HUMIDITY Archives - icodebroker

[C#/UWP/RASPBERRYPI] DHT11 온도/습도 센서 사용하기

■ DHT11 온도/습도 센서를 사용하는 방법을 보여준다. ▶ 부품 내역


───────────────────
구분                모델    수량  비고
─────────  ───  ──  ──
SENSOR/TEMPERATURE  DHT11   1
───────────────────

───────────────────

구분 모델 수량 비고

───────── ─── ── ──

SENSOR/TEMPERATURE DHT11 1

───────────────────

[회로 구성도] ▶ MainPage.xaml


<Page x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    RequestedTheme="Dark">
    <Page.Resources>
        <Thickness x:Key="DashboardBorderMarginKey">3 3 3 3</Thickness>
        <Thickness x:Key="DashboardBorderThicknessKey">2</Thickness>
        <SolidColorBrush x:Key="DashboardBorderBrushKey">#ff0063b1</SolidColorBrush>
        <x:Double x:Key="DashboardFontSizeKey">25</x:Double>
        <SolidColorBrush x:Key="DashboardHeaderTextBrushKey">#ff0063b1</SolidColorBrush>
        <SolidColorBrush x:Key="DashboardTextBrushKey">White</SolidColorBrush>
        <SolidColorBrush x:Key="DisplayHeaderTextBrushKey">Yellow</SolidColorBrush>
        <SolidColorBrush x:Key="DisplayTextBrushKey">White</SolidColorBrush>
    </Page.Resources>
    <Grid Background="Black">
        <Grid.RowDefinitions>
            <RowDefinition Height="1*" />
            <RowDefinition Height="3*" />
        </Grid.RowDefinitions>
        <Grid Grid.Row="0">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
            </Grid.RowDefinitions>
            <Border Grid.Column="0" Grid.Row="0"
                Margin="{StaticResource DashboardBorderMarginKey}"
                BorderThickness="{StaticResource DashboardBorderThicknessKey}"
                BorderBrush="{StaticResource DashboardBorderBrushKey}">
                <TextBlock
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    FontSize="{StaticResource DashboardFontSizeKey}"
                    Foreground="{StaticResource DashboardHeaderTextBrushKey}"
                    TextWrapping="WrapWholeWords"
                    Text="시도 건수" />
            </Border>
            <Border Grid.Column="0" Grid.Row="1"
                Margin="{StaticResource DashboardBorderMarginKey}"
                BorderThickness="{StaticResource DashboardBorderThicknessKey}"
                BorderBrush="{StaticResource DashboardBorderBrushKey}">
                <TextBlock x:Name="attemptCountTextBlock"
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    FontSize="{StaticResource DashboardFontSizeKey}"
                    Foreground="{StaticResource DashboardTextBrushKey}"
                    TextWrapping="WrapWholeWords" />
            </Border>

            <Border Grid.Column="1" Grid.Row="0"
                Margin="{StaticResource DashboardBorderMarginKey}"
                BorderThickness="{StaticResource DashboardBorderThicknessKey}"
                BorderBrush="{StaticResource DashboardBorderBrushKey}">
                <TextBlock
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    FontSize="{StaticResource DashboardFontSizeKey}"
                    Foreground="{StaticResource DashboardHeaderTextBrushKey}"
                    TextWrapping="WrapWholeWords"
                    Text="평균 재시도 건수" />
            </Border>
            <Border Grid.Column="1" Grid.Row="1"
                Margin="{StaticResource DashboardBorderMarginKey}"
                BorderThickness="{StaticResource DashboardBorderThicknessKey}"
                BorderBrush="{StaticResource DashboardBorderBrushKey}" >
                <TextBlock x:Name="averageRetryCountTextBlock"
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    FontSize="{StaticResource DashboardFontSizeKey}"
                    Foreground="{StaticResource DashboardTextBrushKey}"
                    TextWrapping="WrapWholeWords" />
            </Border>

            <Border Grid.Column="2" Grid.Row="0"
                Margin="{StaticResource DashboardBorderMarginKey}"
                BorderThickness="{StaticResource DashboardBorderThicknessKey}"
                BorderBrush="{StaticResource DashboardBorderBrushKey}">
                <TextBlock
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    FontSize="{StaticResource DashboardFontSizeKey}"
                    Foreground="{StaticResource DashboardHeaderTextBrushKey}"
                    TextWrapping="WrapWholeWords"
                    Text="성공 건수" />
            </Border>
            <Border Grid.Column="2" Grid.Row="1"
                Margin="{StaticResource DashboardBorderMarginKey}"
                BorderThickness="{StaticResource DashboardBorderThicknessKey}"
                BorderBrush="{StaticResource DashboardBorderBrushKey}">
                <TextBlock x:Name="successCountTextBlock"
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    FontSize="{StaticResource DashboardFontSizeKey}"
                    Foreground="{StaticResource DashboardTextBrushKey}"
                    TextWrapping="WrapWholeWords" />
            </Border>

            <Border Grid.Column="3" Grid.Row="0"
                Margin="{StaticResource DashboardBorderMarginKey}"
                BorderThickness="{StaticResource DashboardBorderThicknessKey}"
                BorderBrush="{StaticResource DashboardBorderBrushKey}">
                <TextBlock
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    FontSize="{StaticResource DashboardFontSizeKey}"
                    Foreground="{StaticResource DashboardHeaderTextBrushKey}"
                    TextWrapping="WrapWholeWords"
                    Text="성공율" />
            </Border>
            <Border Grid.Column="3" Grid.Row="1"
                Margin="{StaticResource DashboardBorderMarginKey}"
                BorderThickness="{StaticResource DashboardBorderThicknessKey}"
                BorderBrush="{StaticResource DashboardBorderBrushKey}">
                <TextBlock x:Name="successRateTextBlock"
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    FontSize="{StaticResource DashboardFontSizeKey}"
                    Foreground="{StaticResource DashboardTextBrushKey}"
                    TextWrapping="WrapWholeWords" />
            </Border>

            <Border Grid.Column="4" Grid.Row="0"
                Margin="{StaticResource DashboardBorderMarginKey}"
                BorderThickness="{StaticResource DashboardBorderThicknessKey}"
                BorderBrush="{StaticResource DashboardBorderBrushKey}">
                <TextBlock
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    FontSize="{StaticResource DashboardFontSizeKey}"
                    Foreground="{StaticResource DashboardHeaderTextBrushKey}"
                    TextWrapping="WrapWholeWords"
                    Text="비율" />
            </Border>
            <Border Grid.Column="4" Grid.Row="1"
                Margin="{StaticResource DashboardBorderMarginKey}"
                BorderThickness="{StaticResource DashboardBorderThicknessKey}"
                BorderBrush="{StaticResource DashboardBorderBrushKey}">
                <TextBlock x:Name="rateTextBlock"
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    FontSize="{StaticResource DashboardFontSizeKey}"
                    Foreground="{StaticResource DashboardTextBrushKey}"
                    TextWrapping="WrapWholeWords" />
            </Border>
        </Grid>
        <Grid Grid.Row="1">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
                <RowDefinition Height="*" />
            </Grid.RowDefinitions>
            <TextBlock Grid.Column="0" Grid.Row="0"
                HorizontalAlignment="Center"
                VerticalAlignment="Bottom"
                FontSize="50"
                Foreground="{StaticResource DisplayHeaderTextBrushKey}"
                Text="습도" />
            <TextBlock x:Name="humidityTextBlock" Grid.Column="0" Grid.Row="1"
                HorizontalAlignment="Center"
                VerticalAlignment="Top"
                Margin="10 10 10 10"
                FontSize="90"
                Foreground="{StaticResource DisplayTextBrushKey}" />

