The DataLoggerServicePrivate class provides private implementation for DataLoggerService. More...

Inheritance diagram for DataLoggerServicePrivate:

Collaboration diagram for DataLoggerServicePrivate:

Public Member Functions
	DataLoggerServicePrivate (QLowEnergyController controller, DataLoggerService const q)

Public Member Functions inherited from AbstractPokitServicePrivate
	AbstractPokitServicePrivate (const QBluetoothUuid &serviceUuid, QLowEnergyController controller, AbstractPokitService const q)

bool	createServiceObject ()
	Creates an internal service object from the internal controller.

QLowEnergyCharacteristic	getCharacteristic (const QBluetoothUuid &uuid) const
	Get uuid characteristc from the underlying service.

bool	readCharacteristic (const QBluetoothUuid &uuid)
	Read the uuid characteristic.

bool	enableCharacteristicNotificatons (const QBluetoothUuid &uuid)
	Enables client (Pokit device) side notification for characteristic uuid.

bool	disableCharacteristicNotificatons (const QBluetoothUuid &uuid)
	Disables client (Pokit device) side notification for characteristic uuid.

Public Member Functions inherited from QObject
virtual const QMetaObject *	metaObject () const const

	QObject (QObject *parent)

virtual bool	event (QEvent *e)

virtual bool	eventFilter (QObject watched, QEvent event)

QString	objectName () const const

void	setObjectName (const QString &name)

bool	isWidgetType () const const

bool	isWindowType () const const

bool	signalsBlocked () const const

bool	blockSignals (bool block)

QThread *	thread () const const

void	moveToThread (QThread *targetThread)

int	startTimer (int interval, Qt::TimerType timerType)

int	startTimer (std::chrono::milliseconds time, Qt::TimerType timerType)

void	killTimer (int id)

T	findChild (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QRegExp &regExp, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const

const QObjectList &	children () const const

void	setParent (QObject *parent)

void	installEventFilter (QObject *filterObj)

void	removeEventFilter (QObject *obj)

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *method, Qt::ConnectionType type) const const

bool	disconnect (const char signal, const QObject receiver, const char *method) const const

bool	disconnect (const QObject receiver, const char method) const const

void	dumpObjectTree ()

void	dumpObjectInfo ()

void	dumpObjectTree () const const

void	dumpObjectInfo () const const

bool	setProperty (const char *name, const QVariant &value)

QVariant	property (const char *name) const const

QList< QByteArray >	dynamicPropertyNames () const const

void	destroyed (QObject *obj)

void	objectNameChanged (const QString &objectName)

QObject *	parent () const const

bool	inherits (const char *className) const const

void	deleteLater ()

	Q_DISABLE_COPY (Class)

	Q_DISABLE_MOVE (Class)

	Q_DISABLE_COPY_MOVE (Class)

T	qobject_cast (QObject *object)

T	qobject_cast (const QObject *object)

T	qFindChild (const QObject *obj, const QString &name)

QList< T >	qFindChildren (const QObject *obj, const QString &name)

QList< T >	qFindChildren (const QObject *obj, const QRegExp &regExp)

	Q_CLASSINFO (Name, Value)

	Q_INTERFACES (...)

	Q_PROPERTY (...)

	Q_ENUMS (...)

	Q_FLAGS (...)

	Q_ENUM (...)

	Q_FLAG (...)

	Q_ENUM_NS (...)

	Q_FLAG_NS (...)

	Q_OBJECT Q_OBJECT

	Q_GADGET Q_GADGET

	Q_NAMESPACE Q_NAMESPACE

	Q_NAMESPACE_EXPORT (EXPORT_MACRO)

	Q_SIGNALS Q_SIGNALS

	Q_SIGNAL Q_SIGNAL

	Q_SLOTS Q_SLOTS

	Q_SLOT Q_SLOT

	Q_EMIT Q_EMIT

	Q_INVOKABLE Q_INVOKABLE

	Q_REVISION Q_REVISION

	Q_SET_OBJECT_NAME (Object)

	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT

Static Public Member Functions
static QByteArray	encodeSettings (const DataLoggerService::Settings &settings, const bool updateIntervalIs32bit)
	Returns settings in the format Pokit devices expect.

static DataLoggerService::Metadata	parseMetadata (const QByteArray &value)
	Parses the `Metadata` value into a DataLoggerService::Metatdata struct.

static DataLoggerService::Samples	parseSamples (const QByteArray &value)
	Parses the `Reading` value into a DataLoggerService::Samples vector.

