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zephyr/samples/sensor/mhz19b
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Gerard Marull-Paretas c7b5b3c419 samples: migrate includes to contain <zephyr/...> prefix 
In order to bring consistency in-tree, migrate all samples to the use
the new prefix <zephyr/...>. Note that the conversion has been scripted:

```python
from pathlib import Path
import re

EXTENSIONS = ("c", "h", "cpp", "rst")

for p in Path(".").glob("samples/**/*"):
    if not p.is_file() or p.suffix and p.suffix[1:] not in EXTENSIONS:
        continue

    content = ""
    with open(p) as f:
        for line in f:
            m = re.match(r"^(.*)#include <(.*)>(.*)$", line)
            if (m and
                not m.group(2).startswith("zephyr/") and
                (Path(".") / "include" / "zephyr" / m.group(2)).exists()):
                content += (
                    m.group(1) +
                    "#include <zephyr/" + m.group(2) +">" +
                    m.group(3) + "\n"
                )
            else:
                content += line

    with open(p, "w") as f:
        f.write(content)
```

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
2022-05-06 11:29:59 +02:00
..
boards
src
CMakeLists.txt
prj.conf
README.rst
sample.yaml

README.rst 

.. _mhz19b-sample:

MH-Z19B: CO2 Sensor Sample
##########################

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

This sample application demonstrate the configurations of the MH-Z19B CO2
sensor, then periodically reads CO2 data from the sensor. The driver
currently only support uart interrupt APIs.

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

The baudrate of the UART must be configured to 9600, and must support
interrupt driven API.

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

To build the application, a board with UART interface
has to be chosen, or a custom devicetree overlay has to be provided.
Here Nucleo G0B1RE board is used.
Then, connect the RX and TX from your Zephyr target board to the
MH-Z19B CO2 sensor and power the sensor according to the datasheet.

.. zephyr-app-commands::
   :zephyr-app: samples/sensor/mhz19b
   :board: nucleo_g0b1re
   :goals: build
   :compact:

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

The application will perform runtime configuration of the sensor, then
read back the sensor configuration data. After that it will read the CO2
data every 2 seconds.

.. code-block:: console

   Winsen MH-Z19B CO2 sensor application
   Configuring sensor - OK
   Reading configurations from sensor:
   Sensor range is set to 5000ppm
   Sensor ABC is enabled
   sensor: co2 reading: 758
   sensor: co2 reading: 759
   sensor: co2 reading: 762

   <repeats endlessly every 2 seconds>