103 lines
4.6 KiB
ReStructuredText
103 lines
4.6 KiB
ReStructuredText
TCS34725 RGB Color Sensor
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=========================
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.. seo::
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:description: Instructions for setting up TCS34725 RGB color sensors.
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:image: tcs34725.jpg
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:keywords: tcs34725
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The ``tcs34725`` sensor platform allows you to use your TCS34725 RGB color sensors
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(`datasheet <https://cdn-shop.adafruit.com/datasheets/TCS34725.pdf>`__,
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`Adafruit`_), color temperature and illuminance sensors with ESPHome. The :ref:`I²C <i2c>` is
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required to be set up in your configuration for this sensor to work.
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Note: If the `integration_time` is set too long for the light conditions, the sensor will overexpose.
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In this case the sensor may not show 100% on its clear channel. With an `integration_time` of `614ms`
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and a `gain` of `1x` the sensor will max out at around 4100 lx. In this case the individual color
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channels will show `100%`, the clear channel `25%`. The illumination in lux is shown as `0` as well
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as the color temperature in kelvin will show `0`.
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.. figure:: images/tcs34725-full.jpg
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:align: center
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:width: 50.0%
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TCS34725 RGB Color Sensor
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.. _Adafruit: https://www.adafruit.com/product/1334
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.. figure:: images/tcs34725-ui.png
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:align: center
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:width: 80.0%
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.. code-block:: yaml
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# Example configuration entry
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sensor:
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- platform: tcs34725
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red_channel:
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name: "TCS34725 Red Channel"
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green_channel:
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name: "TCS34725 Green Channel"
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blue_channel:
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name: "TCS34725 Blue Channel"
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clear_channel:
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name: "TCS34725 Clear Channel"
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illuminance:
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name: "TCS34725 Illuminance"
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color_temperature:
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name: "TCS34725 Color Temperature"
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glass_attenuation_factor: 1.0
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address: 0x29
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update_interval: 60s
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Configuration variables:
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------------------------
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- **red_channel** (*Optional*): Value of the red color channel relative to the clear channel, as a percentage.
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All options from :ref:`Sensor <config-sensor>`.
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- **green_channel** (*Optional*): Value of the green color channel relative to the clear channel, as a percentage.
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All options from :ref:`Sensor <config-sensor>`.
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- **blue_channel** (*Optional*): Value of the blue color channel relative to the clear channel, as a percentage.
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All options from :ref:`Sensor <config-sensor>`.
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- **clear_channel** (*Optional*): Value of the clear (without a color filter) channel, relative to the maximum value for
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the chosen integration time. All options from :ref:`Sensor <config-sensor>`.
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- **illuminance** (*Optional*): Get the total illuminance of the sensor in lx.
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- **color_temperature** (*Optional*): Get the calculated color temperature of the light in Kelvin.
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- **gain** (*Optional*): Set the gain for the internal ADCs to work better in certain low-light conditions. Valid
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values are ``1x`` (default), ``4x``, ``16x``, ``60x`` (highest gain). Will be overwritten if auto integration time
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is used
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- **integration_time** (*Optional*): The amount of time the light sensor is exposed. Valid values are
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``auto`` (default), ``2.4ms``, ``24ms``, ``50ms``, ``101ms``, ``120ms``, ``154ms``, ``180ms``, ``199ms``,
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``240ms``, ``300ms``, ``360ms``, ``401ms``, ``420ms``, ``480ms``, ``499ms``, ``540ms``, ``600ms``, ``614ms``.
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- **glass_attenuation_factor** (*Optional*): The attenuation factor of glass if it's behind some glass facia.
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Default is ``1.0`` means ``100%`` transmissivity. ``2`` means ``50%`` transmissivity etc.
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- **address** (*Optional*, int): Manually specify the I²C address of the sensor. Defaults to ``0x29``.
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- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the
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sensor. Defaults to ``60s``.
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For many applications, you can use AUTO timing or leave integration time empty to have the ESP select a suitable gain
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setting based on the previous measurement. If light levels change dramatically this may cause the next reading to saturate,
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after which the gain will adjust down and subsequent readings will be in range.
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If auto is used in a dynamic environment an update rate of 1 second is best. Filters can be used to throttle the output and
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prevent updates of marginal changes like:
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.. code-block:: yaml
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illuminance:
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name: "TCS34725 Illuminance"
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filters:
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- or:
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- delta: 50
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- throttle: 60sec
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When using integration times lower than 154ms the accuracy of the sensor drops with no further gain in possible light
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accumulation. Use faster timings only if fast readout is necessary with stable light conditions recommended.
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See Also
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--------
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- :ref:`sensor-filters`
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- `TCS34725 library <https://github.com/adafruit/Adafruit_TCS34725>`__ by `Adafruit <https://www.adafruit.com/>`__
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- :apiref:`tcs34725/tcs34725.h`
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- :ghedit:`Edit`
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