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97 lines
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97 lines
3.3 KiB
ReStructuredText
AS7341 Spectral Color Sensor
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============================
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.. seo::
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:description: Instructions for setting up AS7341 spectral color sensor.
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:image: as7341.jpg
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:keywords: AS7341
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The ``as7341`` sensor platform allows you to use your AS7341 spectral color sensor
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(`datasheet <https://ams.com/documents/20143/36005/AS7341_DS000504_3-00.pdf/5eca1f59-46e2-6fc5-daf5-d71ad90c9b2b>`__,
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`Adafruit`_) with ESPHome. The :ref:`I²C Bus <i2c>` is required to be set up in
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your configuration for this sensor to work.
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.. figure:: images/as7341-full.jpg
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:align: center
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:width: 50.0%
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AS7341 Spectral Color Sensor
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.. _Adafruit: https://www.adafruit.com/product/4698
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.. code-block:: yaml
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# Example configuration entry
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sensor:
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- platform: as7341
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f1:
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name: "415nm"
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f2:
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name: "445nm"
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f3:
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name: "480nm"
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f4:
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name: "515nm"
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f5:
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name: "555nm"
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f6:
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name: "590nm"
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f7:
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name: "630nm"
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f8:
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name: "680nm"
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clear:
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name: "Clear"
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nir:
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name: "NIR"
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Configuration variables
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-----------------------
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- **f1** (*Optional*): The reading for the 415nm channel. All options from :ref:`Sensor <config-sensor>`.
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- **f2** (*Optional*): The reading for the 445nm channel. All options from :ref:`Sensor <config-sensor>`.
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- **f3** (*Optional*): The reading for the 480nm channel. All options from :ref:`Sensor <config-sensor>`.
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- **f4** (*Optional*): The reading for the 515nm channel. All options from :ref:`Sensor <config-sensor>`.
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- **f5** (*Optional*): The reading for the 555nm channel. All options from :ref:`Sensor <config-sensor>`.
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- **f6** (*Optional*): The reading for the 590nm channel. All options from :ref:`Sensor <config-sensor>`.
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- **f7** (*Optional*): The reading for the 630nm channel. All options from :ref:`Sensor <config-sensor>`.
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- **f8** (*Optional*): The reading for the 680nm channel. All options from :ref:`Sensor <config-sensor>`.
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- **clear** (*Optional*): The reading for the clear channel. All options from :ref:`Sensor <config-sensor>`.
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- **nir** (*Optional*): The reading for the NIR (near-infrared) channel. All options from :ref:`Sensor <config-sensor>`.
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- **gain** (*Optional*): The gain used by the device. A higher gain may be more suitable for lower-light environments. Must be one of:
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- ``X0.5``
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- ``X1``
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- ``X2``
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- ``X4``
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- ``X8`` (*default*)
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- ``X16``
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- ``X32``
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- ``X64``
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- ``X128``
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- ``X256``
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- ``X512``
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- **astep** (*Optional*): The number of integration steps. Default is ``599``. Must be between ``0`` and ``65534``.
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- **atime** (*Optional*): The integration time per step in increments of 2.78µs. Default is ``29``. Must be between ``0`` and ``255``.
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- All other options for I²C devices described at :ref:`I²C Bus <i2c>`.
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Integration time
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----------------
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The integration time determines how long a channel measurement takes and depends on ``ATIME`` and ``ASTEP``. The formula for the total integration time is:
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.. math::
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\text{t} = \text{(ATIME + 1)} \times \text{(ASTEP + 1)} \times \text{2.78µS}
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See Also
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--------
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- :ref:`sensor-filters`
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- `Adafruit_AS7341 <https://github.com/adafruit/Adafruit_AS7341>`__
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- `SparkFun_AS7341X_Arduino_Library <https://github.com/sparkfun/SparkFun_AS7341X_Arduino_Library>`__
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- :apiref:`as7341/as7341.h`
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- :ghedit:`Edit`
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