如何通过C++开发实现智能家居应用？

#include <iostream>
#include "DHT11.h"

int main() {
    DHT11 dht;
    if (dht.readData() != 0) {
        std::cout << "Failed to read data from DHT11 sensor." << std::endl;
    }
    
    double temperature = dht.getTemperature();
    double humidity = dht.getHumidity();
    double brightness = dht.getBrightness();
    
    std::cout << "Temperature: " << temperature << "℃" << std::endl;
    std::cout << "Humidity: " << humidity << "%" << std::endl;
    std::cout << "Brightness: " << brightness << "lx" << std::endl;
    
    return 0;
}

#include <iostream>
#include "SerialPort.h"

int main() {
    SerialPort serialPort("/dev/ttyUSB0"); // 假设串口设备为ttyUSB0
    
    if (!serialPort.open()) {
        std::cout << "Failed to open serial port." << std::endl;
    }
    
    // 发送控制指令给智能设备
    serialPort.write("turn_on_light");
    
    // 接收智能设备的响应
    std::string response = serialPort.read();
    std::cout << "Response from smart device: " << response << std::endl;
    
    return 0;
}

#include <iostream>
#include "opencv2/opencv.hpp"

int main() {
    cv::VideoCapture camera(0); // 0代表默认摄像头设备
    
    if (!camera.isOpened()) {
        std::cout << "Failed to open camera." << std::endl;
    }
    
    cv::Mat frame;
    camera.read(frame);
    
    cv::imshow("Security Monitoring", frame);
    cv::waitKey(0);
    
    return 0;
}

#include <iostream>
#include <mysql_driver.h>
#include <mysql_connection.h>

int main() {
    sql::mysql::MySQL_Driver *driver;
    sql::Connection *con;
    
    driver = sql::mysql::get_mysql_driver_instance();
    con = driver->connect("tcp://127.0.0.1:3306", "user", "password"); // 假设数据库连接信息为本地IP、用户名和密码
    
    if (!con->isValid()) {
        std::cout << "Failed to connect to database." << std::endl;
    }
    
    sql::Statement *stmt;
    stmt = con->createStatement();
    stmt->execute("INSERT INTO energy_usage (date, time, usage) VALUES ('2022-09-01', '12:00:00', 100)");
    
    delete stmt;
    delete con;
    
    return 0;
}