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73 lines
3.0 KiB
ReStructuredText
73 lines
3.0 KiB
ReStructuredText
SHT4X Temperature and Humidity Sensor
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=====================================
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.. seo::
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:description: Instructions for setting up SHT4X temperature and humidity sensor
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:image: sht4x.jpg
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The ``sht4x`` sensor platform allows you to use your SHT4X temperature and humidity sensor
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(`datasheet <https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/2_Humidity_Sensors/Datasheets/Sensirion_Humidity_Sensors_SHT4x_Datasheet.pdf>`__, `Adafruit`_) with ESPHome.
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The :ref:`I²C Bus <i2c>` is required to be set up in your configuration for this sensor to work.
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.. figure:: images/sht4x-full.jpg
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:align: center
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:width: 80.0%
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.. _Adafruit: https://www.adafruit.com/product/4885
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.. code-block:: yaml
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sensor:
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- platform: sht4x
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temperature:
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name: "Temperature"
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humidity:
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name: "Relative Humidity"
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Configuration variables:
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------------------------
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- **temperature** (*Optional*): Temperature.
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- **name** (**Required**, string): The name of the sensor.
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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
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- All other options from :ref:`Sensor <config-sensor>`.
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- **humidity** (*Optional*): Relative Humidity.
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- **name** (**Required**, string): The name of the sensor.
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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
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- All other options from :ref:`Sensor <config-sensor>`.
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- **precision** (*Optional*, string): The measurement precision, either ``High``, ``Med`` or ``Low``. Default is ``High``.
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- **heater_max_duty** (*Optional*, float): The maximum duty cycle of the heater (limited to ``0.05``). Default is ``0.0``, i.e. heater off.
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- **heater_power** (*Optional*, string): The heater power, either ``High``, ``Med`` or ``Low``. Default is ``High``.
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- **heater_time** (*Optional*, string): The length of time to run the heater, either ``Long`` (1000ms) or ``Short`` (100ms). Default is ``Long``.
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- **address** (*Optional*, int): Manually specify the I²C address of the sensor. Default is ``0x44``.
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- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the sensor. Defaults to ``60s``.
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Heater Configuration:
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---------------------
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The SHT4X includes an on-chip heater which is intended to remove condensation from the sensor that
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has been sprayed onto the sensor or in high humidity environments. This can help
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maintain accurate humidity measurements.
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The heater can be enabled by setting ``heater_max_duty`` up to a maximum duty cycle
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of ``5%`` (``0.05``). This runs the heater on a regular interval. While the heater
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is in operation the sensor disables measurements so no updates will be published.
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See the (`datasheet <https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/2_Humidity_Sensors/Datasheets/Sensirion_Humidity_Sensors_SHT4x_Datasheet.pdf>`__)
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for more information about heater operation.
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See Also
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--------
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- :doc:`/components/sensor/sht3xd`
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- :doc:`/components/sensor/shtcx`
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- :ref:`sensor-filters`
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- :doc:`absolute_humidity`
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- :apiref:`sht4x/sht4x.h`
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- :ghedit:`Edit`
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