帮我用qt写一个低功耗蓝牙BLE的代码

好的，我可以回答这个问题。以下是使用 Qt 编写低功耗蓝牙 BLE 的代码示例：

#include <QBluetoothDeviceDiscoveryAgent>
#include <QBluetoothLocalDevice>
#include <QBluetoothServiceDiscoveryAgent>
#include <QBluetoothSocket>
#include <QCoreApplication>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication app(argc, argv);

    // 获取本地蓝牙设备
    QBluetoothLocalDevice localDevice;
    if (!localDevice.isValid()) {
        qDebug() << "本地蓝牙设备无效";
        return 1;
    }

    // 打开本地蓝牙设备
    if (!localDevice.powerOn()) {
        qDebug() << "无法打开本地蓝牙设备";
        return 1;
    }

    // 开始搜索 BLE 设备
    QBluetoothDeviceDiscoveryAgent discoveryAgent;
    discoveryAgent.setLowEnergyDiscoveryTimeout(500); // 设置搜索时间为 5 秒
    QObject::connect(&discoveryAgent, &QBluetoothDeviceDiscoveryAgent::deviceDiscovered, [&](const QBluetoothDeviceInfo &deviceInfo) {
        qDebug() << "发现 BLE 设备：" << deviceInfo.name() << deviceInfo.address().toString();
    });
    discoveryAgent.start(QBluetoothDeviceDiscoveryAgent::LowEnergyMethod);

    // 开始搜索 BLE 服务
    QBluetoothServiceDiscoveryAgent serviceAgent;
    QObject::connect(&serviceAgent, &QBluetoothServiceDiscoveryAgent::serviceDiscovered, [&](const QBluetoothServiceInfo &serviceInfo) {
        qDebug() << "发现 BLE 服务：" << serviceInfo.serviceName() << serviceInfo.serviceUuid().toString();
    });
    serviceAgent.start();

    return app.exec();
}

这是一个简单的 BLE 设备和服务搜索示例，你可以根据自己的需求进行修改和扩展。