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Zigbee devices Curtains and blinds

Nova Digital EPJ-ZB

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

Vendor
Nova Digital
Model
EPJ-ZB
Type
Curtains and blinds
Power
battery: an end device, does not extend the mesh
Firmware updates (OTA)
no

Find it in shops: AliExpress

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What it exposes

FeaturePropertyValuesControl
Batterybattery% · 0…100read only
On / offstate—settable
Charge statecharge_state—read only
Manual modemanual_modeEnable, Disablesettable
FaultfaultNormal, None, Faultread only
Countdown timercountdowns · 10…90settable
Motor directionmotor_directionleft, rightsettable
Slow modeslow_mode—settable
Fixed window sashfixed_window_sashUp, Downsettable
Open window detectionwindow_detectionOpened, Closed, Pendingread 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:

{
  "battery": 87,
  "state": "OPEN",
  "charge_state": false,
  "manual_mode": "Enable",
  "fault": "Normal",
  "countdown": 50,
  "motor_direction": "left",
  "slow_mode": false,
  "fixed_window_sash": "Up",
  "window_detection": "Opened",
  "linkquality": 120
}

Send commands to zigbee2mqtt/my_device/set:

mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"state":"CLOSE"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"manual_mode":"Disable"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"motor_direction":"right"}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"slow_mode":true}'
mosquitto_pub -t zigbee2mqtt/my_device/set -m '{"fixed_window_sash":"Down"}'

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: "Open the curtains in the morning"
  mode: single
  triggers:
    - trigger: time
      at: "07:30:00"
  actions:
    - action: cover.open_cover
      target:
        entity_id: cover.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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