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Zigbee devices Motion and presence sensors

Bacchus Presence_Sensor_v2.6

Bacchus presence sensor with illuminance. Works with Zigbee2MQTT with no vendor hub or cloud: it pairs with a Zigbee stick and shows up in Home Assistant.

Vendor
Bacchus
Model
Presence_Sensor_v2.6
Type
Motion and presence sensors
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
Motion (1)occupancy_1—read only
Illuminanceilluminancelxread only
Target distancetarget_distancecmread only
Target typetarget_typeNone, Moving, Stationary, Moving and stationaryread only
Local timelocal_time—read only
Led mode (3)led_mode_3Always, Never, Nightsettable
Illuminance thresholdilluminance_thresholdraw · 0…50000settable
Measurement periodmeasurement_periodsec · 0…30settable
Min timemin_time—settable
Max timemax_time—settable
Sensor (1)sensor_1—settable
Day output (2)day_output_2—read only
Night output (3)night_output_3—read 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:

{
  "occupancy_1": false,
  "illuminance": 120,
  "target_distance": 0,
  "target_type": "None",
  "led_mode_3": "Always",
  "illuminance_threshold": 25000,
  "measurement_period": 15,
  "sensor_1": false,
  "day_output_2": false,
  "night_output_3": false,
  "linkquality": 120
}

Send commands to zigbee2mqtt/my_device/set:

mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"led_mode_3":"Never"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"sensor_1":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_occupancy
      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.

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