Static Public Member Functions inherited from AbstractPokitServicePrivate
static	Q_LOGGING_CATEGORY (lc, "pokit.ble.service", QtInfoMsg)
	Logging category.

static bool	checkSize (const QString &label, const QByteArray &data, const int minSize, const int maxSize=-1, const bool failOnMax=false)
	Returns `false` if data is smaller than minSize, otherwise returns failOnMax if data is bigger than maxSize, otherwise returns `true`.

static QString	toHexString (const QByteArray &data, const int maxSize=20)
	Returns up to maxSize bytes of data as a human readable hexadecimal string.

Static Public Member Functions inherited from QObject
QString	tr (const char sourceText, const char disambiguation, int n)

QString	trUtf8 (const char sourceText, const char disambiguation, int n)

QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject context, Functor functor, Qt::ConnectionType type)

bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char method)

bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method)

bool	disconnect (const QMetaObject::Connection &connection)

bool	disconnect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method)

Protected Member Functions
void	characteristicRead (const QLowEnergyCharacteristic &characteristic, const QByteArray &value) override
	Implements AbstractPokitServicePrivate::characteristicRead to parse value, then emit a specialised signal, for each supported characteristic.

void	characteristicWritten (const QLowEnergyCharacteristic &characteristic, const QByteArray &newValue) override
	Implements AbstractPokitServicePrivate::characteristicWritten to parse newValue, then emit a specialised signal, for each supported characteristic.

void	characteristicChanged (const QLowEnergyCharacteristic &characteristic, const QByteArray &newValue) override
	Implements AbstractPokitServicePrivate::characteristicChanged to parse newValue, then emit a specialised signal, for each supported characteristic.

Protected Member Functions inherited from QObject
QObject *	sender () const const

int	senderSignalIndex () const const

int	receivers (const char *signal) const const

bool	isSignalConnected (const QMetaMethod &signal) const const

virtual void	timerEvent (QTimerEvent *event)

virtual void	childEvent (QChildEvent *event)

virtual void	customEvent (QEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	disconnectNotify (const QMetaMethod &signal)

Friends
class	TestDataLoggerService

Additional Inherited Members
Public Attributes inherited from AbstractPokitServicePrivate
bool	autoDiscover { true }
	Whether autodiscovery is enabled or not.

QLowEnergyController *	controller { nullptr }
	BLE controller to fetch the service from.

std::optional< PokitProduct >	pokitProduct
	The Pokit product controller is connected to.

QLowEnergyService *	service { nullptr }
	BLE service to read/write characteristics.

QBluetoothUuid	serviceUuid
	UUIDs for service.

Public Attributes inherited from QObject
typedef	QObjectList

Protected Slots inherited from AbstractPokitServicePrivate
void	connected ()
	Handles `QLowEnergyController::connected` events.

void	discoveryFinished ()
	Handles `QLowEnergyController::discoveryFinished` events.

void	errorOccurred (const QLowEnergyService::ServiceError newError)
	Handles `QLowEnergyController::errorOccurred` events.

virtual void	serviceDiscovered (const QBluetoothUuid &newService)
	Handles `QLowEnergyController::serviceDiscovered` events.

void	stateChanged (QLowEnergyService::ServiceState newState)
	Handles `QLowEnergyController::stateChanged` events.

Protected Attributes inherited from AbstractPokitServicePrivate
AbstractPokitService *	q_ptr
	Internal q-pointer.

Properties inherited from QObject
	objectName

Detailed Description

The DataLoggerServicePrivate class provides private implementation for DataLoggerService.

Definition at line 18 of file dataloggerservice_p.h.

Constructor & Destructor Documentation

◆ DataLoggerServicePrivate()

DataLoggerServicePrivate::DataLoggerServicePrivate	(	QLowEnergyController *	controller,
		DataLoggerService *const	q )

explicit

Constructs a new DataLoggerServicePrivate object with public implementation q.

Definition at line 339 of file dataloggerservice.cpp.

    : AbstractPokitServicePrivate(DataLoggerService::serviceUuid, controller, q)
{
 
}

Member Function Documentation

◆ characteristicChanged()

void DataLoggerServicePrivate::characteristicChanged	(	const QLowEnergyCharacteristic &	characteristic,
		const QByteArray &	newValue )

overrideprotectedvirtual

Implements AbstractPokitServicePrivate::characteristicChanged to parse newValue, then emit a specialised signal, for each supported characteristic.

