Introduction
============

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CircuitPython support for the DHT11 and DHT22 temperature and humidity devices.

Dependencies
=============
This driver depends on:

* `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_

Please ensure all dependencies are available on the CircuitPython filesystem.
This is easily achieved by downloading
`the Adafruit library and driver bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>`_.

Usage Example
=============

Hardware Set-up
---------------

The DHT11 and DHT22 devices both need a pull-resistor on the data signal wire.  
This resistor is in the range of 1k to 5k.  Please check your device datasheet for the 
appropriate value.

Basics
------

Of course, you must import the library to use it:

.. code:: python

    import adafruit_dht

The DHT type devices use single data wire, so import the board pin

.. code:: python

    from board import <pin>

Now, to initialize the DHT11 device:

.. code:: python

    dht_device = adafruit_dht.DHT11(<pin>)

OR initialize the DHT22 device:

.. code:: python

    dht_device = adafruit_dht.DHT22(<pin>)

Read temperature and humidity
----------------------------

Now get the temperature and humidity values

.. code:: python

    temperature = dht_device.temperature
    humidity = dht_device.humidity

These properties may raise an exception if a problem occurs.  You should use try/raise 
logic and catch RuntimeError and then retry getting the values after 1/2 second.

Contributing
============

Contributions are welcome! Please read our `Code of Conduct
<https://github.com/adafruit/Adafruit_CircuitPython_DHT/blob/master/CODE_OF_CONDUCT.md>`_
before contributing to help this project stay welcoming.

API Reference
=============

.. toctree::
   :maxdepth: 2

   api