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qtconnectivity/tests/bluetoothtestdevice/bluetoothtestdevice.cpp

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include <QBluetoothLocalDevice>
#include <QLatin1String>
#include <QLoggingCategory>
#include <QLowEnergyAdvertisingData>
#include <QLowEnergyAdvertisingParameters>
#include <QLowEnergyCharacteristicData>
#include <QLowEnergyController>
#include <QLowEnergyDescriptorData>
#include <QLowEnergyServiceData>
#include <QLowEnergyDescriptorData>
#include <QTimer>
#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
#include <QGuiApplication>
#else
#include <QCoreApplication>
#endif // Q_OS_ANDROID || Q_OS_IOS
#include <thread>
static const QLatin1String largeAttributeServiceUuid("1f85e37c-ac16-11eb-ae5c-93d3a763feed");
static const QLatin1String largeAttributeCharUuid("40e4f68e-ac16-11eb-9956-cfe55a8c370c");
static const QLatin1String largeAttributeDescUuid("44e4f68e-ac16-11eb-9956-cfe55a8c370c");
static constexpr qsizetype largeAttributeSize{508}; // Size for char and desc values
static const QLatin1String platformIdentifierServiceUuid("4a92cb7f-5031-4a09-8304-3e89413f458d");
static const QLatin1String platformIdentifierCharUuid("6b0ecf7c-5f09-4c87-aaab-bb49d5d383aa");
static const QLatin1String
notificationIndicationTestServiceUuid("bb137ac5-5716-4b80-873b-e2d11d29efe2");
static const QLatin1String
notificationIndicationTestChar1Uuid("6da4d652-0248-478a-a5a8-1e2f076158cc");
static const QLatin1String
notificationIndicationTestChar2Uuid("990930f0-b9cc-4c27-8c1b-ebc2bcae5c95");
static const QLatin1String
notificationIndicationTestChar3Uuid("9a60486b-de5b-4e03-b914-4e158c0bd388");
static const QLatin1String
notificationIndicationTestChar4Uuid("d92435d4-6c2e-43f8-a6be-bbb66b5a3e28");
static const QLatin1String connectionCountServiceUuid("78c61a07-a0f9-4b92-be2d-2570d8dbf010");
static const QLatin1String connectionCountCharUuid("9414ec2d-792f-46a2-a19e-186d0fb38a08");
static const QLatin1String mtuServiceUuid("9a9483eb-cf4f-4c32-9a6b-794238d5b483");
static const QLatin1String mtuCharUuid("960d7e2a-a850-4a70-8064-cd74e9ccb6ff");
static const QLatin1String repeatedWriteServiceUuid("72b12a31-98ea-406d-a89d-2c932d11ff67");
static const QLatin1String repeatedWriteTargetCharUuid("2192ee43-6d17-4e78-b286-db2c3b696833");
static const QLatin1String repeatedWriteNotifyCharUuid("b3f9d1a2-3d55-49c9-8b29-e09cec77ff86");
static void establishNotifyOnWriteConnection(QLowEnergyService *svc)
{
// Make sure that the value from the repeatedWriteTargetCharUuid
// characteristic is writted to the repeatedWriteNotifyCharUuid
// characteristic
Q_ASSERT(svc->serviceUuid() == QBluetoothUuid(repeatedWriteServiceUuid));
QObject::connect(svc, &QLowEnergyService::characteristicChanged, svc,
[svc](const QLowEnergyCharacteristic &characteristic,
const QByteArray &newValue)
{
if (characteristic.uuid() == QBluetoothUuid(repeatedWriteTargetCharUuid)) {
auto notifyChar = svc->characteristic(QBluetoothUuid(repeatedWriteNotifyCharUuid));
svc->writeCharacteristic(notifyChar, newValue);
}
});
}
int main(int argc, char *argv[])
{
qDebug() << "build:" << __DATE__ << __TIME__;
QLoggingCategory::setFilterRules(QStringLiteral("qt.bluetooth* = true"));
#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
QGuiApplication app(argc, argv);
#else
QCoreApplication app(argc, argv);
#endif // Q_OS_ANDROID || Q_OS_IOS
// prepare list of services
QList<QLowEnergyServiceData> serviceDefinitions;
int connectioncount = 0;
{
// connection count service
QLowEnergyServiceData serviceData;
serviceData.setType(QLowEnergyServiceData::ServiceTypePrimary);
serviceData.setUuid(QBluetoothUuid(connectionCountServiceUuid));
QLowEnergyCharacteristicData charData;
charData.setUuid(QBluetoothUuid(connectionCountCharUuid));
size_t size = sizeof(int);
QByteArray initialValue(size, 0);
charData.setValue(initialValue);
charData.setValueLength(size, size);
charData.setProperties(QLowEnergyCharacteristic::PropertyType::Read);
