README.rst
1.. zephyr:code-sample:: pressure_polling
2 :name: Barometric pressure and temperature sensor polling example
3 :relevant-api: sensor_interface
4
5 Get barometric pressure and temperature data from a sensor.
6
7Overview
8********
9
10This sample application periodically reads the sensor
11temperature and pressure, displaying the
12values on the console along with a timestamp since startup.
13It also displays the estimated altitude if floating point is supported
14and the sensor provides altitude data.
15
16Wiring
17*******
18
19This sample uses an external breakout for the sensor. A devicetree
20overlay must be provided to identify the I2C/SPI used to control the sensor.
21
22Building and Running
23********************
24
25This sample supports pressure sensor devices. Device needs
26to be aliased as ``pressure-sensor``. For example:
27
28.. code-block:: devicetree
29
30 / {
31 aliases {
32 pressure-sensor = &icp201xx;
33 };
34 };
35
36Make sure the aliases are in devicetree, then build and run with:
37
38.. zephyr-app-commands::
39 :zephyr-app: samples/sensor/pressure_polling
40 :board: nrf52dk/nrf52832
41 :goals: build flash
42
43Sample Output
44=============
45
46.. code-block:: console
47
48 Found device "icp101xx@63", getting sensor data
49 Starting pressure and altitude polling sample.
50 temp 25.49 Cel, pressure 96.271438 kPa, altitude 447.208465 m
51 temp 25.50 Cel, pressure 96.271331 kPa, altitude 447.234161 m
52 temp 25.49 Cel, pressure 96.266685 kPa, altitude 447.636077 m
53 temp 25.50 Cel, pressure 96.267951 kPa, altitude 447.537078 m
54 temp 25.51 Cel, pressure 96.268577 kPa, altitude 447.488281 m
55 temp 25.50 Cel, pressure 96.269340 kPa, altitude 447.414978 m
56 temp 25.50 Cel, pressure 96.268562 kPa, altitude 447.473663 m
57 temp 25.50 Cel, pressure 96.267341 kPa, altitude 447.596496 m
58
59 <repeats endlessly>
60
