diff -Nru bluez-qt-5.80.0/CMakeLists.txt bluez-qt-5.81.0/CMakeLists.txt
--- bluez-qt-5.80.0/CMakeLists.txt	2021-03-01 12:14:04.000000000 +0000
+++ bluez-qt-5.81.0/CMakeLists.txt	2021-04-03 09:27:40.000000000 +0000
@@ -1,10 +1,10 @@
 cmake_minimum_required(VERSION 3.5)
 
-set(KF_VERSION "5.80.0") # handled by release scripts
+set(KF_VERSION "5.81.0") # handled by release scripts
 project(BluezQt VERSION ${KF_VERSION})
 
 include(FeatureSummary)
-find_package(ECM 5.80.0 NO_MODULE)
+find_package(ECM 5.81.0 NO_MODULE)
 set_package_properties(ECM PROPERTIES TYPE REQUIRED DESCRIPTION "Extra CMake Modules." URL "https://commits.kde.org/extra-cmake-modules")
 feature_summary(WHAT REQUIRED_PACKAGES_NOT_FOUND FATAL_ON_MISSING_REQUIRED_PACKAGES)
 
diff -Nru bluez-qt-5.80.0/debian/changelog bluez-qt-5.81.0/debian/changelog
--- bluez-qt-5.80.0/debian/changelog	2021-03-18 11:05:48.000000000 +0000
+++ bluez-qt-5.81.0/debian/changelog	2021-04-28 09:26:57.000000000 +0000
@@ -1,3 +1,9 @@
+bluez-qt (5.81.0-0ubuntu1) impish; urgency=medium
+
+  * New upstream release (5.81.0)
+
+ -- Rik Mills <rikmills@kde.org>  Wed, 28 Apr 2021 10:26:57 +0100
+
 bluez-qt (5.80.0-0ubuntu1) hirsute; urgency=medium
 
   * New upstream release (5.80.0)
diff -Nru bluez-qt-5.80.0/debian/control bluez-qt-5.81.0/debian/control
--- bluez-qt-5.80.0/debian/control	2021-03-18 11:05:48.000000000 +0000
+++ bluez-qt-5.81.0/debian/control	2021-04-28 09:26:57.000000000 +0000
@@ -8,7 +8,7 @@
                dbus-x11,
                debhelper-compat (= 13),
                doxygen,
-               extra-cmake-modules (>= 5.80.0~),
+               extra-cmake-modules (>= 5.81.0~),
                graphviz,
                libqt5sql5-sqlite,
                pkg-kde-tools (>> 0.15.15),
diff -Nru bluez-qt-5.80.0/src/CMakeLists.txt bluez-qt-5.81.0/src/CMakeLists.txt
--- bluez-qt-5.80.0/src/CMakeLists.txt	2021-03-01 12:14:04.000000000 +0000
+++ bluez-qt-5.81.0/src/CMakeLists.txt	2021-04-03 09:27:40.000000000 +0000
@@ -85,6 +85,7 @@
 qt5_add_dbus_interface(bluezqt_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/org.bluez.Media1.xml bluezmedia1)
 qt5_add_dbus_interface(bluezqt_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/org.bluez.MediaEndpoint1.xml bluezmediaendpoint1)
 qt5_add_dbus_interface(bluezqt_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/org.bluez.MediaPlayer1.xml bluezmediaplayer1)
+qt5_add_dbus_interface(bluezqt_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/org.bluez.MediaTransport1.xml bluezmediatransport1)
 qt5_add_dbus_interface(bluezqt_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/org.bluez.obex.AgentManager1.xml obexagentmanager1)
 qt5_add_dbus_interface(bluezqt_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/org.bluez.obex.Client1.xml obexclient1)
 qt5_add_dbus_interface(bluezqt_SRCS ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/org.bluez.obex.Transfer1.xml obextransfer1)
diff -Nru bluez-qt-5.80.0/src/gattmanager.cpp bluez-qt-5.81.0/src/gattmanager.cpp
--- bluez-qt-5.80.0/src/gattmanager.cpp	2021-03-01 12:14:04.000000000 +0000
+++ bluez-qt-5.81.0/src/gattmanager.cpp	2021-04-03 09:27:40.000000000 +0000
@@ -19,7 +19,6 @@
 #include "pendingcall.h"
 #include "utils.h"
 
-#include <QDBusInterface>
 #include <QDBusPendingCall>
 
 namespace BluezQt
@@ -62,9 +61,7 @@
         qCDebug(BLUEZQT) << "Cannot register object" << application->objectPath().path();
     }
 
