mirror of
https://github.com/zephyrproject-rtos/zephyr
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407b49b35c
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>
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| .. | ||
| src | ||
| CMakeLists.txt | ||
| efr32mg_sltb004a.overlay | ||
| frdm_k64f.overlay | ||
| nrf51_ble400.overlay | ||
| nrf52840dk_nrf52840.overlay | ||
| nucleo_l476rg.overlay | ||
| 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>