serviceData.addCharacteristic(charData);
serviceDefinitions << serviceData;
}
{
// mtu size service
QLowEnergyServiceData serviceData;
serviceData.setType(QLowEnergyServiceData::ServiceTypePrimary);
serviceData.setUuid(QBluetoothUuid(mtuServiceUuid));
QLowEnergyCharacteristicData charData;
charData.setUuid(QBluetoothUuid(mtuCharUuid));
size_t size = sizeof(int);
int mtu = 23;
QByteArray initialValue((const char *)&mtu, sizeof(int));
charData.setValue(initialValue);
charData.setValueLength(size, size);
charData.setProperties(QLowEnergyCharacteristic::PropertyType::Read
| QLowEnergyCharacteristic::PropertyType::Notify);
serviceData.addCharacteristic(charData);
serviceDefinitions << serviceData;
}
{
// large attribute service
//
// This is a service offering a large characteristic and descriptor which can
// be read and written to
QLowEnergyServiceData serviceData;
serviceData.setType(QLowEnergyServiceData::ServiceTypePrimary);
serviceData.setUuid(QBluetoothUuid(largeAttributeServiceUuid));
QLowEnergyCharacteristicData charData;
charData.setUuid(QBluetoothUuid(largeAttributeCharUuid));
QByteArray initialValue(largeAttributeSize, 0);
initialValue[0] = 0x0b;
charData.setValue(initialValue);
charData.setValueLength(largeAttributeSize, largeAttributeSize);
charData.setProperties(QLowEnergyCharacteristic::PropertyType::Read
| QLowEnergyCharacteristic::PropertyType::Write);
QByteArray descInitialValue(largeAttributeSize, 0);
descInitialValue[0] = 0xdd;
QLowEnergyDescriptorData descData(
QBluetoothUuid{largeAttributeDescUuid},
descInitialValue
);
descData.setWritePermissions(true);
descData.setReadPermissions(true);
charData.addDescriptor(descData);
serviceData.addCharacteristic(charData);
serviceDefinitions << serviceData;
}
{
// notification service
//
// This is a service which offers:
// - one characteristic which does not support notification or indication
// - one characteristic which does only support notification
// - one characteristic which does only support indication
// - one characteristic which supports both notification or indication
// to test their discovery
QLowEnergyServiceData serviceData;
serviceData.setType(QLowEnergyServiceData::ServiceTypePrimary);
serviceData.setUuid(QBluetoothUuid(notificationIndicationTestServiceUuid));
{
QLowEnergyCharacteristicData charData;
charData.setUuid(QBluetoothUuid(notificationIndicationTestChar1Uuid));
QByteArray initialValue(8, 0);
initialValue[0] = 0x0b;
charData.setValue(initialValue);
charData.setValueLength(8, 8);
charData.setProperties(QLowEnergyCharacteristic::PropertyType::Read);
serviceData.addCharacteristic(charData);
}
{
QLowEnergyCharacteristicData charData;
charData.setUuid(QBluetoothUuid(notificationIndicationTestChar2Uuid));
QByteArray initialValue(8, 0);
initialValue[0] = 0x0b;
charData.setValue(initialValue);
charData.setValueLength(8, 8);
charData.setProperties(QLowEnergyCharacteristic::PropertyType::Read
| QLowEnergyCharacteristic::PropertyType::Notify);
const QLowEnergyDescriptorData clientConfig(
QBluetoothUuid::DescriptorType::ClientCharacteristicConfiguration,
QLowEnergyCharacteristic::CCCDDisable);
charData.addDescriptor(clientConfig);
serviceData.addCharacteristic(charData);
}
{
QLowEnergyCharacteristicData charData;
charData.setUuid(QBluetoothUuid(notificationIndicationTestChar3Uuid));
QByteArray initialValue(8, 0);
initialValue[0] = 0x0b;
charData.setValue(initialValue);
charData.setValueLength(8, 8);
charData.setProperties(QLowEnergyCharacteristic::PropertyType::Read
| QLowEnergyCharacteristic::PropertyType::Indicate);
const QLowEnergyDescriptorData clientConfig(
QBluetoothUuid::DescriptorType::ClientCharacteristicConfiguration,
QLowEnergyCharacteristic::CCCDDisable);
charData.addDescriptor(clientConfig);
serviceData.addCharacteristic(charData);
}
{
QLowEnergyCharacteristicData charData;
charData.setUuid(QBluetoothUuid(notificationIndicationTestChar4Uuid));
QByteArray initialValue(8, 0);
initialValue[0] = 0x0b;
charData.setValue(initialValue);
charData.setValueLength(8, 8);