            <TextBlock Grid.Column="1" Grid.Row="0"
                HorizontalAlignment="Center"
                VerticalAlignment="Bottom"
                FontSize="50"
                Foreground="{StaticResource DisplayHeaderTextBrushKey}"
                Text="온도" />
            <TextBlock x:Name="temperatureTextBlock" Grid.Column="1" Grid.Row="1"
                Margin="10 10 10 10"
                HorizontalAlignment="Center"
                VerticalAlignment="Top"
                FontSize="90"
                Foreground="{StaticResource DisplayTextBrushKey}" />

            <TextBlock Grid.Column="0" Grid.Row="2"
                HorizontalAlignment="Right"
                VerticalAlignment="Center"
                Margin="0 0 20 0"
                FontSize="35"
                Foreground="{StaticResource DisplayHeaderTextBrushKey}"
                Text="최근 갱신 일시 :" />
            <TextBlock x:Name="lastUpdatedOffsetTextBlock" Grid.Column="1" Grid.Row="2"
                HorizontalAlignment="Left"
                VerticalAlignment="Center"
                Margin="20 0 0 0"
                FontSize="35"
                Foreground="{StaticResource DisplayTextBrushKey}" />
        </Grid>
    </Grid>
</Page>

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<Page x:Class="TestProject.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

mc:Ignorable="d"

RequestedTheme="Dark">

<Page.Resources>

<x:Double x:Key="DashboardFontSizeKey">25</x:Double>

<SolidColorBrush x:Key="DashboardTextBrushKey">White</SolidColorBrush>

<SolidColorBrush x:Key="DisplayHeaderTextBrushKey">Yellow</SolidColorBrush>

<SolidColorBrush x:Key="DisplayTextBrushKey">White</SolidColorBrush>

</Page.Resources>

<Grid.RowDefinitions>

</Grid.RowDefinitions>

<Grid.ColumnDefinitions>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

</Grid.RowDefinitions>

<Border Grid.Column="0" Grid.Row="0"

Margin="{StaticResource DashboardBorderMarginKey}"

BorderThickness="{StaticResource DashboardBorderThicknessKey}"

BorderBrush="{StaticResource DashboardBorderBrushKey}">

<TextBlock

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="{StaticResource DashboardFontSizeKey}"

Foreground="{StaticResource DashboardHeaderTextBrushKey}"

TextWrapping="WrapWholeWords"

Text="시도 건수" />

</Border>

<Border Grid.Column="0" Grid.Row="1"

Margin="{StaticResource DashboardBorderMarginKey}"

BorderThickness="{StaticResource DashboardBorderThicknessKey}"

BorderBrush="{StaticResource DashboardBorderBrushKey}">

<TextBlock x:Name="attemptCountTextBlock"

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="{StaticResource DashboardFontSizeKey}"

Foreground="{StaticResource DashboardTextBrushKey}"

TextWrapping="WrapWholeWords" />

</Border>

<Border Grid.Column="1" Grid.Row="0"

Margin="{StaticResource DashboardBorderMarginKey}"

BorderThickness="{StaticResource DashboardBorderThicknessKey}"

BorderBrush="{StaticResource DashboardBorderBrushKey}">

<TextBlock

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="{StaticResource DashboardFontSizeKey}"

Foreground="{StaticResource DashboardHeaderTextBrushKey}"

TextWrapping="WrapWholeWords"

Text="평균 재시도 건수" />

</Border>

<Border Grid.Column="1" Grid.Row="1"

Margin="{StaticResource DashboardBorderMarginKey}"

BorderThickness="{StaticResource DashboardBorderThicknessKey}"

BorderBrush="{StaticResource DashboardBorderBrushKey}" >

<TextBlock x:Name="averageRetryCountTextBlock"

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="{StaticResource DashboardFontSizeKey}"

Foreground="{StaticResource DashboardTextBrushKey}"

TextWrapping="WrapWholeWords" />

</Border>

<Border Grid.Column="2" Grid.Row="0"

Margin="{StaticResource DashboardBorderMarginKey}"

BorderThickness="{StaticResource DashboardBorderThicknessKey}"

BorderBrush="{StaticResource DashboardBorderBrushKey}">

<TextBlock

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="{StaticResource DashboardFontSizeKey}"

Foreground="{StaticResource DashboardHeaderTextBrushKey}"

TextWrapping="WrapWholeWords"

Text="성공 건수" />

</Border>

<Border Grid.Column="2" Grid.Row="1"

Margin="{StaticResource DashboardBorderMarginKey}"

BorderThickness="{StaticResource DashboardBorderThicknessKey}"

BorderBrush="{StaticResource DashboardBorderBrushKey}">

<TextBlock x:Name="successCountTextBlock"

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="{StaticResource DashboardFontSizeKey}"

Foreground="{StaticResource DashboardTextBrushKey}"

TextWrapping="WrapWholeWords" />

</Border>

<Border Grid.Column="3" Grid.Row="0"

Margin="{StaticResource DashboardBorderMarginKey}"

BorderThickness="{StaticResource DashboardBorderThicknessKey}"

BorderBrush="{StaticResource DashboardBorderBrushKey}">

<TextBlock

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="{StaticResource DashboardFontSizeKey}"

Foreground="{StaticResource DashboardHeaderTextBrushKey}"

TextWrapping="WrapWholeWords"

Text="성공율" />

</Border>

<Border Grid.Column="3" Grid.Row="1"

Margin="{StaticResource DashboardBorderMarginKey}"

BorderThickness="{StaticResource DashboardBorderThicknessKey}"

BorderBrush="{StaticResource DashboardBorderBrushKey}">

<TextBlock x:Name="successRateTextBlock"

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="{StaticResource DashboardFontSizeKey}"

Foreground="{StaticResource DashboardTextBrushKey}"

TextWrapping="WrapWholeWords" />

</Border>

<Border Grid.Column="4" Grid.Row="0"

Margin="{StaticResource DashboardBorderMarginKey}"

BorderThickness="{StaticResource DashboardBorderThicknessKey}"

BorderBrush="{StaticResource DashboardBorderBrushKey}">

<TextBlock

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="{StaticResource DashboardFontSizeKey}"

Foreground="{StaticResource DashboardHeaderTextBrushKey}"

TextWrapping="WrapWholeWords"

Text="비율" />

</Border>

<Border Grid.Column="4" Grid.Row="1"

Margin="{StaticResource DashboardBorderMarginKey}"

BorderThickness="{StaticResource DashboardBorderThicknessKey}"

BorderBrush="{StaticResource DashboardBorderBrushKey}">

<TextBlock x:Name="rateTextBlock"

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="{StaticResource DashboardFontSizeKey}"

Foreground="{StaticResource DashboardTextBrushKey}"

