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Merge pull request #2402 from dirrgang/patch-1

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Added note about decimal accuracy of other sensors
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H. Árkosi Róbert 2022-11-28 10:10:03 +01:00 committed by GitHub
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components/sensor/dht.rst
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@ -6,17 +6,14 @@ DHT Temperature+Humidity Sensor
:image: dht.jpg
:keywords: DHT11, DHT21, DHT22, AMS2301, AM2302, RHT03, SI7021
The DHT Temperature+Humidity sensor allows you to use your DHT11
(`datasheet <https://akizukidenshi.com/download/ds/aosong/DHT11.pdf>`__,
`Adafruit <https://www.adafruit.com/product/386>`__), DHT21/DHT22
(`datasheet <https://www.sparkfun.com/datasheets/Sensors/Temperature/DHT22.pdf>`__,
`Adafruit <https://www.adafruit.com/product/385>`__), AMS2301/AM2302
(`datasheet <https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf>`__,
`Adafruit <https://www.adafruit.com/product/393>`__), RHT03
(`datasheet <https://cdn.sparkfun.com/datasheets/Sensors/Weather/RHT03.pdf>`__,
`SparkFun <https://cdn.sparkfun.com/datasheets/Sensors/Weather/RHT03.pdf>`__) and SI7021 (one wire Sonoff version)
(`datasheet <https://cdn.sparkfun.com/assets/b/1/b/8/5/Si7021-A20.pdf>`__,
`SparkFun <https://cdn.sparkfun.com/assets/b/1/b/8/5/Si7021-A20.pdf>`__)
The DHT Temperature+Humidity sensor allows you to use your
- DHT11 (`datasheet <https://akizukidenshi.com/download/ds/aosong/DHT11.pdf>`__, `Adafruit <https://www.adafruit.com/product/386>`__),
- DHT21/DHT22 (`datasheet <https://www.sparkfun.com/datasheets/Sensors/Temperature/DHT22.pdf>`__, `Adafruit <https://www.adafruit.com/product/385>`__),
- AMS2301/AM2302 (`datasheet <https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf>`__, `Adafruit <https://www.adafruit.com/product/393>`__),
- RHT03 (`datasheet <https://cdn.sparkfun.com/datasheets/Sensors/Weather/RHT03.pdf>`__, `SparkFun <https://cdn.sparkfun.com/datasheets/Sensors/Weather/RHT03.pdf>`__) and
- SI7021 (one wire Sonoff version) (`datasheet <https://cdn.sparkfun.com/assets/b/1/b/8/5/Si7021-A20.pdf>`__, `SparkFun <https://cdn.sparkfun.com/assets/b/1/b/8/5/Si7021-A20.pdf>`__)
sensors with ESPHome.
.. figure:: images/dht-full.jpg
@ -62,6 +59,7 @@ Configuration variables:
- **name** (**Required**, string): The name for the humidity sensor.
- **id** (*Optional*, :ref:`config-id`): Set the ID of this sensor for use in lambdas.
- All other options from :ref:`Sensor <config-sensor>`.
- **model** (*Optional*, int): Manually specify the DHT model, can be
one of ``AUTO_DETECT``, ``DHT11``, ``DHT22``, ``DHT22_TYPE2``, ``AM2302``, ``RHT03``, ``SI7021``
@ -71,6 +69,10 @@ Configuration variables:
.. note::
The default ``accuracy_decimals`` value of the *humidity* levels is ``0``, as the DHT11 for which this was
originally written does not have a higher resolution. All other DHT sensors have a higher resolution, it's worth
to configure them with ``accuracy_decimals: 1``.
If you're seeing lots of invalid temperature/humidity warnings in the logs, try manually setting the
DHT model with the ``model:`` configuration variable. Other problems could be wrong pull-up resistor values
on the DATA pin or too long cables.