zephyr/samples/sensor/sht3xd
Tomasz Bursztyka e18fcbba5a device: Const-ify all device driver instance pointers
Now that device_api attribute is unmodified at runtime, as well as all
the other attributes, it is possible to switch all device driver
instance to be constant.

A coccinelle rule is used for this:

@r_const_dev_1
  disable optional_qualifier
@
@@
-struct device *
+const struct device *

@r_const_dev_2
 disable optional_qualifier
@
@@
-struct device * const
+const struct device *

Fixes #27399

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
2020-09-02 13:48:13 +02:00
..
boards
src device: Const-ify all device driver instance pointers 2020-09-02 13:48:13 +02:00
CMakeLists.txt
prj.conf
README.rst
sample.yaml
trigger.conf

.. _sht3xd:

SHT3XD: High accuracy digital I2C humidity sensor
#################################################

Description
***********

This sample application periodically (2 Hz) measures the ambient
temperature and humidity. The result is written to the console.
Optionally, it also shows how to use the upper threshold triggers.

References
**********

 - `SHT3X-DIS sensor <https://www.sensirion.com/en/environmental-sensors/humidity-sensors/digital-humidity-sensors-for-various-applications/>`_

Wiring
*******

This sample uses the SHT3X_DIS sensor controlled using the I2C interface.
Connect Supply: **VDD**, **GND** and Interface: **SDA**, **SCL**
and optionally connect the **ALERT** to a interrupt capable GPIO.
The supply voltage can be in the 2.15V to 5.5V range.
Depending on the baseboard used, the **SDA** and **SCL** lines require Pull-Up
resistors.

Building and Running
********************

This project outputs sensor data to the console. It requires a SHT3XD
sensor. It should work with any platform featuring a I2C peripheral
interface.  It does not work on QEMU.  In this example below the
:ref:`nrf51_ble400` board is used.


.. zephyr-app-commands::
   :zephyr-app: samples/sensor/sht3xd
   :board: nrf51_ble400
   :goals: build flash

Sample Output
=============

.. code-block:: console

   SHT3XD: 19.64 Cel ; 41.96 %RH
   SHT3XD: 19.74 Cel ; 42.06 %RH
   SHT3XD: 19.75 Cel ; 42.08 %RH

<repeats endlessly>