TextWrapping="WrapWholeWords" />

</Border>

</Grid>

<Grid.ColumnDefinitions>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

</Grid.RowDefinitions>

<TextBlock Grid.Column="0" Grid.Row="0"

HorizontalAlignment="Center"

VerticalAlignment="Bottom"

FontSize="50"

Foreground="{StaticResource DisplayHeaderTextBrushKey}"

Text="습도" />

<TextBlock x:Name="humidityTextBlock" Grid.Column="0" Grid.Row="1"

HorizontalAlignment="Center"

VerticalAlignment="Top"

Margin="10 10 10 10"

FontSize="90"

Foreground="{StaticResource DisplayTextBrushKey}" />

<TextBlock Grid.Column="1" Grid.Row="0"

HorizontalAlignment="Center"

VerticalAlignment="Bottom"

FontSize="50"

Foreground="{StaticResource DisplayHeaderTextBrushKey}"

Text="온도" />

<TextBlock x:Name="temperatureTextBlock" Grid.Column="1" Grid.Row="1"

Margin="10 10 10 10"

HorizontalAlignment="Center"

VerticalAlignment="Top"

FontSize="90"

Foreground="{StaticResource DisplayTextBrushKey}" />

<TextBlock Grid.Column="0" Grid.Row="2"

HorizontalAlignment="Right"

VerticalAlignment="Center"

Margin="0 0 20 0"

FontSize="35"

Foreground="{StaticResource DisplayHeaderTextBrushKey}"

Text="최근 갱신 일시 :" />

<TextBlock x:Name="lastUpdatedOffsetTextBlock" Grid.Column="1" Grid.Row="2"

HorizontalAlignment="Left"

VerticalAlignment="Center"

Margin="20 0 0 0"

FontSize="35"

Foreground="{StaticResource DisplayTextBrushKey}" />

</Grid>

</Page>

▶ MainPage.xaml.cs


using System;
using System.Collections.Generic;
using System.Linq;
using Windows.Devices.Gpio;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;

using Sensors.DHT;

namespace TestProject
{
    /// <summary>
    /// 메인 페이지
    /// </summary>
    public sealed partial class MainPage : Page
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Field

        #region Field

        /// <summary>
        /// 디스패처 타이머
        /// </summary>
        private DispatcherTimer dispatcherTimer = null;

        /// <summary>
        /// DHT 인터페이스
        /// </summary>
        private IDHT dht = null;

        /// <summary>
        /// GPIO 핀
        /// </summary>
        private GpioPin gpioPin = null;

        /// <summary>
        /// 현재 일시 오프셋
        /// </summary>
        private DateTimeOffset currentDateTimeOffset = DateTimeOffset.MinValue;


        /// <summary>
        /// 시도 건수
        /// </summary>
        private int attemptCount = 0;

        /// <summary>
        /// 재시도 카운트 리스트
        /// </summary>
        private List<int> retryCountList = new List<int>();

        /// <summary>
        /// 성공 건수
        /// </summary>
        private int successCount = 0;

        /// <summary>
        /// 습도
        /// </summary>
        private float humidity = 0f;

        /// <summary>
        /// 온도
        /// </summary>
        private float temperature = 0f;

        /// <summary>
        /// 최근 갱신 오프셋
        /// </summary>
        private DateTimeOffset lastUpdatedOffset = DateTimeOffset.MinValue;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainPage()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainPage()
        {
            InitializeComponent();


            this.dispatcherTimer = new DispatcherTimer();

            this.dispatcherTimer.Interval = TimeSpan.FromSeconds(1);

            this.dispatcherTimer.Tick += dispatcherTimer_Tick;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Protected

        #region 네비게이션 올 때 처리하기 - OnNavigatedTo(e)

        /// <summary>
        /// 네비게이션 올 때 처리하기
        /// </summary>
        /// <param name="e">이벤트 인자</param>
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);

            GpioController gpioController = GpioController.GetDefault();

            if(gpioController != null)
            {
                this.gpioPin = gpioController.OpenPin(17, GpioSharingMode.Exclusive);

                this.dht = new DHT11(this.gpioPin, GpioPinDriveMode.Input);

                this.dispatcherTimer.Start();

                this.currentDateTimeOffset = DateTimeOffset.Now;
            }
        }

        #endregion
        #region 네비게이션 갈 때 처리하기 - OnNavigatedFrom(e)

        /// <summary>
        /// 네비게이션 갈 때 처리하기
        /// </summary>
        /// <param name="e">이벤트 인자</param>
        protected override void OnNavigatedFrom(NavigationEventArgs e)
        {
            this.dispatcherTimer.Stop();

            if(this.gpioPin != null)
            {
                this.gpioPin.Dispose();

                this.gpioPin = null;
            }

            this.dht = null;

            base.OnNavigatedFrom(e);
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 디스패처 타이머 틱 처리하기 - dispatcherTimer_Tick(sender, e)

        /// <summary>
        /// 디스패처 타이머 틱 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private async void dispatcherTimer_Tick(object sender, object e)
        {
            try
            {
                this.dispatcherTimer.Stop();

                DHTReading dhtReading = await this.dht.GetReadingAsync().AsTask();

                #region 시도 건수를 표시한다.

                this.attemptCount++;

                this.attemptCountTextBlock.Text = string.Format("{0:0}", this.attemptCount);

                #endregion
                #region 평균 재시도 건수를 표시한다.

                this.retryCountList.Add(dhtReading.RetryCount);

                int averageRetryCount = 0;

                if(this.retryCountList.Count() > 0)
                {
                    averageRetryCount = (int)this.retryCountList.Average();
                }

                this.averageRetryCountTextBlock.Text = string.Format("{0:0}", averageRetryCount);

                #endregion
                #region 성공 건수를 표시한다.

                if(dhtReading.IsValid)
                {
                    this.successCount++;
                }

                this.successCountTextBlock.Text = string.Format("{0:0}", this.successCount);

                #endregion
                #region 성공율을 표시한다.

                this.successRateTextBlock.Text = attemptCount > 0 ? string.Format("{0:0.0}%", 100f * (float)this.successCount / (float)attemptCount) : "0.0%";

                #endregion
                #region 비율을 표시한다.

                double totalSecondCount = DateTimeOffset.Now.Subtract(this.currentDateTimeOffset).TotalSeconds;

                double rate = this.successCount / totalSecondCount;

                this.rateTextBlock.Text = rate < 1 ? string.Format("{0:0.00} 초/읽기", 1d / rate) : string.Format("{0:0.00} 읽기/초", rate);

                #endregion

                if(dhtReading.IsValid)
                {
                    #region 습도를 표시한다.

                    this.humidity = Convert.ToSingle(dhtReading.Humidity);

                    this.humidityTextBlock.Text = string.Format("{0:0.0}% RH", this.humidity);

                    #endregion
                    #region 온도를 표시한다.

                    this.temperature = Convert.ToSingle(dhtReading.Temperature);

                    this.temperatureTextBlock.Text = string.Format("{0:0.0} ℃", this.temperature);

                    #endregion
                    #region 최근 갱신 일시를 표시한다.

                    this.lastUpdatedOffset = DateTimeOffset.Now;

                    this.lastUpdatedOffsetTextBlock.Text = GetLastUpdatedOffsetString();

