Index: sources/bluetooth/BluetoothInterface.cpp
===================================================================
diff -u -r3e682c5afdadcf4dd2006e3d975fbee58e48619e -rc2f474ff07c98aa350c445a2474976a3cf985f40
--- sources/bluetooth/BluetoothInterface.cpp	(.../BluetoothInterface.cpp)	(revision 3e682c5afdadcf4dd2006e3d975fbee58e48619e)
+++ sources/bluetooth/BluetoothInterface.cpp	(.../BluetoothInterface.cpp)	(revision c2f474ff07c98aa350c445a2474976a3cf985f40)
@@ -672,7 +672,11 @@
 void BluetoothInterface::onServiceCharacteristicChanged (const QLowEnergyCharacteristic &vCharacteristic, const QByteArray &vValue) {
     QLowEnergyService *service = reinterpret_cast<QLowEnergyService *>(sender());
     NOTIFY_DETAILS_CHANGE
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     if (vCharacteristic.uuid() == QBluetoothUuid(QBluetoothUuid::CharacteristicType::BloodPressureMeasurement))
+#else
+    if (vCharacteristic.uuid() == QBluetoothUuid(QBluetoothUuid::BloodPressureMeasurement))
+#endif
     {
         interpretBloodPressure(vValue);
     }
@@ -731,7 +735,11 @@
 void BluetoothInterface::onServiceDescriptorWritten     (const QLowEnergyDescriptor     &vDescriptor    , const QByteArray &vValue) {
     QLowEnergyService *service = reinterpret_cast<QLowEnergyService *>(sender());
     NOTIFY_CONFIG_WRITE
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     if ( vDescriptor.uuid() == QBluetoothUuid::DescriptorType::ClientCharacteristicConfiguration && vValue == _bloodPressureNotifyValue ) {
+#else
+    if ( vDescriptor.uuid() == QBluetoothUuid(QBluetoothUuid::ClientCharacteristicConfiguration) && vValue == _bloodPressureNotifyValue ) {
+#endif
         _reconnectionActive = true;
     }
 }
@@ -756,20 +764,44 @@
     if ( ! sender() ) return;
     QLowEnergyService *service = reinterpret_cast<QLowEnergyService *>(sender());
     switch (vState) {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     case QLowEnergyService::RemoteServiceDiscovered   : {
+#else
+    case QLowEnergyService::ServiceDiscovered   : {
+#endif
         NOTIFY_SERVICE_DETAILS_DONE
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
         switch(QBluetoothUuid::ServiceClassUuid(service->serviceUuid().toUInt32())) {
+#else
+        switch( service->serviceUuid().toUInt32() ) {
+#endif
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
         case QBluetoothUuid::ServiceClassUuid::BloodPressure:
+#else
+        case QBluetoothUuid::BloodPressure:
+#endif
             enableNotify();
             break;
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
         case QBluetoothUuid::ServiceClassUuid::DeviceInformation:
+#else
+        case QBluetoothUuid::DeviceInformation:
+#endif
             interpretInformation();
             break;
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
         case QBluetoothUuid::ServiceClassUuid::BatteryService     : {
+#else
+        case QBluetoothUuid::BatteryService     : {
+#endif
             int index = 0;
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
             QByteArray data = service->characteristic(QBluetoothUuid::CharacteristicType::BatteryLevel).value();
+#else
+            QByteArray data = service->characteristic(QBluetoothUuid::BatteryLevel).value();
+#endif
             Types::U08 batteryLevel;
             if (GetValue(data, index, batteryLevel)) {
                 _tempBatt = batteryLevel.value;
@@ -1082,22 +1114,38 @@
  */
 void BluetoothInterface::makeServices(const QBluetoothUuid &vService)
 {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     if (vService == QBluetoothUuid  (QBluetoothUuid::ServiceClassUuid::DeviceInformation  )) {
+#else
+    if (vService == QBluetoothUuid  (QBluetoothUuid::DeviceInformation  )) {
+#endif
         _serviceDeviceInformation   = _device->createServiceObject(vService, this);
         initConnectionsService      (_serviceDeviceInformation   );
         return;
     }
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     if (vService == QBluetoothUuid  (QBluetoothUuid::ServiceClassUuid::CurrentTimeService )) {
+#else
+    if (vService == QBluetoothUuid  (QBluetoothUuid::CurrentTimeService )) {
+#endif
         _serviceCurrentTime         = _device->createServiceObject(vService, this);
         initConnectionsService      (_serviceCurrentTime         );
         return;
     }
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     if (vService == QBluetoothUuid  (QBluetoothUuid::ServiceClassUuid::BloodPressure      )) {
+#else
+    if (vService == QBluetoothUuid  (QBluetoothUuid::BloodPressure      )) {
+#endif
         _serviceBloodPressure       = _device->createServiceObject(vService, this);
         initConnectionsService      (_serviceBloodPressure       );
         return;
     }
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     if (vService == QBluetoothUuid  (QBluetoothUuid::ServiceClassUuid::BatteryService     )) {
+#else
+    if (vService == QBluetoothUuid  (QBluetoothUuid::BatteryService     )) {
+#endif
         _serviceBattery             = _device->createServiceObject(vService, this);
         initConnectionsService      (_serviceBattery             );
         return;
@@ -1174,8 +1222,13 @@
     }
 
     // blood pressure measurements
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     const QLowEnergyCharacteristic detailBPMeas = _serviceBloodPressure->characteristic(QBluetoothUuid::CharacteristicType::BloodPressureMeasurement);
     QLowEnergyDescriptor configBPMeas = detailBPMeas.descriptor(QBluetoothUuid::DescriptorType::ClientCharacteristicConfiguration);
+#else
+    const QLowEnergyCharacteristic detailBPMeas = _serviceBloodPressure->characteristic(QBluetoothUuid(QBluetoothUuid::BloodPressureMeasurement));
+    QLowEnergyDescriptor configBPMeas = detailBPMeas.descriptor(QBluetoothUuid::ClientCharacteristicConfiguration);
+#endif
     if (configBPMeas.isValid()) _serviceBloodPressure->writeDescriptor(configBPMeas, _bloodPressureNotifyValue);
 }
 
@@ -1253,7 +1306,11 @@
         return;
     }
     // blood pressure feature
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     const QLowEnergyCharacteristic detailBPFeat = _serviceBloodPressure->characteristic(QBluetoothUuid::CharacteristicType::BloodPressureFeature);
+#else
+    const QLowEnergyCharacteristic detailBPFeat = _serviceBloodPressure->characteristic(QBluetoothUuid(QBluetoothUuid::BloodPressureFeature));
+#endif
     if (!detailBPFeat.isValid()) {
         qDebug() << "Blood pressure feature not found.";
         return;
@@ -1285,7 +1342,11 @@
         return;
     }
     // battery level percent
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     const QLowEnergyCharacteristic detail = _serviceBloodPressure->characteristic(QBluetoothUuid::CharacteristicType::BatteryLevel);
+#else
+    const QLowEnergyCharacteristic detail = _serviceBloodPressure->characteristic(QBluetoothUuid(QBluetoothUuid::BatteryLevel));
+#endif
     if (!detail.isValid()) {
         qDebug() << "Battery level not found.";
         return;