QML Bluetooth scanner example doesn't work
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The Qt example to scan Bluetooth devices here or just open up Qt Creator and load it from the example there, doesn't work for me. When I run it ti gives out an error:
qml: Error: Invalid Bluetooth Adapter Error
Of course this is code generated error and here is the actual qml file that generates it (again same as the Qt supplied example).
import QtQuick 2.0 import QtBluetooth 5.2 Item { id: top property BluetoothService currentService BluetoothDiscoveryModel { id: btModel running: true discoveryMode: BluetoothDiscoveryModel.DeviceDiscovery onDiscoveryModeChanged: console.log("Discovery mode: " + discoveryMode) onServiceDiscovered: console.log("Found new service " + service.deviceAddress + " " + service.deviceName + " " + service.serviceName); onDeviceDiscovered: console.log("New device: " + device) onErrorChanged: { switch (btModel.error) { case BluetoothDiscoveryModel.PoweredOffError: console.log("Error: Bluetooth device not turned on"); break; case BluetoothDiscoveryModel.InputOutputError: console.log("Error: Bluetooth I/O Error"); break; case BluetoothDiscoveryModel.InvalidBluetoothAdapterError: console.log("Error: Invalid Bluetooth Adapter Error"); break; case BluetoothDiscoveryModel.NoError: break; default: console.log("Error: Unknown Error"); break; } } } Rectangle { id: busy width: top.width * 0.7; anchors.horizontalCenter: parent.horizontalCenter anchors.top: top.top; height: text.height*1.2; radius: 5 color: "#1c56f3" visible: btModel.running Text { id: text text: "Scanning" font.bold: true font.pointSize: 20 anchors.centerIn: parent } SequentialAnimation on color { id: busyThrobber ColorAnimation { easing.type: Easing.InOutSine; from: "#1c56f3"; to: "white"; duration: 1000; } ColorAnimation { easing.type: Easing.InOutSine; to: "#1c56f3"; from: "white"; duration: 1000 } loops: Animation.Infinite } } ListView { id: mainList width: top.width anchors.top: busy.bottom anchors.bottom: buttonGroup.top anchors.bottomMargin: 10 anchors.topMargin: 10 clip: true model: btModel delegate: Rectangle { id: btDelegate width: parent.width height: column.height + 10 property bool expended: false; clip: true Image { id: bticon source: "qrc:/default.png"; width: bttext.height; height: bttext.height; anchors.top: parent.top anchors.left: parent.left anchors.margins: 5 } Column { id: column anchors.left: bticon.right anchors.leftMargin: 5 Text { id: bttext text: deviceName ? deviceName : name font.family: "FreeSerif" font.pointSize: 16 } Text { id: details function get_details(s) { if (btModel.discoveryMode == BluetoothDiscoveryModel.DeviceDiscovery) { //We are doing a device discovery var str = "Address: " + remoteAddress; return str; } else { var str = "Address: " + s.deviceAddress; if (s.serviceName) { str += "<br>Service: " + s.serviceName; } if (s.serviceDescription) { str += "<br>Description: " + s.serviceDescription; } if (s.serviceProtocol) { str += "<br>Protocol: " + s.serviceProtocol; } return str; } } visible: opacity !== 0 opacity: btDelegate.expended ? 1 : 0.0 text: get_details(service) font.family: "FreeSerif" font.pointSize: 14 Behavior on opacity { NumberAnimation { duration: 200} } } } Behavior on height { NumberAnimation { duration: 200} } MouseArea { anchors.fill: parent onClicked: btDelegate.expended = !btDelegate.expended } } focus: true } Row { id: buttonGroup property var activeButton: devButton anchors.bottom: parent.bottom anchors.horizontalCenter: parent.horizontalCenter anchors.bottomMargin: 5 spacing: 10 Button { id: fdButton width: top.width/3*0.9 //mdButton has longest text height: mdButton.height text: "Full Discovery" onClicked: btModel.discoveryMode = BluetoothDiscoveryModel.FullServiceDiscovery } Button { id: mdButton width: top.width/3*0.9 text: "Minimal Discovery" onClicked: btModel.discoveryMode = BluetoothDiscoveryModel.MinimalServiceDiscovery } Button { id: devButton width: top.width/3*0.9 //mdButton has longest text height: mdButton.height text: "Device Discovery" onClicked: btModel.discoveryMode = BluetoothDiscoveryModel.DeviceDiscovery } } }