                    #endregion
                }
            }
            finally
            {
                this.dispatcherTimer.Start();
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 최근 갱신 오프셋 문자열 구하기 - GetLastUpdatedOffsetString()

        /// <summary>
        /// 최근 갱신 오프셋 문자열 구하기
        /// </summary>
        private string GetLastUpdatedOffsetString()
        {
            string returnValue = string.Empty;

            TimeSpan elapsed = DateTimeOffset.Now.Subtract(this.lastUpdatedOffset);

            if(this.lastUpdatedOffset == DateTimeOffset.MinValue)
            {
                returnValue = "미갱신";
            }
            else if(elapsed.TotalSeconds < 60d)
            {
                int totalSecondCount = (int)elapsed.TotalSeconds;

                if(totalSecondCount < 2)
                {
                    returnValue = "방금 갱신";
                }
                else
                {
                    returnValue = string.Format("{0:0} {1} 전", totalSecondCount, totalSecondCount == 1 ? "초" : "초");
                }
            }
            else if(elapsed.TotalMinutes < 60d)
            {
                int totalMinuteCount = (int)elapsed.TotalMinutes == 0 ? 1 : (int)elapsed.TotalMinutes;

                returnValue = string.Format("{0:0} {1} 전", totalMinuteCount, totalMinuteCount == 1 ? "분" : "분");
            }
            else if(elapsed.TotalHours < 24d)
            {
                int totalHourCount = (int)elapsed.TotalHours == 0 ? 1 : (int)elapsed.TotalHours;

                returnValue = string.Format("{0:0} {1} 전", totalHourCount, totalHourCount == 1 ? "시간" : "시간");
            }
            else
            {
                returnValue = "오래 전";
            }

            return returnValue;
        }

        #endregion
    }
}

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using System;

using System.Collections.Generic;

using System.Linq;

using Windows.Devices.Gpio;

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

using Windows.UI.Xaml.Navigation;

using Sensors.DHT;

namespace TestProject

{

/// <summary>

/// 메인 페이지

/// </summary>

public sealed partial class MainPage : Page

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Field

#region Field

/// <summary>

/// 디스패처 타이머

/// </summary>

private DispatcherTimer dispatcherTimer = null;

/// <summary>

/// DHT 인터페이스

/// </summary>

private IDHT dht = null;

/// <summary>

/// GPIO 핀

/// </summary>

private GpioPin gpioPin = null;

/// <summary>

/// 현재 일시 오프셋

/// </summary>

private DateTimeOffset currentDateTimeOffset = DateTimeOffset.MinValue;

/// <summary>

/// 시도 건수

/// </summary>

private int attemptCount = 0;

/// <summary>

/// 재시도 카운트 리스트

/// </summary>

private List<int> retryCountList = new List<int>();

/// <summary>

/// 성공 건수

/// </summary>

private int successCount = 0;

/// <summary>

/// 습도

/// </summary>

private float humidity = 0f;

/// <summary>

/// 온도

/// </summary>

private float temperature = 0f;

/// <summary>

/// 최근 갱신 오프셋

/// </summary>

private DateTimeOffset lastUpdatedOffset = DateTimeOffset.MinValue;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainPage()

/// <summary>

/// 생성자

/// </summary>

public MainPage()

{

InitializeComponent();

this.dispatcherTimer = new DispatcherTimer();

this.dispatcherTimer.Interval = TimeSpan.FromSeconds(1);

this.dispatcherTimer.Tick += dispatcherTimer_Tick;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Protected

#region 네비게이션 올 때 처리하기 - OnNavigatedTo(e)

/// <summary>

/// 네비게이션 올 때 처리하기

/// </summary>

/// <param name="e">이벤트 인자</param>

protected override void OnNavigatedTo(NavigationEventArgs e)

{

base.OnNavigatedTo(e);

GpioController gpioController = GpioController.GetDefault();

if(gpioController != null)

{

this.gpioPin = gpioController.OpenPin(17, GpioSharingMode.Exclusive);

this.dht = new DHT11(this.gpioPin, GpioPinDriveMode.Input);

this.dispatcherTimer.Start();

this.currentDateTimeOffset = DateTimeOffset.Now;

}

#endregion

#region 네비게이션 갈 때 처리하기 - OnNavigatedFrom(e)

/// <summary>

/// 네비게이션 갈 때 처리하기

/// </summary>

/// <param name="e">이벤트 인자</param>

protected override void OnNavigatedFrom(NavigationEventArgs e)

{

this.dispatcherTimer.Stop();

if(this.gpioPin != null)

{

this.gpioPin.Dispose();

this.gpioPin = null;

}

this.dht = null;

base.OnNavigatedFrom(e);

}

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 디스패처 타이머 틱 처리하기 - dispatcherTimer_Tick(sender, e)

/// <summary>

/// 디스패처 타이머 틱 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private async void dispatcherTimer_Tick(object sender, object e)

{

try

{

this.dispatcherTimer.Stop();

DHTReading dhtReading = await this.dht.GetReadingAsync().AsTask();

#region 시도 건수를 표시한다.

this.attemptCount++;

this.attemptCountTextBlock.Text = string.Format("{0:0}", this.attemptCount);

#endregion

#region 평균 재시도 건수를 표시한다.

this.retryCountList.Add(dhtReading.RetryCount);

int averageRetryCount = 0;

if(this.retryCountList.Count() > 0)

{

averageRetryCount = (int)this.retryCountList.Average();

}

this.averageRetryCountTextBlock.Text = string.Format("{0:0}", averageRetryCount);

#endregion

#region 성공 건수를 표시한다.

if(dhtReading.IsValid)

{

this.successCount++;

}

this.successCountTextBlock.Text = string.Format("{0:0}", this.successCount);

#endregion

#region 성공율을 표시한다.

this.successRateTextBlock.Text = attemptCount > 0 ? string.Format("{0:0.0}%", 100f * (float)this.successCount / (float)attemptCount) : "0.0%";

#endregion

#region 비율을 표시한다.

double totalSecondCount = DateTimeOffset.Now.Subtract(this.currentDateTimeOffset).TotalSeconds;

double rate = this.successCount / totalSecondCount;

this.rateTextBlock.Text = rate < 1 ? string.Format("{0:0.00} 초/읽기", 1d / rate) : string.Format("{0:0.00} 읽기/초", rate);

#endregion

if(dhtReading.IsValid)

{

#region 습도를 표시한다.

this.humidity = Convert.ToSingle(dhtReading.Humidity);

this.humidityTextBlock.Text = string.Format("{0:0.0}% RH", this.humidity);

#endregion

#region 온도를 표시한다.

this.temperature = Convert.ToSingle(dhtReading.Temperature);

this.temperatureTextBlock.Text = string.Format("{0:0.0} ℃", this.temperature);

#endregion

#region 최근 갱신 일시를 표시한다.

this.lastUpdatedOffset = DateTimeOffset.Now;

this.lastUpdatedOffsetTextBlock.Text = GetLastUpdatedOffsetString();

#endregion

}

finally

{

this.dispatcherTimer.Start();

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 최근 갱신 오프셋 문자열 구하기 - GetLastUpdatedOffsetString()

