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Zigbee devices Thermostats and radiator valves

Lytko L101Ze-SLN

Single channel thermostat without display. Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Lytko
Model
L101Ze-SLN
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
Climate (3)local_temperature, local_temperature_calibration, occupied_heating_setpoint, system_mode, running_moderoom temperature, local_temperature_calibration, heating setpoint, mode, running_modesettable
Identifyidentifyidentifysettable
Occupied setback (3)occupied_setback_3°C · 1…2.5settable
Remote sensing (3)remote_sensing_3internally, remotelysettable
Sensor (3)sensor_type_33.3K, 5.0K, 6.8K, 10.0K, 12.0K, 14.8K, 15.0K, 20.0K …settable

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:

{
  "local_temperature": 20.5,
  "occupied_heating_setpoint": 21,
  "system_mode": "heat",
  "occupied_setback_3": 2,
  "remote_sensing_3": "internally",
  "sensor_type_3": "3.3K",
  "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 '{"remote_sensing_3":"remotely"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"sensor_type_3":"5.0K"}'

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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