": 230,
  "energy": 3.21,
  "occupied_heating_setpoint": 21,
  "local_temperature": 20.5,
  "system_mode": "heat",
  "child_lock": false,
  "hysterersis": 1,
  "display_brightnesss": 4,
  "display_auto_off": "deactivated",
  "power_up_status": "manual",
  "window_detection": false,
  "window_open": false,
  "linkquality": 120
}

Send commands to zigbee2mqtt/my_device/set:

mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"occupied_heating_setpoint":21.5}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"system_mode":"heat"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"child_lock":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"display_auto_off":"activated"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"power_up_status":"last_state"}'

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: "Cooler at night"
  mode: single
  triggers:
    - trigger: time
      at: "23:00:00"
  actions:
    - action: climate.set_temperature
      target:
        entity_id: climate.my_device
      data:
        temperature: 18

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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