/// <summary>

/// 최근 갱신 오프셋 문자열 구하기

/// </summary>

private string GetLastUpdatedOffsetString()

{

string returnValue = string.Empty;

TimeSpan elapsed = DateTimeOffset.Now.Subtract(this.lastUpdatedOffset);

if(this.lastUpdatedOffset == DateTimeOffset.MinValue)

{

returnValue = "미갱신";

}

else if(elapsed.TotalSeconds < 60d)

{

int totalSecondCount = (int)elapsed.TotalSeconds;

if(totalSecondCount < 2)

{

returnValue = "방금 갱신";

}

else

{

returnValue = string.Format("{0:0} {1} 전", totalSecondCount, totalSecondCount == 1 ? "초" : "초");

}

else if(elapsed.TotalMinutes < 60d)

{

int totalMinuteCount = (int)elapsed.TotalMinutes == 0 ? 1 : (int)elapsed.TotalMinutes;

returnValue = string.Format("{0:0} {1} 전", totalMinuteCount, totalMinuteCount == 1 ? "분" : "분");

}

else if(elapsed.TotalHours < 24d)

{

int totalHourCount = (int)elapsed.TotalHours == 0 ? 1 : (int)elapsed.TotalHours;

returnValue = string.Format("{0:0} {1} 전", totalHourCount, totalHourCount == 1 ? "시간" : "시간");

}

else

{

returnValue = "오래 전";

}

return returnValue;

}

#endregion

}

TestApplication.zip

[C#/UWP/RASPBERRYPI] BME280 디지털 온도/기압/습도 센서 사용하기

■ BME280 디지털 온도/기압/습도 센서를 사용하는 방법을 보여준다. ▶ 부품 내역


───────────────────
구분                모델    수량  비고
─────────  ───  ──  ──
SENSOR/TEMPERATURE  BME280  1
───────────────────

───────────────────

구분 모델 수량 비고

───────── ─── ── ──

SENSOR/TEMPERATURE BME280 1

───────────────────

[회로 구성도] ▶ MainPage.xaml


<Page x:Class="TestApplication.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:TestApplication"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">
    <Page.Resources>
        <Style TargetType="TextBlock">
            <Setter Property="Margin" Value="5" />
        </Style>
    </Page.Resources>
    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <Grid
            HorizontalAlignment="Center"
            VerticalAlignment="Center">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="Auto" />
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
                <RowDefinition Height="Auto" />
            </Grid.RowDefinitions>
            <TextBlock Grid.Column="0" Grid.Row="0" Text="온도 :" />
            <TextBlock Name="temperatureTextBlock" Grid.Column="1" Grid.Row="0" />
            <TextBlock Grid.Column="0" Grid.Row="1" Text="기압 :" />
            <TextBlock Name="pressureTextBlock" Grid.Column="1" Grid.Row="1" />
            <TextBlock Grid.Column="0" Grid.Row="2" Text="습도 :" />
            <TextBlock Name="humidityTextBlock" Grid.Column="1" Grid.Row="2" />
        </Grid>
    </Grid>
</Page>

<Page x:Class="TestApplication.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:local="using:TestApplication"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

mc:Ignorable="d">

<Page.Resources>

</Style>

</Page.Resources>

<Grid

HorizontalAlignment="Center"

VerticalAlignment="Center">

<Grid.ColumnDefinitions>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

</Grid.RowDefinitions>

</Grid>

</Page>

▶ MainPage.xaml.cs


using System;
using System.Threading.Tasks;
using Windows.Devices.Enumeration;
using Windows.Devices.I2c;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

namespace TestApplication
{
    /// <summary>
    /// 메인 페이지
    /// </summary>
    public sealed partial class MainPage : Page
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Enumeration
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 보정 레지스터 주소 - CalibrationRegisterAddress

        /// <summary>
        /// 보정 레지스터 주소
        /// </summary>
        private enum CalibrationRegisterAddress : byte
        {
            DIGITAL_T1 = 0x88,
            DIGITAL_T2 = 0x8a,
            DIGITAL_T3 = 0x8c,

            DIGITAL_P1 = 0x8e,
            DIGITAL_P2 = 0x90,
            DIGITAL_P3 = 0x92,
            DIGITAL_P4 = 0x94,
            DIGITAL_P5 = 0x96,
            DIGITAL_P6 = 0x98,
            DIGITAL_P7 = 0x9a,
            DIGITAL_P8 = 0x9c,
            DIGITAL_P9 = 0x9e,

            DIGITAL_H1 = 0xa1,
            DIGITAL_H2 = 0xe1,
            DIGITAL_H3 = 0xe3,
            DIGITAL_H4 = 0xe4,
            DIGITAL_H5 = 0xe5,
            DIGITAL_H6 = 0xe7,
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// I2C 장치
        /// </summary>
        private I2cDevice i2cDevice;

        /// <summary>
        /// BME280 주소
        /// </summary>
        private byte ADDRESS_BME280 = 0x76;

        #region BME280 보정 데이터 값

        private UInt16 T1;
        private Int16  T2;
        private Int16  T3;

        private UInt16 P1;
        private Int16  P2;
        private Int16  P3;
        private Int16  P4;
        private Int16  P5;
        private Int16  P6;
        private Int16  P7;
        private Int16  P8;
        private Int16  P9;

        private byte   H1;
        private Int16  H2;
        private byte   H3;
        private Int16  H4;
        private Int16  H5;
        private Int16  H6;

        #endregion
        #region BME280 레지스터 주소

        private const byte TEMP_MSB_REGISTER_ADDRESS   = 0xfa;
        private const byte TEMP_LSB_REGISTER_ADDRESS   = 0xfb;
        private const byte TEMP_XLSB_REGISTER_ADDRESS  = 0xfc;

        private const byte PRESS_MSB_REGISTER_ADDRESS  = 0xf7;
        private const byte PRESS_LSB_REGISTER_ADDRESS  = 0xf8;
        private const byte PRESS_XLSB_REGISTER_ADDRESS = 0xf9;

        private const byte HUM_MSB_REGISTER_ADDRESS    = 0xfd;
        private const byte HUM_LSB_REGISTER_ADDRESS    = 0xfe;

        #endregion

        /// <summary>
        /// BME280 데이터 교정용
        /// </summary>
        private Int32 fineTunning = Int32.MinValue;

        /// <summary>
        /// 타이머
        /// </summary>
        private DispatcherTimer timer;

        /// <summary>
        /// 온도
        /// </summary>
        private double temperature;

        /// <summary>
        /// 기압
        /// </summary>
        private double pressure;

        /// <summary>
        /// 습도
        /// </summary>
        private double humidity;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainPage()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainPage()
        {
            this.InitializeComponent();


            InitializeDevice();


            this.timer = new DispatcherTimer();

            this.timer.Interval = TimeSpan.FromSeconds(10);

            this.timer.Tick += timer_Tick;

            this.timer.Start();
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 타이머 틱 처리하기 - timer_Tick(sender, e)

