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100 lines
3.2 KiB
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100 lines
3.2 KiB
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.. include:: ../Plugin/_plugin_substitutions_p11x.repl
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.. _P114_page:
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|P114_typename|
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==================================================
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|P114_shortinfo|
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Plugin details
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--------------
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Type: |P114_type|
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Name: |P114_name|
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Status: |P114_status|
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GitHub: |P114_github|_
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Maintainer: |P114_maintainer|
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Used libraries: |P114_usedlibraries|
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Description
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-----------
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This I2C sensor with 2 resolutions (normal/high dynamic) offers UVA (365 +/-10 nm) and UVB (330 +/-10 nm) measurement and a calculated UVIndex value. Output result for UV is in irradiance, watt per square metre. The maximum value that can me measured is 65535, as the chip provides 16 bit values.
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NB: If the unit is over-exposed, possibly the measurement could exceed the maximum returned value of 65535, and the calculated UVIndex value will *not* be correct.
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NB2: When measuring outside UV exposure, the sensor should also be outside, as f.e. window glass filters out most UV radiance, and measurements will be (very) inaccurate.
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Configuration
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--------------
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.. image:: P114_DeviceConfiguration.png
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**Name** A unique name should be entered here.
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**Enabled** The device can be disabled or enabled. When not enabled the device should not use any resources.
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I2C Options
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^^^^^^^^^^^^
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The available settings here depend on the build used. At least the **Force Slow I2C speed** option is available, but selections for the I2C Multiplexer can also be shown. For details see the :ref:`Hardware_page`
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**I2C Address**: The address the device is using. Depending on the board used, when available a SDO pin, or soldering a 0 ohm resistor on a different location, can be used to select the used address. If that address selection is not available, then an I2C multiplexer (in a matching ESPEasy build) can be used to use multiple sensors on a single ESPEasy unit.
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Device Settings
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^^^^^^^^^^^^^^^^
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**Integration Time**: The integration time setting of the sensor determines the accuracy of the measurement. There are 5 options available:
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.. image:: P114_IntegrationTime.png
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*50 ms* The default value, using an integration time of 50 msec.
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*100ms*
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*200ms*
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*400ms*
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*800ms*
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Usually a higher integration time results in a more accurate measurement.
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**Dynamic Setting**: This determines the dynamic setting:
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.. image:: P114_DynamicSetting.png
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*Normal Dynamic*
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*High Dynamic* For better response to changing conditions during measurement.
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.. include:: DataAcquisition.repl
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**Interval** By default, Interval will be set to 60 sec. The minimum value allowed is 1 sec. but for measuring UV values, that don't change very quickly, reasonable values should be between 10 and 300 sec.
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Values
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^^^^^^
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The measured values are available in ``UVA``, ``UVB`` and ``UCIndex``. A formula can be set to recalculate. The number of decimals is by default set to 2, and can be set to 0 for ``UVA`` and ``UVB``, as no decimals are provided from the measurement. ``UVIndex`` value is often used without decimals, but can be set as desired.
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.. Events
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.. ~~~~~~
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.. .. include:: P114_events.repl
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Change log
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----------
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.. versionchanged:: 2.0
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|added| 2021-04-24 Moved to main repository as Plugin 114 UV - VEML6075 UVA/UVB Sensor from the ESPEasyPluginPlayground (P130).
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