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68 lines
2.5 KiB
ReStructuredText
BH1750 Ambient Light Sensor
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===========================
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.. seo::
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:description: Instructions for setting up BH1750 ambient light sensors in ESPHome.
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:image: bh1750.jpg
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:keywords: BH1750
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The ``bh1750`` sensor platform allows you to use your BH1750
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(`datasheet <http://www.mouser.com/ds/2/348/bh1750fvi-e-186247.pdf>`__, `Adafruit`_, `mklec`_)
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ambient light sensor 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/bh1750-full.jpg
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:align: center
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:width: 50.0%
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BH1750 Ambient Light Sensor.
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.. _Adafruit: https://www.adafruit.com/product/1603
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.. _mklec: http://mklec.com/modules/micro-controller-modules/bh1750-bh1750fvi-digital-light-sensor-module
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.. figure:: images/bh1750-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: bh1750
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name: "BH1750 Illuminance"
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address: 0x23
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measurement_time: 69
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update_interval: 60s
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By default the **measurement_time** is set to ``69`` which will result into measurements up
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to 54612.5 lx for this sensor. For low-light situtations consider to choose a higer
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measurement_time up to ``254`` which will result in a maximum measurement range up to 14835 lx.
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For sunny scenes (for example outdoors with sunlight) use lower values down to ``31`` which will
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give you the maximum measurement range up to 121556 lx.
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Configuration variables:
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------------------------
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- **name** (**Required**, string): The name for the sensor.
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- **address** (*Optional*, int): Manually specify the i^2c address of the sensor.
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Defaults to ``0x23`` (address if address pin is pulled low). If the address pin is pulled high,
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the address is ``0x5C``.
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- **measurement_time** (*Optional*, int): Manually specifiy the measurement time between ``31``
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and ``254``. Defaults to ``69``.
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- **resolution** (*Optional*, string): The resolution of the sensor in lx. One of ``4.0``,
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``1.0``, ``0.5``. Defaults to ``0.5`` (the maximum resolution).
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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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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code
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generation.
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- All other options from :ref:`Sensor <config-sensor>`.
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See Also
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--------
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- :ref:`sensor-filters`
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- :doc:`tsl2561`
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- :apiref:`bh7150/bh7150.h`
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- `BH1750 Library <https://github.com/claws/BH1750>`__ by `@claws <https://github.com/claws>`__
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- :ghedit:`Edit`
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