Reimplemented from AbstractPokitServicePrivate.

Definition at line 509 of file dataloggerservice.cpp.

{
    AbstractPokitServicePrivate::characteristicChanged(characteristic, newValue);
 
    Q_Q(DataLoggerService);
    if (characteristic.uuid() == DataLoggerService::CharacteristicUuids::settings) {
        qCWarning(lc).noquote() << tr("Settings characteristic is write-only, but somehow updated")
            << serviceUuid << characteristic.name() << characteristic.uuid();
        return;
    }
 
    if (characteristic.uuid() == DataLoggerService::CharacteristicUuids::metadata) {
        Q_EMIT q->metadataRead(parseMetadata(newValue));
        return;
    }
 
    if (characteristic.uuid() == DataLoggerService::CharacteristicUuids::reading) {
        Q_EMIT q->samplesRead(parseSamples(newValue));
        return;
    }
 
    qCWarning(lc).noquote() << tr("Unknown characteristic notified for Data Logger service")
        << serviceUuid << characteristic.name() << characteristic.uuid();
}

References AbstractPokitServicePrivate::characteristicChanged(), DataLoggerService::CharacteristicUuids::metadata, QLowEnergyCharacteristic::name(), parseMetadata(), parseSamples(), QObject::Q_EMIT(), DataLoggerService::CharacteristicUuids::reading, AbstractPokitServicePrivate::serviceUuid, DataLoggerService::CharacteristicUuids::settings, QObject::tr(), and QLowEnergyCharacteristic::uuid().

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◆ characteristicRead()

void DataLoggerServicePrivate::characteristicRead	(	const QLowEnergyCharacteristic &	characteristic,
		const QByteArray &	value )

overrideprotectedvirtual

Implements AbstractPokitServicePrivate::characteristicRead to parse value, then emit a specialised signal, for each supported characteristic.

Reimplemented from AbstractPokitServicePrivate.

Definition at line 447 of file dataloggerservice.cpp.

{
    AbstractPokitServicePrivate::characteristicRead(characteristic, value);
 
    if (characteristic.uuid() == DataLoggerService::CharacteristicUuids::settings) {
        qCWarning(lc).noquote() << tr("Settings characteristic is write-only, but somehow read")
            << serviceUuid << characteristic.name() << characteristic.uuid();
        return;
    }
 
    Q_Q(DataLoggerService);
    if (characteristic.uuid() == DataLoggerService::CharacteristicUuids::metadata) {
        Q_EMIT q->metadataRead(parseMetadata(value));
        return;
    }
 
    if (characteristic.uuid() == DataLoggerService::CharacteristicUuids::reading) {
        qCWarning(lc).noquote() << tr("Reading characteristic is notify-only")
            << serviceUuid << characteristic.name() << characteristic.uuid();
        return;
    }
 
    qCWarning(lc).noquote() << tr("Unknown characteristic read for Data Logger service")
        << serviceUuid << characteristic.name() << characteristic.uuid();
}

References AbstractPokitServicePrivate::characteristicRead(), DataLoggerService::CharacteristicUuids::metadata, QLowEnergyCharacteristic::name(), parseMetadata(), QObject::Q_EMIT(), DataLoggerService::CharacteristicUuids::reading, AbstractPokitServicePrivate::serviceUuid, DataLoggerService::CharacteristicUuids::settings, QObject::tr(), and QLowEnergyCharacteristic::uuid().

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◆ characteristicWritten()

void DataLoggerServicePrivate::characteristicWritten	(	const QLowEnergyCharacteristic &	characteristic,
		const QByteArray &	newValue )

overrideprotectedvirtual

Implements AbstractPokitServicePrivate::characteristicWritten to parse newValue, then emit a specialised signal, for each supported characteristic.

Reimplemented from AbstractPokitServicePrivate.

Definition at line 478 of file dataloggerservice.cpp.

