QT实现一个智能家居系统，包括温湿度、红外遥控、光照等代码实现

实现智能家居系统需要涉及到硬件和软件两个方面，其中硬件需要使用传感器、红外遥控器等设备，而软件则需要使用QT开发框架实现。

以下是一个简单的智能家居系统的代码实现：

温湿度传感器部分：

#include "dht11.h"
#include <wiringPi.h>
#include <QDebug>

DHT11::DHT11()
{
    pinMode(DHT11PIN,OUTPUT);
    digitalWrite(DHT11PIN,HIGH);
}

DHT11::~DHT11()
{

}

int DHT11::readData(float* temperature,float* humidity)
{
    uint8_t bitsData[5];
    uint8_t bitsCount = 0;
    uint8_t byteCount = 0;

    memset(bitsData,0,sizeof(bitsData));

    pinMode(DHT11PIN,OUTPUT);
    digitalWrite(DHT11PIN,LOW);
    delay(18);
    digitalWrite(DHT11PIN,HIGH);
    delayMicroseconds(40);
    pinMode(DHT11PIN,INPUT);

    uint8_t maxWait = 200;
    uint8_t counter = 0;
    while(digitalRead(DHT11PIN) == HIGH && counter < maxWait){
        counter++;
        delayMicroseconds(1);
    }

    if(counter == maxWait){
        return -1;
    }

    counter = 0;
    while(digitalRead(DHT11PIN) == LOW && counter < maxWait){
        counter++;
        delayMicroseconds(1);
    }

    if(counter == maxWait){
        return -1;
    }

    counter = 0;
    while(digitalRead(DHT11PIN) == HIGH && counter < maxWait){
        counter++;
        delayMicroseconds(1);
    }

    if(counter == maxWait){
        return -1;
    }

    for(uint8_t i = 0; i < 40; i++){
        counter = 0;
        while(digitalRead(DHT11PIN) == LOW && counter < maxWait){
            counter++;
            delayMicroseconds(1);
        }

        if(counter == maxWait){
            return -1;
        }

        counter = 0;
        while(digitalRead(DHT11PIN) == HIGH && counter < maxWait){
            counter++;
            delayMicroseconds(1);
        }

        if(counter == maxWait){
            return -1;
        }

        bitsCount++;
        if(counter > 50){
            bitsData[byteCount] |= (1 << (8 - bitsCount));
        }

        if(bitsCount == 8){
            bitsCount = 0;
            byteCount++;
        }
    }

    if((bitsData[0] + bitsData[1] + bitsData[2] + bitsData[3]) != bitsData[4]){
        return -1;
    }

    *humidity = (float)bitsData[0] + ((float)bitsData[1] / 10.0);
    *temperature = (float)bitsData[2] + ((float)bitsData[3] / 10.0);

    return 0;
}

红外遥控部分：

#include "infrared.h"
#include <wiringPi.h>

Infrared::Infrared()
{
    wiringPiSetup();
    pinMode(IRPIN,INPUT);
}

Infrared::~Infrared()
{

}

int Infrared::getKeyValue(unsigned long* value)
{
    unsigned long result = 0;

    while(digitalRead(IRPIN) == HIGH);

    int counter = 0;
    while(digitalRead(IRPIN) == LOW){
        counter++;
        delayMicroseconds(1);
    }

    if(counter < 8){
        return -1;
    }

    counter = 0;
    while(digitalRead(IRPIN) == HIGH){
        counter++;
        delayMicroseconds(1);
    }

    if(counter < 8){
        return -1;
    }

    for(int i = 0; i < 32; i++){
        counter = 0;
        while(digitalRead(IRPIN) == LOW){
            counter++;
            delayMicroseconds(1);
        }

        if(counter < 8){
            return -1;
        }

        counter = 0;
        while(digitalRead(IRPIN) == HIGH){
            counter++;
            delayMicroseconds(1);
        }

        if(counter > 8){
            result |= (1 << (31 - i));
        }
    }

    *value = result;

    return 0;
}

光照传感器部分：

#include "light.h"
#include <wiringPi.h>
#include <QDebug>

Light::Light()
{
    wiringPiSetup();
}

Light::~Light()
{

}

int Light::readData(unsigned int* value)
{
    pinMode(LIGHTPIN,OUTPUT);
    digitalWrite(LIGHTPIN,LOW);
    delay(1);
    pinMode(LIGHTPIN,INPUT);

    *value = analogRead(LIGHTPIN);

    return 0;
}

以上是硬件部分的代码实现，接下来是QT界面部分的代码实现：

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "dht11.h"
#include "infrared.h"
#include "light.h"
#include <QDebug>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    m_timer = new QTimer(this);
    connect(m_timer,SIGNAL(timeout()),this,SLOT(onTimer()));
    m_timer->start(1000);

    m_dht11 = new DHT11();
    m_infrared = new Infrared();
    m_light = new Light();
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::onTimer()
{
    float temperature = 0.0;
    float humidity = 0.0;
    unsigned long value = 0;
    unsigned int light = 0;

    if(m_dht11->readData(&temperature,&humidity) == 0){
        ui->label_temperature->setText(QString::number(temperature));
        ui->label_humidity->setText(QString::number(humidity));
    }

    if(m_infrared->getKeyValue(&value) == 0){
        ui->label_infrared->setText(QString::number(value));
    }

    if(m_light->readData(&light) == 0){
        ui->label_light->setText(QString::number(light));
    }
}

void MainWindow::on_pushButton_clicked()
{
    unsigned long value = 0;

    if(m_infrared->getKeyValue(&value) == 0){
        QString text = QString("红外遥控器按键值：") + QString::number(value);
        qDebug() << text;
    }
}

在QT界面部分，我们通过定时器来定时读取传感器的数据，并将其显示在界面上。同时，我们还添加了一个按钮，用于测试红外遥控器的按键值。

以上就是一个简单的智能家居系统的代码实现，该系统可以实现温湿度、红外遥控、光照等功能。