charData.setProperties(QLowEnergyCharacteristic::PropertyType::Read
| QLowEnergyCharacteristic::PropertyType::Notify
| QLowEnergyCharacteristic::PropertyType::Indicate);
const QLowEnergyDescriptorData clientConfig(
QBluetoothUuid::DescriptorType::ClientCharacteristicConfiguration,
QLowEnergyCharacteristic::CCCDDisable);
charData.addDescriptor(clientConfig);
serviceData.addCharacteristic(charData);
}
serviceDefinitions << serviceData;
}
{
// server's platform identifier service
QLowEnergyServiceData serviceData;
serviceData.setType(QLowEnergyServiceData::ServiceTypePrimary);
serviceData.setUuid(QBluetoothUuid(platformIdentifierServiceUuid));
QLowEnergyCharacteristicData charData;
charData.setUuid(QBluetoothUuid(platformIdentifierCharUuid));
#if defined(Q_OS_ANDROID)
QByteArray platformIdentifier("android");
#elif defined(QT_OS_WIN)
QByteArray platformIdentifier("windows");
#elif defined(Q_OS_DARWIN)
QByteArray platformIdentifier("darwin");
#elif defined(Q_OS_LINUX)
QByteArray platformIdentifier("linux");
#else
QByteArray platformIdentifier("unspecified");
#endif
qDebug() << "Server will report it is running on: " << platformIdentifier;
charData.setValue(platformIdentifier);
charData.setProperties(QLowEnergyCharacteristic::PropertyType::Read);
serviceData.addCharacteristic(charData);
serviceDefinitions << serviceData;
}
{
// repeated characteristic write service
//
// This service offers an 8 bytes large characteristic which can
// be read and written. Once the value is updated, it writes the
// same value to the other characteristic, which notifies the client
// about its change. This way we can make sure that all write were
// successful and happened in the right order.
// We can't use one characteristics for writing and notification,
// because on most backends when the characteristics was written
// by the client, there will be no notification about it.
QLowEnergyServiceData serviceData;
serviceData.setType(QLowEnergyServiceData::ServiceTypePrimary);
serviceData.setUuid(QBluetoothUuid(repeatedWriteServiceUuid));
{
// The characteristics to be written by the client.
QLowEnergyCharacteristicData charData;
charData.setUuid(QBluetoothUuid(repeatedWriteTargetCharUuid));
QByteArray initialValue(8, 0);
charData.setValue(initialValue);
charData.setValueLength(8, 8);
charData.setProperties(QLowEnergyCharacteristic::PropertyType::Read
| QLowEnergyCharacteristic::PropertyType::Write);
serviceData.addCharacteristic(charData);
}
{
// The characteristics written by the server,
// it will send notifications to the client.
QLowEnergyCharacteristicData charData;
charData.setUuid(QBluetoothUuid(repeatedWriteNotifyCharUuid));
QByteArray initialValue(8, 0);
charData.setValue(initialValue);
charData.setValueLength(8, 8);
charData.setProperties(QLowEnergyCharacteristic::PropertyType::Read
| QLowEnergyCharacteristic::PropertyType::Write
| QLowEnergyCharacteristic::PropertyType::Notify);
const QLowEnergyDescriptorData clientConfig(
QBluetoothUuid::DescriptorType::ClientCharacteristicConfiguration,
QLowEnergyCharacteristic::CCCDDisable);
charData.addDescriptor(clientConfig);
serviceData.addCharacteristic(charData);
}
serviceDefinitions << serviceData;
}
#ifndef Q_OS_IOS
auto localAdapters = QBluetoothLocalDevice::allDevices();
if (localAdapters.isEmpty()) {
qWarning() << "Bluetoothtestdevice did not find a local adapter";
return EXIT_FAILURE;
}
QBluetoothLocalDevice adapter(localAdapters.back().address());
adapter.setHostMode(QBluetoothLocalDevice::HostDiscoverable);
#endif // Q_OS_IOS
// Advertising data
QLowEnergyAdvertisingData advertisingData;
advertisingData.setDiscoverability(QLowEnergyAdvertisingData::DiscoverabilityGeneral);
advertisingData.setIncludePowerLevel(true);
advertisingData.setLocalName("BluetoothTestDevice");
QList<QBluetoothUuid> serviceUuids;
for (const auto &serviceData : serviceDefinitions) {
serviceUuids << serviceData.uuid();
}
// leads to too large advertising data
// advertisingData.setServices(serviceUuids);
// start advertising
