zephyr

History

Torsten Rasmussen 407b49b35c cmake: use find_package to locate Zephyr Using find_package to locate Zephyr. Old behavior was to use $ENV{ZEPHYR_BASE} for inclusion of boiler plate code. Whenever an automatic run of CMake happend by the build system / IDE then it was required that ZEPHYR_BASE was defined. Using ZEPHYR_BASE only to locate the Zephyr package allows CMake to cache the base variable and thus allowing subsequent invocation even if ZEPHYR_BASE is not set in the environment. It also removes the risk of strange build results if a user switchs between different Zephyr based project folders and forgetting to reset ZEPHYR_BASE before running ninja / make. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>		2020-03-27 16:23:46 +01:00
..
src	drivers: sensor: sht3xd: convert to new GPIO APIO	2020-02-05 12:00:36 +01:00
CMakeLists.txt	cmake: use find_package to locate Zephyr	2020-03-27 16:23:46 +01:00
efr32mg_sltb004a.overlay	drivers: sensor: sht3xd: convert to new GPIO APIO	2020-02-05 12:00:36 +01:00
frdm_k64f.overlay	drivers: sensor: sht3xd: convert to new GPIO APIO	2020-02-05 12:00:36 +01:00
nrf51_ble400.overlay	drivers: sensor: sht3xd: convert to new GPIO APIO	2020-02-05 12:00:36 +01:00
nrf52840dk_nrf52840.overlay	boards: nrf52840_pca10056: Rename board to nrf52840dk_nrf52840	2020-03-27 09:14:08 +01:00
nucleo_l476rg.overlay	drivers: sensor: sht3xd: convert to new GPIO APIO	2020-02-05 12:00:36 +01:00
prj.conf
README.rst	global: Remove leading/trailing blank lines in files	2019-12-11 19:17:27 +01:00
sample.yaml	boards: nrf52840_pca10056: Rename board to nrf52840dk_nrf52840	2020-03-27 09:14:08 +01:00
trigger.conf	drivers: sensor: sht3xd: convert to new GPIO APIO	2020-02-05 12:00:36 +01:00

README.rst

.. _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>