        /// <summary>
        /// 타이머 틱 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private async void timer_Tick(object sender, object e)
        {
            this.temperature = await ReadTemperatureData();
            this.pressure    = await ReadPressureData();
            this.humidity    = await ReadHumidityData();

            this.temperatureTextBlock.Text = this.temperature.ToString("F1");
            this.humidityTextBlock.Text    = this.humidity.ToString("F1");
            this.pressureTextBlock.Text    = this.pressure.ToString("F1");
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 센서 구성하기 - ConfigureSensor()

        /// <summary>
        /// 센서 구성하기
        /// </summary>
        private async Task ConfigureSensor()
        {
            uint osrs_t   = 3;
            uint osrs_p   = 3;
            uint osrs_h   = 3;
            uint mode     = 3;
            uint t_sb     = 5;
            uint filter   = 0;
            uint spi3w_en = 0;

            uint ctrl_hum  = osrs_h;
            uint ctrl_meas = (osrs_t << 5) | (osrs_p << 2) | mode;
            uint config    = (t_sb << 5) | (filter << 2) | spi3w_en;

            this.i2cDevice.Write(new byte[] { 0xf2, (byte)ctrl_hum  });
            this.i2cDevice.Write(new byte[] { 0xf4, (byte)ctrl_meas });
            this.i2cDevice.Write(new byte[] { 0xf5, (byte)config    });

            await Task.Delay(10);
        }

        #endregion
        #region 바이트 데이터 읽기 - ReadByteData(register)

        /// <summary>
        /// 바이트 데이터 읽기
        /// </summary>
        /// <param name="register">레지스터</param>
        /// <returns>바이트 데이터</returns>
        private byte ReadByteData(byte register)
        {
            byte[] writeByteArray = new byte[] { 0x00 };
            byte[] readByteArray  = new byte[] { 0x00 };

            writeByteArray[0] = register;

            this.i2cDevice.WriteRead(writeByteArray, readByteArray);

            return readByteArray[0];
        }

        #endregion
        #region UINT16 데이터 읽기 - ReadUInt16Data(register)

        /// <summary>
        /// UINT16 데이터 읽기
        /// </summary>
        /// <param name="register">레지스터</param>
        /// <returns>UINT16 데이터</returns>
        private UInt16 ReadUInt16Data(byte register)
        {
            byte[] writeByteArray = new byte[] { 0x00 };
            byte[] readByteArray  = new byte[] { 0x00, 0x00 };

            writeByteArray[0] = register;

            this.i2cDevice.WriteRead(writeByteArray, readByteArray);

            int highValue = readByteArray[1] << 8;
            int lowValue  = readByteArray[0];

            return (UInt16)(highValue + lowValue);
        }

        #endregion
        #region 보정 데이터 설정하기 - SetCalibrationData()

        /// <summary>
        /// 보정 데이터 설정하기
        /// </summary>
        private void SetCalibrationData()
        {
            // 온도
            this.T1 = ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_T1);
            this.T2 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_T2);
            this.T3 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_T3);

            // 기압
            this.P1 = ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P1);
            this.P2 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P2);
            this.P3 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P3);
            this.P4 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P4);
            this.P5 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P5);
            this.P6 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P6);
            this.P7 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P7);
            this.P8 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P8);
            this.P9 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P9);

            //습도
            this.H1 = ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H1);
            this.H2 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_H2);
            this.H3 = ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H3);
            this.H4 = (Int16)(ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H4) << 4 | ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H4 + 1) & 0xf);
            this.H5 = (Int16)(ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H5 + 1) << 4 | ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H5) >> 4);
            this.H6 = (Int16)ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H6);
        }

        #endregion
        #region 장치 초기화 하기 - InitializeDevice()

        /// <summary>
        /// 장치 초기화 하기
        /// </summary>
        private async void InitializeDevice()
        {
            string advancedQuerySyntax = I2cDevice.GetDeviceSelector("I2C1");

            DeviceInformationCollection deviceInformationCollection = await DeviceInformation.FindAllAsync(advancedQuerySyntax);

            I2cConnectionSettings i2cConnectionSettings = new I2cConnectionSettings(ADDRESS_BME280);

            i2cConnectionSettings.BusSpeed = I2cBusSpeed.FastMode;

            this.i2cDevice = await I2cDevice.FromIdAsync(deviceInformationCollection[0].Id, i2cConnectionSettings);

            await ConfigureSensor();

            SetCalibrationData();
        }

        #endregion

        #region 온도 데이터 읽기 - ReadTemperatureData()

        /// <summary>
        /// 온도 데이터 읽기
        /// </summary>
        /// <returns>온도 데이터</returns>
        private async Task<double> ReadTemperatureData()
        {
            byte temp_msb  = ReadByteData(TEMP_MSB_REGISTER_ADDRESS );
            byte temp_lsb  = ReadByteData(TEMP_LSB_REGISTER_ADDRESS );
            byte temp_xlsb = ReadByteData(TEMP_XLSB_REGISTER_ADDRESS);

            Int32 rawValue = (temp_msb << 12) | (temp_lsb << 4) | (temp_xlsb >> 4);

            double value1;
            double value2;
            double temperature;

            value1 = ((rawValue / 16384.0 ) - (T1 / 1024.0)) * T2;
            value2 = ((rawValue / 131072.0) - (T1 / 8192.0)) * T3;

            this.fineTunning = (Int32)(value1 + value2);

            temperature = (value1 + value2) / 5120.0;

            await Task.Delay(1);

            return temperature;
        }

        #endregion
        #region 기압 데이터 읽기 - ReadAtmosphericPressureData()

        /// <summary>
        /// 기압 데이터 읽기
        /// </summary>
        /// <returns>기압 데이터</returns>
        private async Task<double> ReadPressureData()
        {
            /*
            if(this.fineTunning == Int32.MinValue)
            {
                this.temperature = await ReadTemperatureData();
            }
            */

            byte press_msb  = ReadByteData(PRESS_MSB_REGISTER_ADDRESS );
            byte press_lsb  = ReadByteData(PRESS_LSB_REGISTER_ADDRESS );
            byte press_xlsb = ReadByteData(PRESS_XLSB_REGISTER_ADDRESS);

            Int32 rawPressure = (press_msb << 12) | (press_lsb << 4) | (press_xlsb >> 4);

            Int64 value1;
            Int64 value2;
            Int64 pressure;

            value1 = fineTunning - 128000;
            value2 = value1 * value1 * (Int64)P6;
            value2 = value2 + ((value1 * (Int64)P5) << 17);
            value2 = value2 + ((Int64)P4 << 35);
            value1 = ((value1 * value1 * (Int64)P3) >> 8) + ((value1 * (Int64)P2) << 12);
            value1 = (((((Int64)1 << 47) + value1)) * (Int64)P1) >> 33;

            if(value1 == 0)
            {
                return 0;
            }

            pressure = 1048576 - rawPressure;
            pressure = (((pressure << 31) - value2) * 3125) / value1;

            value1 = ((Int64)P9 * (pressure >> 13)) >> 25;
            value2 = ((Int64)P8 * pressure) >> 19;

            pressure = ((pressure + value1 + value2) >> 8) + ((Int64)P7 << 4);

            await Task.Delay(1);

            return (double)(pressure / 256 / 100);
        }

        #endregion
        #region 습도 데이터 읽기 - ReadHumidityData()