{
    AbstractPokitServicePrivate::characteristicWritten(characteristic, newValue);
 
    Q_Q(DataLoggerService);
    if (characteristic.uuid() == DataLoggerService::CharacteristicUuids::settings) {
        Q_EMIT q->settingsWritten();
        return;
    }
 
    if (characteristic.uuid() == DataLoggerService::CharacteristicUuids::metadata) {
        qCWarning(lc).noquote() << tr("Metadata characteristic is read/notify, but somehow written")
            << serviceUuid << characteristic.name() << characteristic.uuid();
        return;
    }
 
    if (characteristic.uuid() == DataLoggerService::CharacteristicUuids::reading) {
        qCWarning(lc).noquote() << tr("Reading characteristic is notify-only, but somehow written")
            << serviceUuid << characteristic.name() << characteristic.uuid();
        return;
    }
 
    qCWarning(lc).noquote() << tr("Unknown characteristic written for Data Logger service")
        << serviceUuid << characteristic.name() << characteristic.uuid();
}

References AbstractPokitServicePrivate::characteristicWritten(), DataLoggerService::CharacteristicUuids::metadata, QLowEnergyCharacteristic::name(), QObject::Q_EMIT(), DataLoggerService::CharacteristicUuids::reading, AbstractPokitServicePrivate::serviceUuid, DataLoggerService::CharacteristicUuids::settings, QObject::tr(), and QLowEnergyCharacteristic::uuid().

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◆ encodeSettings()

QByteArray DataLoggerServicePrivate::encodeSettings	(	const DataLoggerService::Settings &	settings,
		const bool	updateIntervalIs32bit )

static

Returns settings in the format Pokit devices expect.

If updateIntervalIs32bit is true then the Update Interval field will be encoded in 32-bit instead of 16.

Pokit Bluetooth API errata: For Pokit Meter, updateInterval is uint16 seconds (as per the Pokit API 1.00), however for Pokit Pro it's uint32 milliseconds, even though that's not officially documented anywhere.

Definition at line 350 of file dataloggerservice.cpp.

{
    static_assert(sizeof(settings.command)        == 1, "Expected to be 1 byte.");
    static_assert(sizeof(settings.arguments)      == 2, "Expected to be 2 bytes.");
    static_assert(sizeof(settings.mode)           == 1, "Expected to be 1 byte.");
    static_assert(sizeof(settings.range)          == 1, "Expected to be 1 byte.");
    static_assert(sizeof(settings.updateInterval) == 4, "Expected to be 4 bytes.");
    static_assert(sizeof(settings.timestamp)      == 4, "Expected to be 4 bytes.");
 
    QByteArray value;
    QDataStream stream(&value, QIODevice::WriteOnly);
    stream.setByteOrder(QDataStream::LittleEndian);
    stream.setFloatingPointPrecision(QDataStream::SinglePrecision); // 32-bit floats, not 64-bit.
    stream << (quint8)settings.command << settings.arguments << (quint8)settings.mode << settings.range;
 
    /*!
     * \pokitApi For Pokit Meter, `updateInterval` is `uint16` seconds (as per the Pokit API 1.00),
     * however for Pokit Pro it's `uint32` milliseconds, even though that's not officially
     * documented anywhere.
     */
 
    if (!updateIntervalIs32bit) {
        stream << (quint16)((settings.updateInterval+500)/1000) << settings.timestamp;
        Q_ASSERT(value.size() == 11); // According to Pokit API 1.00.
    } else {
        stream << settings.updateInterval << settings.timestamp;
        Q_ASSERT(value.size() == 13); // According to testing / experimentation.
    }
    return value;
}

References DataLoggerService::Settings::arguments, DataLoggerService::Settings::command, QDataStream::LittleEndian, DataLoggerService::Settings::mode, DataLoggerService::Settings::range, QDataStream::setByteOrder(), QDataStream::setFloatingPointPrecision(), QDataStream::SinglePrecision, QByteArray::size(), DataLoggerService::Settings::timestamp, DataLoggerService::Settings::updateInterval, and QIODevice::WriteOnly.

Referenced by DataLoggerService::setSettings().

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◆ parseMetadata()

DataLoggerService::Metadata DataLoggerServicePrivate::parseMetadata ( const QByteArray & value )

static

Parses the Metadata value into a DataLoggerService::Metatdata struct.

Pokit Bluetooth API errata: For Pokit Meter, updateInterval is uint16 (as per the Pokit API 1.00), however for Pokit Pro it's uint32, even though that's not officially documented anywhere. Also note, the doc claims 'microseconds' (ie 10^-6), but clearly the value is 'milliseconds' (ie 10^-3) for Pokit Pro, and whole seconds for Pokit Meter.

