qt-ble-test.cpp

#include <QCoreApplication>
#include <QDebug>
#include <QLowEnergyService>
#include <QLowEnergyController>

QLowEnergyService *service;

static void stateChanged(QLowEnergyService::ServiceState newState)
{
    qDebug() << "stateChanged:" << newState;

    if (newState != QLowEnergyService::ServiceDiscovered)
        return;

    QList<QLowEnergyCharacteristic>	chars = service->characteristics();
    qDebug() << "service->characteristics().length():" << chars.length();
    foreach(QLowEnergyCharacteristic c, chars) {
        qDebug() << "char: " << c.name() << c.value() << c.properties();
        if (c.properties() & QLowEnergyCharacteristic::Read) {
            qDebug() << "read";
            service->readCharacteristic(c);
        }
        if (c.properties() & QLowEnergyCharacteristic::Write || c.properties() & QLowEnergyCharacteristic::WriteNoResponse) {
            qDebug() << "write";
            const char data[1] = { 1 };
            service->writeCharacteristic(c, QByteArray(data));
        }
    }
}

static void charRead(const QLowEnergyCharacteristic &characteristic, const QByteArray &value)
{
    qDebug() << "char read------------";
    qDebug() << characteristic.name();
    qDebug() << value;
}

static void charWrite(const QLowEnergyCharacteristic &characteristic, const QByteArray &value)
{
    qDebug() << "char write------------";
    qDebug() << characteristic.name();
    qDebug() << value;
}

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

    qDebug() << "main start";

    QBluetoothAddress addr(QString("00:80:25:34:CE:0E"));
    QBluetoothDeviceInfo currentDevice(addr, QString("test device"), 0);
    QLowEnergyController *control = new QLowEnergyController(currentDevice);
    control->connectToDevice();
    control->discoverServices();

    QList<QBluetoothUuid> list = control->services();

    int idx = 0;
    foreach (QBluetoothUuid uuid, list) {
        qDebug() << idx << uuid;
        idx++;
    }

    // NOTE!!! pick the UUID here
    QBluetoothUuid uuid = list.at(0);
    qDebug() << "creating service for UUID:" << uuid;
    service = control->createServiceObject(uuid);
    if (!service) {
        qWarning() << "cannot create service";
        return 1;
    }

    // control->disconnectFromDevice();
    QObject::connect(service, &QLowEnergyService::stateChanged, stateChanged);
    QObject::connect(service, &QLowEnergyService::characteristicRead, charRead);
    QObject::connect(service, &QLowEnergyService::characteristicWritten, charWrite);
    qDebug() << "state:" << service->state();

    qDebug() << "here";

    service->discoverDetails();

    qDebug() << "main end";

    return a.exec();
}