class QBluetoothLocalDevice¶

The QBluetoothLocalDevice class enables access to the local Bluetooth device. More…

Synopsis¶

Methods¶

def __init__()
def address()
def connectedDevices()
def hostMode()
def isValid()
def name()
def pairingStatus()
def powerOn()
def requestPairing()
def setHostMode()

Static functions¶

def allDevices()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description¶

QBluetoothLocalDevice provides functions for getting and setting the state of local Bluetooth devices.

On iOS, this class cannot be used because the platform does not expose any data or API which may provide information on the local Bluetooth device.

class Pairing¶

This enum describes the pairing state between the two Bluetooth devices.

Constant

Description

QBluetoothLocalDevice.Unpaired

The Bluetooth devices are not paired.

QBluetoothLocalDevice.Paired

The Bluetooth devices are paired. The system will prompt the user for authorization when the remote device initiates a connection to the local device.

QBluetoothLocalDevice.AuthorizedPaired

The Bluetooth devices are paired. The system will not prompt the user for authorization when the remote device initiates a connection to the local device.

Constant	Description
QBluetoothLocalDevice.Unpaired	The Bluetooth devices are not paired.
QBluetoothLocalDevice.Paired	The Bluetooth devices are paired. The system will prompt the user for authorization when the remote device initiates a connection to the local device.
QBluetoothLocalDevice.AuthorizedPaired	The Bluetooth devices are paired. The system will not prompt the user for authorization when the remote device initiates a connection to the local device.

class HostMode¶

This enum describes the most of the local Bluetooth device.

Constant

Description

QBluetoothLocalDevice.HostPoweredOff

Power off the device

QBluetoothLocalDevice.HostConnectable

Remote Bluetooth devices can connect to the local Bluetooth device if they have previously been paired with it or otherwise know its address. This powers up the device if it was powered off.

QBluetoothLocalDevice.HostDiscoverable

Remote Bluetooth devices can discover the presence of the local Bluetooth device. The device will also be connectable, and powered on. On Android, this mode can only be active for a maximum of 5 minutes.

QBluetoothLocalDevice.HostDiscoverableLimitedInquiry

Remote Bluetooth devices can discover the presence of the local Bluetooth device when performing a limited inquiry. This should be used for locating services that are only made discoverable for a limited period of time. This can speed up discovery between gaming devices, as service discovery can be skipped on devices not in LimitedInquiry mode. In this mode, the device will be connectable and powered on, if required. This mode is is not supported on Android.

Constant	Description
QBluetoothLocalDevice.HostPoweredOff	Power off the device
QBluetoothLocalDevice.HostConnectable	Remote Bluetooth devices can connect to the local Bluetooth device if they have previously been paired with it or otherwise know its address. This powers up the device if it was powered off.
QBluetoothLocalDevice.HostDiscoverable	Remote Bluetooth devices can discover the presence of the local Bluetooth device. The device will also be connectable, and powered on. On Android, this mode can only be active for a maximum of 5 minutes.
QBluetoothLocalDevice.HostDiscoverableLimitedInquiry	Remote Bluetooth devices can discover the presence of the local Bluetooth device when performing a limited inquiry. This should be used for locating services that are only made discoverable for a limited period of time. This can speed up discovery between gaming devices, as service discovery can be skipped on devices not in LimitedInquiry mode. In this mode, the device will be connectable and powered on, if required. This mode is is not supported on Android.

Note

On macOS, it is not possible to set the hostMode() . The reported host modes are limited to HostPoweredOff and HostConnectable.

Note

On Windows, it is not possible to set the hostMode() to HostDiscoverable or HostDiscoverableLimitedInquiry. Using these modes is equivalent to HostConnectable.

Note

Starting from Android 13 (API level 33) the HostPoweredOff state relies on non-public Android API as the public one has been deprecated, see ( disable() ). This may change in a future version of Android.

Note

At least on Android 12 the device’s Bluetooth visibility setting may dictate the result of setting either HostDiscoverable or HostConnectable. For example if the visibility is set off, it may not be possible to enter the HostDiscoverable mode, but HostConnectable will be used instead. This may change in future version of Android.

class Error¶

This enum describes errors that maybe returned

Constant

Description

QBluetoothLocalDevice.NoError

No known error

QBluetoothLocalDevice.PairingError

Error in pairing

QBluetoothLocalDevice.MissingPermissionsError

The operating system requests permissions which were not granted by the user.

QBluetoothLocalDevice.UnknownError

Unknown error

Constant	Description
QBluetoothLocalDevice.NoError	No known error
QBluetoothLocalDevice.PairingError	Error in pairing
QBluetoothLocalDevice.MissingPermissionsError	The operating system requests permissions which were not granted by the user.
QBluetoothLocalDevice.UnknownError	Unknown error

__init__([parent=None])¶

Parameters:: parent – QObject

Constructs a QBluetoothLocalDevice with parent.

Note

Starting from Android 12 (API level 31), the construction of this class requires bluetooth runtime permissions (BLUETOOTH_SCAN and BLUETOOTH_CONNECT). If the permissions are not granted, the device will not be valid.

See also

isValid()

__init__(address[, parent=None])

Parameters:

address – QBluetoothAddress
parent – QObject

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

Note

See also

isValid()

address()¶

Return type:: QBluetoothAddress

Returns the MAC address of this Bluetooth device.

Note

On Android, this function always returns the constant value 02:00:00:00:00:00 as local address starting with Android 6.0. The programmatic access to the device’s local MAC address was removed.

static allDevices()¶

Return type:: .list of QBluetoothHostInfo

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

connectedDevices()¶

Return type:: .list of QBluetoothAddress

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() deviceDisconnected()

deviceConnected(address)¶

Parameters:: address – QBluetoothAddress

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

See also

deviceDisconnected() connectedDevices()

deviceDisconnected(address)¶

Parameters:: address – QBluetoothAddress

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

See also

deviceConnected() connectedDevices()

errorOccurred(error)¶

Parameters:: error – Error

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

hostMode()¶

Return type:: HostMode

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

See also

setHostMode()

hostModeStateChanged(state)¶

Parameters:: state – HostMode

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

isValid()¶

Return type:: bool

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.

Note

See also

allDevices()

name()¶

Return type:: str

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

pairingFinished(address, pairing)¶

Parameters:

address – QBluetoothAddress
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.

pairingStatus(address)¶

Parameters:: address – QBluetoothAddress
Return type:: Pairing

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

powerOn()¶

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

Note

Due to varying security policies on the supported platforms, this method may have differing behaviors on the various platforms. For example the system may ask the user for confirmation before turning Bluetooth on or off. On macOS it is not possible to power on/off Bluetooth. Please refer to the platform specific Bluetooth documentation for details.

requestPairing(address, pairing)¶

Parameters:

address – QBluetoothAddress
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.

setHostMode(mode)¶

Parameters:: mode – HostMode

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.

Note

Due to varying security policies on the supported platforms, this method may have differing behaviors on the various platforms. For example the system may ask the user for confirmation before turning Bluetooth on or off and not all host modes may be supported. On macOS, it is not possbile to programmatically change the hostMode() . A user can only switch Bluetooth on/off in the System Preferences. On Windows this method must be called from the UI thread because it might require user confirmation. Please refer to the platform specific Bluetooth documentation for details.

See also

hostMode()