        /// <summary>
        /// 습도 데이터 읽기
        /// </summary>
        /// <returns>습도 데이터</returns>
        private async Task<double> ReadHumidityData()
        {
            byte hum_msb = ReadByteData(HUM_MSB_REGISTER_ADDRESS);
            byte hum_lsb = ReadByteData(HUM_LSB_REGISTER_ADDRESS);

            int rawHumidity = (hum_msb << 8) | hum_lsb;

            Int32 humidity;

            humidity = fineTunning - 76800;
            humidity = (((((rawHumidity << 14) - (((Int32)H4) << 20) - ((Int32)H5 * humidity)) + ((Int32)16384)) >> 15) *
                (((((((humidity * ((Int32)H6)) >> 10) * (((humidity * ((Int32)H3)) >> 11) + ((Int32)32768))) >> 10) + ((Int32)2097152)) * ((Int32)H2) + 8192) >> 14));
            humidity = (humidity - (((((humidity >> 15) * (humidity >> 15)) >> 7) * ((Int32)H1)) >> 4));
            humidity = (humidity < 0 ? 0 : humidity);
            humidity = (humidity > 419430400 ? 419430400 : humidity);

            await Task.Delay(1);

            return (UInt32)((humidity >> 12) / 1000);
        }

        #endregion
    }
}

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using System;

using System.Threading.Tasks;

using Windows.Devices.Enumeration;

using Windows.Devices.I2c;

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

namespace TestApplication

{

/// <summary>

/// 메인 페이지

/// </summary>

public sealed partial class MainPage : Page

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Enumeration

////////////////////////////////////////////////////////////////////////////////////////// Private

#region 보정 레지스터 주소 - CalibrationRegisterAddress

/// <summary>

/// 보정 레지스터 주소

/// </summary>

private enum CalibrationRegisterAddress : byte

{

DIGITAL_T1 = 0x88,

DIGITAL_T2 = 0x8a,

DIGITAL_T3 = 0x8c,

DIGITAL_P1 = 0x8e,

DIGITAL_P2 = 0x90,

DIGITAL_P3 = 0x92,

DIGITAL_P4 = 0x94,

DIGITAL_P5 = 0x96,

DIGITAL_P6 = 0x98,

DIGITAL_P7 = 0x9a,

DIGITAL_P8 = 0x9c,

DIGITAL_P9 = 0x9e,

DIGITAL_H1 = 0xa1,

DIGITAL_H2 = 0xe1,

DIGITAL_H3 = 0xe3,

DIGITAL_H4 = 0xe4,

DIGITAL_H5 = 0xe5,

DIGITAL_H6 = 0xe7,

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// I2C 장치

/// </summary>

private I2cDevice i2cDevice;

/// <summary>

/// BME280 주소

/// </summary>

private byte ADDRESS_BME280 = 0x76;

#region BME280 보정 데이터 값

private UInt16 T1;

private Int16 T2;

private Int16 T3;

private UInt16 P1;

private Int16 P2;

private Int16 P3;

private Int16 P4;

private Int16 P5;

private Int16 P6;

private Int16 P7;

private Int16 P8;

private Int16 P9;

private byte H1;

private Int16 H2;

private byte H3;

private Int16 H4;

private Int16 H5;

private Int16 H6;

#endregion

#region BME280 레지스터 주소

private const byte TEMP_MSB_REGISTER_ADDRESS = 0xfa;

private const byte TEMP_LSB_REGISTER_ADDRESS = 0xfb;

private const byte TEMP_XLSB_REGISTER_ADDRESS = 0xfc;

private const byte PRESS_MSB_REGISTER_ADDRESS = 0xf7;

private const byte PRESS_LSB_REGISTER_ADDRESS = 0xf8;

private const byte PRESS_XLSB_REGISTER_ADDRESS = 0xf9;

private const byte HUM_MSB_REGISTER_ADDRESS = 0xfd;

private const byte HUM_LSB_REGISTER_ADDRESS = 0xfe;

#endregion

/// <summary>

/// BME280 데이터 교정용

/// </summary>

private Int32 fineTunning = Int32.MinValue;

/// <summary>

/// 타이머

/// </summary>

private DispatcherTimer timer;

/// <summary>

/// 온도

/// </summary>

private double temperature;

/// <summary>

/// 기압

/// </summary>

private double pressure;

/// <summary>

/// 습도

/// </summary>

private double humidity;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainPage()

/// <summary>

/// 생성자

/// </summary>

public MainPage()

{

this.InitializeComponent();

InitializeDevice();

this.timer = new DispatcherTimer();

this.timer.Interval = TimeSpan.FromSeconds(10);

this.timer.Tick += timer_Tick;

this.timer.Start();

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 타이머 틱 처리하기 - timer_Tick(sender, e)

/// <summary>

/// 타이머 틱 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private async void timer_Tick(object sender, object e)

{

this.temperature = await ReadTemperatureData();

this.pressure = await ReadPressureData();

this.humidity = await ReadHumidityData();

this.temperatureTextBlock.Text = this.temperature.ToString("F1");

this.humidityTextBlock.Text = this.humidity.ToString("F1");

this.pressureTextBlock.Text = this.pressure.ToString("F1");

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 센서 구성하기 - ConfigureSensor()

/// <summary>

/// 센서 구성하기

/// </summary>

private async Task ConfigureSensor()

{

uint osrs_t = 3;

uint osrs_p = 3;

uint osrs_h = 3;

uint mode = 3;

uint t_sb = 5;

uint filter = 0;

uint spi3w_en = 0;

uint ctrl_hum = osrs_h;

uint ctrl_meas = (osrs_t << 5) | (osrs_p << 2) | mode;

uint config = (t_sb << 5) | (filter << 2) | spi3w_en;

this.i2cDevice.Write(new byte[] { 0xf2, (byte)ctrl_hum });

this.i2cDevice.Write(new byte[] { 0xf4, (byte)ctrl_meas });

this.i2cDevice.Write(new byte[] { 0xf5, (byte)config });

await Task.Delay(10);

}

#endregion

#region 바이트 데이터 읽기 - ReadByteData(register)

/// <summary>

/// 바이트 데이터 읽기

/// </summary>

/// <param name="register">레지스터</param>

/// <returns>바이트 데이터</returns>

private byte ReadByteData(byte register)

{

byte[] writeByteArray = new byte[] { 0x00 };

byte[] readByteArray = new byte[] { 0x00 };

writeByteArray[0] = register;

this.i2cDevice.WriteRead(writeByteArray, readByteArray);

return readByteArray[0];

}

#endregion

#region UINT16 데이터 읽기 - ReadUInt16Data(register)

/// <summary>

/// UINT16 데이터 읽기

/// </summary>

/// <param name="register">레지스터</param>

/// <returns>UINT16 데이터</returns>

private UInt16 ReadUInt16Data(byte register)

{

byte[] writeByteArray = new byte[] { 0x00 };

byte[] readByteArray = new byte[] { 0x00, 0x00 };

writeByteArray[0] = register;

this.i2cDevice.WriteRead(writeByteArray, readByteArray);

int highValue = readByteArray[1] << 8;

int lowValue = readByteArray[0];

return (UInt16)(highValue + lowValue);

}

#endregion

#region 보정 데이터 설정하기 - SetCalibrationData()