#ifndef Q_OS_IOS
auto devices = QBluetoothLocalDevice::allDevices();
qDebug() << "advertising on" << devices.back().address();
const QScopedPointer<QLowEnergyController> leController(
QLowEnergyController::createPeripheral(devices.back().address()));
#else
const QScopedPointer<QLowEnergyController> leController(
QLowEnergyController::createPeripheral());
#endif // Q_OS_IOS
QObject::connect(leController.data(), &QLowEnergyController::errorOccurred,
[](QLowEnergyController::Error error) {
qDebug() << "Bluetoothtestdevice QLowEnergyController errorOccurred:" << error;
});
QObject::connect(leController.data(), &QLowEnergyController::stateChanged,
[](QLowEnergyController::ControllerState state) {
qDebug() << "Bluetoothtestdevice QLowEnergyController stateChanged:" << state;
});
QList<QSharedPointer<QLowEnergyService>> services;
for (const auto &serviceData : serviceDefinitions) {
services.emplaceBack(leController->addService(serviceData));
}
establishNotifyOnWriteConnection(services[5].get());
leController->startAdvertising(QLowEnergyAdvertisingParameters(), advertisingData,
advertisingData);
auto reconnect = [&connectioncount, &leController, advertisingData, &services, serviceDefinitions]() {
connectioncount++;
for (qsizetype i = 0; i < services.size(); ++i) {
services[i].reset(leController->addService(serviceDefinitions[i]));
}
establishNotifyOnWriteConnection(services[5].get());
{
// set connection counter
Q_ASSERT(services[0]->serviceUuid()
== QBluetoothUuid(connectionCountServiceUuid));
QByteArray value((const char *)&connectioncount, sizeof(int));
QLowEnergyCharacteristic characteristic = services[0]->characteristic(
QBluetoothUuid(connectionCountCharUuid));
Q_ASSERT(characteristic.isValid());
services[0]->writeCharacteristic(characteristic, value);
}
bool allValid = true;
for (const auto &service : services) {
allValid = allValid & !service.isNull();
}
if (allValid){
leController->startAdvertising(QLowEnergyAdvertisingParameters(), advertisingData,
advertisingData);
qDebug() << "starting advertising for " << connectioncount << "th time.";
}
else
qDebug() << "Cannot start advertising: Service not valid.";
};
QObject::connect(leController.data(), &QLowEnergyController::disconnected, reconnect);
QObject::connect(leController.data(), &QLowEnergyController::mtuChanged, [&services](int mtu) {
qDebug() << "MTU changed, callback called.";
Q_ASSERT(services[1]->serviceUuid() == QBluetoothUuid(mtuServiceUuid));
QByteArray value((const char *)&mtu, sizeof(int));
QLowEnergyCharacteristic characteristic =
services[1]->characteristic(QBluetoothUuid(mtuCharUuid));
Q_ASSERT(characteristic.isValid());
services[1]->writeCharacteristic(characteristic, value);
});
QTimer notificationTestTimer;
quint64 currentCharacteristicValue = 0;
const auto characteristicChanger = [&services, &currentCharacteristicValue]() {
QByteArray value((const char *)&currentCharacteristicValue, 8);
Q_ASSERT(services[3]->serviceUuid()
== QBluetoothUuid(notificationIndicationTestServiceUuid));
{
QLowEnergyCharacteristic characteristic = services[3]->characteristic(
QBluetoothUuid(notificationIndicationTestChar2Uuid));
Q_ASSERT(characteristic.isValid());
services[3]->writeCharacteristic(characteristic,
value); // Potentially causes notification.
}
{
QLowEnergyCharacteristic characteristic = services[3]->characteristic(
QBluetoothUuid(notificationIndicationTestChar3Uuid));
Q_ASSERT(characteristic.isValid());
services[3]->writeCharacteristic(characteristic,
value); // Potentially causes notification.
}
{
QLowEnergyCharacteristic characteristic = services[3]->characteristic(
QBluetoothUuid(notificationIndicationTestChar4Uuid));
Q_ASSERT(characteristic.isValid());
services[3]->writeCharacteristic(characteristic,
value); // Potentially causes notification.
}
++currentCharacteristicValue;
};
QObject::connect(&notificationTestTimer, &QTimer::timeout, characteristicChanger);
notificationTestTimer.start(100);
return app.exec();
}
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