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zephyr/samples/sensor/th02
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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
..
boards sensor: th02: Convert to DTS 2019-11-08 07:44:54 -06:00
src coccinelle: standardize k_sleep calls with integer timeouts 2019-10-09 08:38:10 -04:00
CMakeLists.txt cmake: use find_package to locate Zephyr 2020-03-27 16:23:46 +01:00
prj.conf sensors: move grove sensors under drivers/sensor 2018-10-28 11:46:36 -04:00
README.rst doc: fix board/sample broken links 2017-06-13 20:49:13 -04:00
sample.yaml sensor: th02: Convert to DTS 2019-11-08 07:44:54 -06:00

README.rst 

.. _th02-sample:

TH02: Temperature and Humidity Monitor
######################################

Overview
********
This sample periodically reads temperature and humidity from the Grove
Temperature & Humidity Sensor (TH02) and display the results on the Grove LCD
display.


Requirements
************

This sample uses the TH02 sensor and the grove LCD display. Both devices are
controlled using the I2C interface.

More details about the sensor and the display can be found here:

- `Grove Temperature And Humidity`_
- `Grove LCD Module`_

Wiring
******

The easiest way to get this wired is to use the Grove shield and connect both
devices to I2C. No additional wiring is required. Depending on the board you are
using you might need to connect two 10K ohm resistors to SDL and and SDA (I2C).
The LCD display requires 5 volts, so the voltage switch on the shield needs to
be on 5v.


References
**********

 - TH02: http://www.datasheetspdf.com/mobile/748107/TH02.html


.. _Grove LCD Module: http://wiki.seeed.cc/Grove-LCD_RGB_Backlight/
.. _Grove Temperature And Humidity: http://wiki.seeed.cc/Grove-TemptureAndHumidity_Sensor-High-Accuracy_AndMini-v1.0/