fix crash in BT setup

libnymea-app-core/wifisetup/bluetoothdiscovery.cpp

@@ -157,22 +157,22 @@ void BluetoothDiscovery::deviceDiscovered(const QBluetoothDeviceInfo &deviceInfo
 
     // Check if we already have added this device info
     foreach (BluetoothDeviceInfo *di, m_deviceInfos->deviceInfos()) {
-        if (di->name() == deviceInformation->name() && di->address() == deviceInformation->address()) {
+        if (di->address() == deviceInformation->address()) {
             qWarning() << "BluetoothDiscover: device" << deviceInformation->name() << "(" << deviceInformation->address() << ") already added";
             deviceInformation->deleteLater();
-            deviceInformation = nullptr;
+            return;
         }
     }
 
-    if (deviceInformation)
-        m_deviceInfos->addBluetoothDeviceInfo(deviceInformation);
-
+    m_deviceInfos->addBluetoothDeviceInfo(deviceInformation);
 }
 
 void BluetoothDiscovery::discoveryFinished()
 {
     qDebug() << "BluetoothDiscovery: Discovery finished";
-    setDiscovering(false);
+    if (m_enabled) {
+        m_discoveryAgent->start();
+    }
 }
 
 void BluetoothDiscovery::onError(const QBluetoothDeviceDiscoveryAgent::Error &error)

nymea-app/ui/connection/BluetoothDiscoveryPage.qml

@@ -10,19 +10,8 @@ Page {
     header: GuhHeader {
         text: qsTr("Bluetooth discovery")
         onBackPressed: pageStack.pop()
-
-        HeaderButton {
-            imageSource: Qt.resolvedUrl("../images/refresh.svg")
-            onClicked: {
-                if (Engine.bluetoothDiscovery.bluetoothAvailable) {
-                    Engine.bluetoothDiscovery.start()
-                }
-            }
-            enabled: Engine.bluetoothDiscovery.bluetoothAvailable && Engine.bluetoothDiscovery.bluetoothEnabled && !Engine.bluetoothDiscovery.discovering
-        }
     }
 
-
     Component.onCompleted: Engine.bluetoothDiscovery.start()
 
     function setupDevice(name, btAddress) {
@@ -30,6 +19,15 @@ Page {
         pageStack.push(connectingPageComponent, { name: name, address: btAddress } )
     }
 
+    Connections {
+        target: pageStack
+        onCurrentItemChanged: {
+            if (pageStack.currentItem === root) {
+                Engine.bluetoothDiscovery.start();
+            }
+        }
+    }
+
     ColumnLayout {
         anchors.fill: parent
         spacing: app.margins