prefixkit Ask an engineerAsk Support RU

Zigbee devices Motion and presence sensors

Tuya ZT24

Human presence sensor (millimeter wave radar). Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Tuya
Model
ZT24
Type
Motion and presence sensors
Power
mains: usually a router that extends the mesh
Firmware updates (OTA)
no

Find it in shops: AliExpress

Links open a search in the shop; some are affiliate links: buying through them costs you nothing extra and supports this site. We do not sell devices or get them from manufacturers.

What it exposes

FeaturePropertyValuesControl
Presencepresence—read only
Distancedistancemread only
Illuminanceilluminancelxread only
Move sensitivitymove_sensitivity1…10settable
Presence sensitivitypresence_sensitivity1…10settable
Presence timeoutpresence_timeouts · 1…600settable
Detection distance maxdetection_distance_maxm · 0.75…9settable
On / offstate—settable
Living roomliving_room—settable
Bedroombedroom—settable
Bathroombathroom—settable
Sleepsleep—settable
Radar switchradar_switch—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:

{
  "presence": false,
  "distance": 0,
  "illuminance": 120,
  "move_sensitivity": 6,
  "presence_sensitivity": 6,
  "presence_timeout": 301,
  "detection_distance_max": 5,
  "state": false,
  "living_room": false,
  "bedroom": false,
  "bathroom": false,
  "sleep": false,
  "radar_switch": false,
  "linkquality": 120
}

Send commands to zigbee2mqtt/my_device/set:

mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"state":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"living_room":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"bedroom":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"bathroom":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"sleep":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: "Light on motion"
  mode: single
  triggers:
    - trigger: state
      entity_id: binary_sensor.my_device_presence
      to: "on"
  conditions:
    - condition: sun
      after: sunset
  actions:
    - action: light.turn_on
      target:
        entity_id: light.hallway

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.

Similar devices

Idea?