1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from PySide6.QtBluetooth import (QBluetoothDeviceDiscoveryAgent,
QBluetoothDeviceInfo)
from PySide6.QtQml import QmlElement
from PySide6.QtCore import QTimer, Property, Signal, Slot
from bluetoothbaseclass import BluetoothBaseClass
from deviceinfo import DeviceInfo
from heartrate_global import simulator
# To be used on the @QmlElement decorator
# (QML_IMPORT_MINOR_VERSION is optional)
QML_IMPORT_NAME = "Shared"
QML_IMPORT_MAJOR_VERSION = 1
@QmlElement
class DeviceFinder(BluetoothBaseClass):
scanningChanged = Signal()
devicesChanged = Signal()
def __init__(self, handler, parent=None):
super().__init__(parent)
self.m_deviceHandler = handler
self.m_devices = []
self.m_demoTimer = QTimer()
#! [devicediscovery-1]
self.m_deviceDiscoveryAgent = QBluetoothDeviceDiscoveryAgent(self)
self.m_deviceDiscoveryAgent.setLowEnergyDiscoveryTimeout(15000)
self.m_deviceDiscoveryAgent.deviceDiscovered.connect(self.addDevice)
self.m_deviceDiscoveryAgent.errorOccurred.connect(self.scanError)
self.m_deviceDiscoveryAgent.finished.connect(self.scanFinished)
self.m_deviceDiscoveryAgent.canceled.connect(self.scanFinished)
#! [devicediscovery-1]
if simulator:
self.m_demoTimer.setSingleShot(True)
self.m_demoTimer.setInterval(2000)
self.m_demoTimer.timeout.connect(self.scanFinished)
@Slot()
def startSearch(self):
self.clearMessages()
self.m_deviceHandler.setDevice(None)
self.m_devices.clear()
self.devicesChanged.emit()
if simulator:
self.m_demoTimer.start()
else:
#! [devicediscovery-2]
self.m_deviceDiscoveryAgent.start(QBluetoothDeviceDiscoveryAgent.LowEnergyMethod)
#! [devicediscovery-2]
self.scanningChanged.emit()
self.info = "Scanning for devices..."
#! [devicediscovery-3]
@Slot(QBluetoothDeviceInfo)
def addDevice(self, device):
# If device is LowEnergy-device, add it to the list
if device.coreConfigurations() & QBluetoothDeviceInfo.LowEnergyCoreConfiguration:
self.m_devices.append(DeviceInfo(device))
self.info = "Low Energy device found. Scanning more..."
#! [devicediscovery-3]
self.devicesChanged.emit()
#! [devicediscovery-4]
#...
#! [devicediscovery-4]
@Slot(QBluetoothDeviceDiscoveryAgent.Error)
def scanError(self, error):
if error == QBluetoothDeviceDiscoveryAgent.PoweredOffError:
self.error = "The Bluetooth adaptor is powered off."
elif error == QBluetoothDeviceDiscoveryAgent.InputOutputError:
self.error = "Writing or reading from the device resulted in an error."
else:
self.error = "An unknown error has occurred."
@Slot()
def scanFinished(self):
if simulator:
# Only for testing
for i in range(5):
self.m_devices.append(DeviceInfo(QBluetoothDeviceInfo()))
if self.m_devices:
self.info = "Scanning done."
else:
self.error = "No Low Energy devices found."
self.scanningChanged.emit()
self.devicesChanged.emit()
@Slot(str)
def connectToService(self, address):
self.m_deviceDiscoveryAgent.stop()
currentDevice = None
for entry in self.m_devices:
device = entry
if device and device.deviceAddress == address:
currentDevice = device
break
if currentDevice:
self.m_deviceHandler.setDevice(currentDevice)
self.clearMessages()
@Property(bool, notify=scanningChanged)
def scanning(self):
if simulator:
return self.m_demoTimer.isActive()
return self.m_deviceDiscoveryAgent.isActive()
@Property("QVariant", notify=devicesChanged)
def devices(self):
return self.m_devices
|
