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Zigbee devices Switches and relays

Nous L14

Smart water valve. Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Nous
Model
L14
Type
Switches and relays
Power
battery: an end device, does not extend the mesh
Firmware updates (OTA)
yes, through Zigbee2MQTT

Find it in shops: AliExpress

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What it exposes

FeaturePropertyValuesControl
On / offstate—settable
Statusstatusoff, on_auto, button_locked, on_manual_app, on_manual_buttonread only
Refreshrefreshrefreshsettable
Countdown timercountdownmin · 1…240settable
On with countdownon_with_countdownmin · 1…240settable
Countdown timercountdown_leftmin · 0…240read only
Single watering durationsingle_watering_durationsread only
Flow switchflow_switch—settable
Quantitative wateringquantitative_wateringgal · 1…10000settable
Single watering amountsingle_watering_amountgalread only
Surplus flowsurplus_flowgalread only
Water currentwater_currentgal/minread only
Water totalwater_totalgalread only
Water total resetwater_total_resetresetsettable
Faultfault—read only
Child lockchild_lock—settable
Batterybattery% · 0…100read 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",
  "status": "off",
  "refresh": "refresh",
  "countdown": 121,
  "on_with_countdown": 121,
  "countdown_left": 120,
  "single_watering_duration": 0,
  "flow_switch": false,
  "quantitative_watering": 5001,
  "single_watering_amount": 0,
  "surplus_flow": 0,
  "water_current": 0,
  "water_total": 0,
  "water_total_reset": "reset",
  "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 '{"flow_switch":true}'
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

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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