Definition at line 385 of file dataloggerservice.cpp.

{
    DataLoggerService::Metadata metadata{
        DataLoggerService::LoggerStatus::Error, std::numeric_limits<float>::quiet_NaN(),
        DataLoggerService::Mode::Idle, 0, 0, 0, 0
    };
 
    // Pokit Meter: 15 bytes, Pokit Pro: 23 bytes.
    if (!checkSize(QLatin1String("Metadata"), value, 15, 23)) {
        return metadata;
    }
 
    qCDebug(lc) << value.mid(7,12).toHex(',');
    metadata.status = static_cast<DataLoggerService::LoggerStatus>(value.at(0));
    metadata.scale  = qFromLittleEndian<float>(value.mid(1,4).constData());
    metadata.mode   = static_cast<DataLoggerService::Mode>(value.at(5));
    metadata.range  = static_cast<quint8>(value.at(6));
 
    /*!
     * \pokitApi For Pokit Meter, `updateInterval` is `uint16` (as per the Pokit API 1.00), however
     * for Pokit Pro it's `uint32`, even though that's not officially documented anywhere.
     * Also note, the doc claims 'microseconds' (ie 10^-6), but clearly the value is 'milliseconds'
     * (ie 10^-3) for Pokit Pro, and whole seconds for Pokit Meter.
     */
 
    if (value.size() == 15) {
        metadata.updateInterval  = qFromLittleEndian<quint16>(value.mid(7,2).constData())*1000;
        metadata.numberOfSamples = qFromLittleEndian<quint16>(value.mid(9,2).constData());
        metadata.timestamp       = qFromLittleEndian<quint32>(value.mid(11,4).constData());
    } else if (value.size() == 23) {
        metadata.updateInterval  = qFromLittleEndian<quint32>(value.mid(7,4).constData());
        metadata.numberOfSamples = qFromLittleEndian<quint16>(value.mid(11,2).constData());
        metadata.timestamp       = qFromLittleEndian<quint32>(value.mid(19,4).constData());
    } else {
        qCWarning(lc).noquote() << tr("Cannot decode metadata of %n byte/s: %1", nullptr, value.size())
            .arg(toHexString(value));
    }
    return metadata;
}

References QString::arg(), QByteArray::at(), AbstractPokitServicePrivate::checkSize(), QByteArray::constData(), DataLoggerService::Error, DataLoggerService::Idle, QByteArray::mid(), QByteArray::size(), QByteArray::toHex(), AbstractPokitServicePrivate::toHexString(), and QObject::tr().

Referenced by characteristicChanged(), characteristicRead(), and DataLoggerService::metadata().

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◆ parseSamples()

DataLoggerService::Samples DataLoggerServicePrivate::parseSamples ( const QByteArray & value )

static

Parses the Reading value into a DataLoggerService::Samples vector.

Definition at line 428 of file dataloggerservice.cpp.

{
    DataLoggerService::Samples samples;
    if ((value.size()%2) != 0) {
        qCWarning(lc).noquote() << tr("Samples value has odd size %1 (should be even): %2")
            .arg(value.size()).arg(toHexString(value));
        return samples;
    }
    while ((samples.size()*2) < value.size()) {
        samples.append(qFromLittleEndian<qint16>(value.mid(samples.size()*2,2).constData()));
    }
    qCDebug(lc).noquote() << tr("Read %n sample/s from %1-bytes.", nullptr, samples.size()).arg(value.size());
    return samples;
}

References QVector::append(), QString::arg(), QByteArray::constData(), QByteArray::mid(), QByteArray::size(), QVector::size(), AbstractPokitServicePrivate::toHexString(), and QObject::tr().

Referenced by characteristicChanged().

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Friends And Related Symbol Documentation

◆ TestDataLoggerService

friend class TestDataLoggerService

friend

Definition at line 42 of file dataloggerservice_p.h.

The documentation for this class was generated from the following files:

Public Member Functions

Static Public Member Functions

Protected Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ DataLoggerServicePrivate()

Member Function Documentation

◆ characteristicChanged()

◆ characteristicRead()

◆ characteristicWritten()

◆ encodeSettings()

◆ parseMetadata()

◆ parseSamples()

Friends And Related Symbol Documentation

◆ TestDataLoggerService