89 lines
3.6 KiB
ReStructuredText
89 lines
3.6 KiB
ReStructuredText
DHT Temperature+Humidity Sensor
|
|
===============================
|
|
|
|
.. seo::
|
|
:description: Instructions for setting up DHT11 and DHT22 temperature and humidity sensors.
|
|
: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>`__),
|
|
- AM2120 (`datasheet <https://www.micros.com.pl/mediaserver/UPAM2120_0004.pdf>`__),
|
|
- 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
|
|
:align: center
|
|
:width: 50.0%
|
|
|
|
DHT22 Temperature & Humidity Sensor.
|
|
|
|
.. _Adafruit: https://www.adafruit.com/product/385
|
|
|
|
The DHT22 and DHT11 require external pull up resistors on the data line. To do this, solder
|
|
a resistor with *about* 4.7kΩ (anything in the range from 1kΩ to 10kΩ probably works fine, but
|
|
if you're having issues try the 4.7kΩ recommended by the manufacturer) between ``DATA`` and ``3.3V``.
|
|
|
|
.. figure:: images/temperature-humidity.png
|
|
:align: center
|
|
:width: 80.0%
|
|
|
|
.. code-block:: yaml
|
|
|
|
# Example configuration entry
|
|
sensor:
|
|
- platform: dht
|
|
pin: D2
|
|
temperature:
|
|
name: "Living Room Temperature"
|
|
humidity:
|
|
name: "Living Room Humidity"
|
|
update_interval: 60s
|
|
|
|
Configuration variables:
|
|
------------------------
|
|
|
|
- **pin** (**Required**, :ref:`config-pin`): The pin where the DHT bus is connected.
|
|
- **temperature** (**Required**): The information for the temperature sensor.
|
|
|
|
- All options from :ref:`Sensor <config-sensor>`.
|
|
|
|
- **humidity** (**Required**): The information for the humidity sensor
|
|
|
|
- All 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``, ``AM2120``
|
|
and helps with some connection issues. Defaults to ``AUTO_DETECT``. Auto detection doesn't work for the SI7021 chip.
|
|
- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the
|
|
sensor. Defaults to ``60s``.
|
|
|
|
.. 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.
|
|
|
|
See Also
|
|
--------
|
|
|
|
- :ref:`sensor-filters`
|
|
- :doc:`absolute_humidity`
|
|
- :doc:`dht12`
|
|
- :doc:`hdc1080`
|
|
- :doc:`htu21d`
|
|
- :doc:`sht3xd`
|
|
- :apiref:`dht/dht.h`
|
|
- `Arduino DHTLib <https://playground.arduino.cc/Main/DHTLib>`__
|
|
- :ghedit:`Edit`
|