写一个在树莓派中QT中采用wiringPi实现DHT11温湿度监测的程序

好的，以下是一个简单的在树莓派中使用QT和wiringPi实现DHT11温湿度监测的程序：

#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <unistd.h>
#include <sys/time.h>
#include <QCoreApplication>
#include <QTimer>

#define MAX_TIMINGS 85
#define DHT_PIN 7  // 根据实际接口进行修改

int data[5] = { 0, 0, 0, 0, 0 };

void read_dht_data()
{
    uint8_t laststate = HIGH;
    uint8_t counter = 0;
    uint8_t j = 0, i;

    data[0] = data[1] = data[2] = data[3] = data[4] = 0;

    pinMode(DHT_PIN, OUTPUT);
    digitalWrite(DHT_PIN, LOW);
    delay(18);
    digitalWrite(DHT_PIN, HIGH);
    delayMicroseconds(30);
    pinMode(DHT_PIN, INPUT);

    for (i = 0; i < MAX_TIMINGS; i++)
    {
        counter = 0;
        while (digitalRead(DHT_PIN) == laststate)
        {
            counter++;
            delayMicroseconds(1);
            if (counter == 255)
            {
                break;
            }
        }

        laststate = digitalRead(DHT_PIN);

        if (counter == 255)
        {
            break;
        }

        if ((i >= 4) && (i % 2 == 0))
        {
            data[j / 8] <<= 1;
            if (counter > 16)
            {
                data[j / 8] |= 1;
            }
            j++;
        }
    }

    if ((j >= 40) && (data[4] == ((data[0] + data[1] + data[2] + data[3]) & 0xFF)))
    {
        float h = (float)((data[0] << 8) + data[1]) / 10;
        float c = (float)(((data[2] & 0x7F) << 8) + data[3]) / 10;
        if (data[2] & 0x80)
        {
            c = -c;
        }
        printf("Humidity = %.1f %% Temperature = %.1f *C \n", h, c);
    }
    else
    {
        printf("Data not good, skip\n");
    }
}

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);
    QTimer *timer = new QTimer(&app);
    QObject::connect(timer, SIGNAL(timeout()), &app, SLOT(quit()));
    timer->start(5000);

    if (wiringPiSetup() == -1)
    {
        fprintf(stderr, "Failed to initialize wiringPi: %s\n", strerror(errno));
        return 1;
    }

    while (1)
    {
        read_dht_data();
        delay(2000);
    }

    return app.exec();
}

这个程序会每隔5秒读取一次DHT11传感器的数据，并且将温度和湿度数据输出到控制台上。程序中使用了wiringPi库来读取GPIO口的状态。注意：在程序中修改DHT_PIN的值以对应实际的GPIO口。