QBluetoothLocalDevice Class

Member Function Documentation

[explicit] QBluetoothLocalDevice::QBluetoothLocalDevice(QObject *parent = nullptr)

Constructs a QBluetoothLocalDevice with parent.

See also isValid().

[explicit] QBluetoothLocalDevice::QBluetoothLocalDevice(const QBluetoothAddress &address, QObject *parent = 0)

Construct new QBluetoothLocalDevice for address. If address is default constructed the resulting local device selects the local default device.

See also isValid().

[virtual noexcept] QBluetoothLocalDevice::~QBluetoothLocalDevice()

Destroys the QBluetoothLocalDevice.

QBluetoothAddress QBluetoothLocalDevice::address() const

Returns the MAC address of this Bluetooth device.

[static] QList<QBluetoothHostInfo> QBluetoothLocalDevice::allDevices()

Returns a list of all available local Bluetooth devices. On macOS, there is only the "default" local device.

QList<QBluetoothAddress> QBluetoothLocalDevice::connectedDevices() const

Returns the list of connected devices. This list is different from the list of currently paired devices.

On Android and macOS, it is not possible to retrieve a list of connected devices. It is only possible to listen to (dis)connect changes. For convenience, this class monitors all connect and disconnect events since its instanciation and returns the current list when calling this function. Therefore it is possible that this function returns an empty list shortly after creating an instance.

See also deviceConnected() and deviceDisconnected().

[signal] void QBluetoothLocalDevice::deviceConnected(const QBluetoothAddress &address)

This signal is emitted when the local device establishes a connection to a remote device with address.

See also deviceDisconnected() and connectedDevices().

[signal] void QBluetoothLocalDevice::deviceDisconnected(const QBluetoothAddress &address)

This signal is emitted when the local device disconnects from a remote Bluetooth device with address.

See also deviceConnected() and connectedDevices().

[signal, since 6.2] void QBluetoothLocalDevice::errorOccurred(QBluetoothLocalDevice::Error error)

Signal emitted if there's an exceptional error while pairing.

This function was introduced in Qt 6.2.

QBluetoothLocalDevice::HostMode QBluetoothLocalDevice::hostMode() const

Returns the current host mode of this local Bluetooth device. On macOS, it is either HostPoweredOff or HostConnectable.

See also setHostMode().

[signal] void QBluetoothLocalDevice::hostModeStateChanged(QBluetoothLocalDevice::HostMode state)

The state of the host has transitioned to a different HostMode.

bool QBluetoothLocalDevice::isValid() const

Returns true if the QBluetoothLocalDevice represents an available local Bluetooth device; otherwise return false.

If the local Bluetooth adapter represented by an instance of this class is removed from the system (e.g. removal of the underlying Bluetooth dongle) then this instance will become invalid. An already invalid QBluetoothLocalDevice instance remains invalid even if the same Bluetooth adapter is returned to the system.

See also allDevices().

QString QBluetoothLocalDevice::name() const

Returns the name assgined by the user to this Bluetooth device.

[signal] void QBluetoothLocalDevice::pairingFinished(const QBluetoothAddress &address, QBluetoothLocalDevice::Pairing pairing)

Pairing or unpairing has completed with address. Current pairing status is in pairing. If the pairing request was not successful, this signal will not be emitted. The errorOccurred() signal is emitted if the pairing request failed. The signal is only ever emitted for pairing requests which have previously requested by calling requestPairing() of the current object instance.

QBluetoothLocalDevice::Pairing QBluetoothLocalDevice::pairingStatus(const QBluetoothAddress &address) const

Returns the current bluetooth pairing status of address, if it's unpaired, paired, or paired and authorized.

void QBluetoothLocalDevice::powerOn()

Powers on the device after returning it to the hostMode() state, if it was powered off.

void QBluetoothLocalDevice::requestPairing(const QBluetoothAddress &address, QBluetoothLocalDevice::Pairing pairing)

Set the pairing status with address. The results are returned by the signal, pairingFinished().

On Android and macOS, AuthorizedPaired is not possible and will have the same behavior as Paired. On Windows the exact pairing mode decision is up to the operating system.

On macOS, it is not possible to unpair a device. If Unpaired is requested, pairingFinished() is immediately emitted although the device remains paired. It is possible to request the pairing for a previously unpaired device. In addition AuthorizedPaired has the same behavior as Paired.

Caution: creating a pairing may take minutes, and may require the user to acknowledge.

void QBluetoothLocalDevice::setHostMode(QBluetoothLocalDevice::HostMode mode)

Sets the host mode of this local Bluetooth device to mode.

Some transitions such as turning the device on or off may take some time. Therefore subsequent calls should only be made once the hostModeStateChanged() signal has concluded the previous request. If this is ignored the result of such a series of calls is not well defined.

See also hostMode().