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SONOFF SNZB-04 #

Model	SNZB-04
Vendor	SONOFF
Description	Contact sensor
Exposes	contact, battery_low, battery, voltage, linkquality
Picture
White-label	eWeLink RHK06

Notes #

Pairing #

Long press reset button for 5s until the LED indicator flashes three times, which means the device has entered pairing mode

Exposes #

Contact (binary) #

Indicates if the contact is closed (= true) or open (= false). Value can be found in the published state on the contact property. It’s not possible to read (/get) or write (/set) this value. If value equals false contact is ON, if true OFF.

Battery_low (binary) #

Indicates if the battery of this device is almost empty. Value can be found in the published state on the battery_low property. It’s not possible to read (/get) or write (/set) this value. If value equals true battery_low is ON, if false OFF.

Battery (numeric) #

Remaining battery in %. Value can be found in the published state on the battery property. It’s not possible to read (/get) or write (/set) this value. The minimal value is 0 and the maximum value is 100. The unit of this value is %.

Voltage (numeric) #

Voltage of the battery in millivolts. Value can be found in the published state on the voltage property. It’s not possible to read (/get) or write (/set) this value. The unit of this value is mV.

Linkquality (numeric) #

Link quality (signal strength). Value can be found in the published state on the linkquality property. It’s not possible to read (/get) or write (/set) this value. The minimal value is 0 and the maximum value is 255. The unit of this value is lqi.

Manual Home Assistant configuration #

Although Home Assistant integration through MQTT discovery is preferred, manual integration is possible with the following configuration:

binary_sensor:
  - platform: "mqtt"
    state_topic: "zigbee2mqtt/<FRIENDLY_NAME>"
    availability_topic: "zigbee2mqtt/bridge/state"
    value_template: "{{ value_json.contact }}"
    payload_on: false
    payload_off: true
    device_class: "door"

binary_sensor:
  - platform: "mqtt"
    state_topic: "zigbee2mqtt/<FRIENDLY_NAME>"
    availability_topic: "zigbee2mqtt/bridge/state"
    value_template: "{{ value_json.battery_low }}"
    payload_on: true
    payload_off: false
    device_class: "battery"

sensor:
  - platform: "mqtt"
    state_topic: "zigbee2mqtt/<FRIENDLY_NAME>"
    availability_topic: "zigbee2mqtt/bridge/state"
    value_template: "{{ value_json.battery }}"
    unit_of_measurement: "%"
    device_class: "battery"
    state_class: "measurement"

sensor:
  - platform: "mqtt"
    state_topic: "zigbee2mqtt/<FRIENDLY_NAME>"
    availability_topic: "zigbee2mqtt/bridge/state"
    value_template: "{{ value_json.voltage }}"
    unit_of_measurement: "mV"
    device_class: "voltage"
    enabled_by_default: false
    state_class: "measurement"

sensor:
  - platform: "mqtt"
    state_topic: "zigbee2mqtt/<FRIENDLY_NAME>"
    availability_topic: "zigbee2mqtt/bridge/state"
    value_template: "{{ value_json.linkquality }}"
    unit_of_measurement: "lqi"
    enabled_by_default: false
    icon: "mdi:signal"
    state_class: "measurement"