/// <summary>

/// 보정 데이터 설정하기

/// </summary>

private void SetCalibrationData()

{

// 온도

this.T1 = ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_T1);

this.T2 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_T2);

this.T3 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_T3);

// 기압

this.P1 = ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P1);

this.P2 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P2);

this.P3 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P3);

this.P4 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P4);

this.P5 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P5);

this.P6 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P6);

this.P7 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P7);

this.P8 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P8);

this.P9 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_P9);

//습도

this.H1 = ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H1);

this.H2 = (Int16)ReadUInt16Data((byte)CalibrationRegisterAddress.DIGITAL_H2);

this.H3 = ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H3);

this.H4 = (Int16)(ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H4) << 4 | ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H4 + 1) & 0xf);

this.H5 = (Int16)(ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H5 + 1) << 4 | ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H5) >> 4);

this.H6 = (Int16)ReadByteData((byte)CalibrationRegisterAddress.DIGITAL_H6);

}

#endregion

#region 장치 초기화 하기 - InitializeDevice()

/// <summary>

/// 장치 초기화 하기

/// </summary>

private async void InitializeDevice()

{

string advancedQuerySyntax = I2cDevice.GetDeviceSelector("I2C1");

DeviceInformationCollection deviceInformationCollection = await DeviceInformation.FindAllAsync(advancedQuerySyntax);

I2cConnectionSettings i2cConnectionSettings = new I2cConnectionSettings(ADDRESS_BME280);

i2cConnectionSettings.BusSpeed = I2cBusSpeed.FastMode;

this.i2cDevice = await I2cDevice.FromIdAsync(deviceInformationCollection[0].Id, i2cConnectionSettings);

await ConfigureSensor();

SetCalibrationData();

}

#endregion

#region 온도 데이터 읽기 - ReadTemperatureData()

/// <summary>

/// 온도 데이터 읽기

/// </summary>

/// <returns>온도 데이터</returns>

private async Task<double> ReadTemperatureData()

{

byte temp_msb = ReadByteData(TEMP_MSB_REGISTER_ADDRESS );

byte temp_lsb = ReadByteData(TEMP_LSB_REGISTER_ADDRESS );

byte temp_xlsb = ReadByteData(TEMP_XLSB_REGISTER_ADDRESS);

Int32 rawValue = (temp_msb << 12) | (temp_lsb << 4) | (temp_xlsb >> 4);

double value1;

double value2;

double temperature;

value1 = ((rawValue / 16384.0 ) - (T1 / 1024.0)) * T2;

value2 = ((rawValue / 131072.0) - (T1 / 8192.0)) * T3;

this.fineTunning = (Int32)(value1 + value2);

temperature = (value1 + value2) / 5120.0;

await Task.Delay(1);

return temperature;

}

#endregion

#region 기압 데이터 읽기 - ReadAtmosphericPressureData()

/// <summary>

/// 기압 데이터 읽기

/// </summary>

/// <returns>기압 데이터</returns>

private async Task<double> ReadPressureData()

{

if(this.fineTunning == Int32.MinValue)

{

this.temperature = await ReadTemperatureData();

}

byte press_msb = ReadByteData(PRESS_MSB_REGISTER_ADDRESS );

byte press_lsb = ReadByteData(PRESS_LSB_REGISTER_ADDRESS );

byte press_xlsb = ReadByteData(PRESS_XLSB_REGISTER_ADDRESS);

Int32 rawPressure = (press_msb << 12) | (press_lsb << 4) | (press_xlsb >> 4);

Int64 value1;

Int64 value2;

Int64 pressure;

value1 = fineTunning - 128000;

value2 = value1 * value1 * (Int64)P6;

value2 = value2 + ((value1 * (Int64)P5) << 17);

value2 = value2 + ((Int64)P4 << 35);

value1 = ((value1 * value1 * (Int64)P3) >> 8) + ((value1 * (Int64)P2) << 12);

value1 = (((((Int64)1 << 47) + value1)) * (Int64)P1) >> 33;

if(value1 == 0)

{

return 0;

}

pressure = 1048576 - rawPressure;

pressure = (((pressure << 31) - value2) * 3125) / value1;

value1 = ((Int64)P9 * (pressure >> 13)) >> 25;

value2 = ((Int64)P8 * pressure) >> 19;

pressure = ((pressure + value1 + value2) >> 8) + ((Int64)P7 << 4);

await Task.Delay(1);

return (double)(pressure / 256 / 100);

}

#endregion

#region 습도 데이터 읽기 - ReadHumidityData()

/// <summary>

/// 습도 데이터 읽기

/// </summary>

/// <returns>습도 데이터</returns>

private async Task<double> ReadHumidityData()

{

byte hum_msb = ReadByteData(HUM_MSB_REGISTER_ADDRESS);

byte hum_lsb = ReadByteData(HUM_LSB_REGISTER_ADDRESS);

int rawHumidity = (hum_msb << 8) | hum_lsb;

Int32 humidity;

humidity = fineTunning - 76800;

humidity = (((((rawHumidity << 14) - (((Int32)H4) << 20) - ((Int32)H5 * humidity)) + ((Int32)16384)) >> 15) *

(((((((humidity * ((Int32)H6)) >> 10) * (((humidity * ((Int32)H3)) >> 11) + ((Int32)32768))) >> 10) + ((Int32)2097152)) * ((Int32)H2) + 8192) >> 14));

humidity = (humidity - (((((humidity >> 15) * (humidity >> 15)) >> 7) * ((Int32)H1)) >> 4));

humidity = (humidity < 0 ? 0 : humidity);

humidity = (humidity > 419430400 ? 419430400 : humidity);

await Task.Delay(1);

return (UInt32)((humidity >> 12) / 1000);

}

#endregion

}

TestApplication.zip

[ARDUINO] 온습도 센서(Temperature-Humidity Sensor) 사용하기

■ 온습도 센서(Temperature-Humidity Sensor)를 사용하는 방법을 보여준다. ▶ 부품 내역


──────────────────
구분              모델    수량  비고
────────  ───  ──  ──
SENSOR/HUMIDITY   DHT11   1
──────────────────

──────────────────

구분 모델 수량 비고

──────── ─── ── ──

SENSOR/HUMIDITY DHT11 1

──────────────────

▶ 소스 코드


#include <DHT11.h>

int pin = 2;

DHT11 dht11(pin);

void setup()
{
    Serial.begin(9600);
}

void loop()
{
    int   errorCode;
    float temperature; // 온도
    float humidity;    // 습도

    if((errorCode = dht11.read(humidity, temperature)) == 0)
    {
        Serial.print("Temperature : ");

        Serial.print(temperature);

        Serial.print(" Humidity : ");

        Serial.print(humidity);

        Serial.println();
    }

    delay(1000);
}

#include <DHT11.h>

int pin = 2;

DHT11 dht11(pin);

void setup()

{

Serial.begin(9600);

}

void loop()

{

int errorCode;

float temperature; // 온도

float humidity; // 습도

if((errorCode = dht11.read(humidity, temperature)) == 0)

{

Serial.print("Temperature : ");

Serial.print(temperature);

Serial.print(" Humidity : ");

Serial.print(humidity);

Serial.println();

}

delay(1000);

}