.. _dht:
DHT: Aosong DHT Digital-output Humidity and Temperature Sensor
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Description
***********
This sample application periodically (0.5 Hz) measures the ambient
temperature and humidity. The result is written to the console.
Wiring
*******
This sample uses an external breakout for the sensor. A devicetree
overlay must be provided to identify the sensor variant and the GPIO
used to control the sensor.
Building and Running
********************
After providing a devicetree overlay that specifies the sensor location,
build this sample app using:
.. zephyr-app-commands::
:zephyr-app: samples/sensor/dht
:board: nrf52_pca10040
:goals: build flash
Sample Output
=============
.. code-block:: console
*** Booting Zephyr OS build zephyr-v2.1.0-329-g38418b26c4cc ***
[0:00:00.027]: 20.0 Cel ; 48.7 %RH
[0:00:02.053]: 19.8 Cel ; 48.7 %RH
[0:00:04.079]: 20.0 Cel ; 48.7 %RH
[0:00:06.105]: 19.8 Cel ; 48.7 %RH
[0:00:08.130]: 20.0 Cel ; 48.8 %RH
[0:00:10.156]: 20.1 Cel ; 48.8 %RH
[0:00:12.182]: 19.7 Cel ; 48.7 %RH
[0:00:14.207]: 20.0 Cel ; 48.8 %RH
<repeats endlessly>
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