-    QList<QVariant> argumentList;
-    argumentList << QVariant::fromValue(application->objectPath()) << QVariantMap();
-    return new PendingCall(d->m_dbusInterface->asyncCallWithArgumentList(QStringLiteral("RegisterApplication"), argumentList), PendingCall::ReturnVoid, this);
+    return new PendingCall(d->m_dbusInterface.RegisterApplication(application->objectPath(), QVariantMap()), PendingCall::ReturnVoid, this);
 }
 
 PendingCall *GattManager::unregisterApplication(GattApplication *application)
@@ -73,9 +70,7 @@
 
     DBusConnection::orgBluez().unregisterObject(application->objectPath().path());
 
-    QList<QVariant> argumentList;
-    argumentList << QVariant::fromValue(application->objectPath());
-    return new PendingCall(d->m_dbusInterface->asyncCallWithArgumentList(QStringLiteral("UnregisterApplication"), argumentList), PendingCall::ReturnVoid, this);
+    return new PendingCall(d->m_dbusInterface.UnregisterApplication(application->objectPath()), PendingCall::ReturnVoid, this);
 }
 
 } // namespace BluezQt
diff -Nru bluez-qt-5.80.0/src/gattmanager_p.cpp bluez-qt-5.81.0/src/gattmanager_p.cpp
--- bluez-qt-5.80.0/src/gattmanager_p.cpp	2021-03-01 12:14:04.000000000 +0000
+++ bluez-qt-5.81.0/src/gattmanager_p.cpp	2021-04-03 09:27:40.000000000 +0000
@@ -9,18 +9,15 @@
 #include "gattmanager_p.h"
 #include "utils.h"
 
-#include <QDBusInterface>
-
 namespace BluezQt
 {
 GattManagerPrivate::GattManagerPrivate(const QString &path)
+    : m_dbusInterface(Strings::orgBluez(), path, DBusConnection::orgBluez())
 {
-    m_dbusInterface = new QDBusInterface(Strings::orgBluez(), path, QStringLiteral("org.bluez.GattManager1"), DBusConnection::orgBluez());
 }
 
 GattManagerPrivate::~GattManagerPrivate()
 {
-    delete m_dbusInterface;
 }
 
 } // namespace BluezQt
diff -Nru bluez-qt-5.80.0/src/gattmanager_p.h bluez-qt-5.81.0/src/gattmanager_p.h
--- bluez-qt-5.80.0/src/gattmanager_p.h	2021-03-01 12:14:04.000000000 +0000
+++ bluez-qt-5.81.0/src/gattmanager_p.h	2021-04-03 09:27:40.000000000 +0000
@@ -8,7 +8,8 @@
 
 #pragma once
 
-class QDBusInterface;
+#include "bluezgattmanager1.h"
+
 class QString;
 
 namespace BluezQt
@@ -19,7 +20,7 @@
     GattManagerPrivate(const QString &path);
     ~GattManagerPrivate();
 
-    QDBusInterface *m_dbusInterface = nullptr;
+    OrgBluezGattManager1Interface m_dbusInterface;
 };
 
 } // namespace BluezQt
diff -Nru bluez-qt-5.80.0/src/imports/declarativeadapter.cpp bluez-qt-5.81.0/src/imports/declarativeadapter.cpp
--- bluez-qt-5.80.0/src/imports/declarativeadapter.cpp	2021-03-01 12:14:04.000000000 +0000
+++ bluez-qt-5.81.0/src/imports/declarativeadapter.cpp	2021-04-03 09:27:40.000000000 +0000
@@ -9,7 +9,7 @@
 #include "declarativeadapter.h"
 #include "declarativedevice.h"
 
-static int devicesCountFunction(QQmlListProperty<DeclarativeDevice> *property)
+static int devicesCountDeclarativeAdapterFunction(QQmlListProperty<DeclarativeDevice> *property)
 {
     Q_ASSERT(qobject_cast<DeclarativeAdapter *>(property->object));
     DeclarativeAdapter *adapter = static_cast<DeclarativeAdapter *>(property->object);
@@ -17,7 +17,7 @@
     return adapter->m_devices.count();
 }
 
-static DeclarativeDevice *devicesAtFunction(QQmlListProperty<DeclarativeDevice> *property, int index)
+static DeclarativeDevice *devicesAtDeclarativeAdapterFunction(QQmlListProperty<DeclarativeDevice> *property, int index)
 {
     Q_ASSERT(qobject_cast<DeclarativeAdapter *>(property->object));
     DeclarativeAdapter *adapter = static_cast<DeclarativeAdapter *>(property->object);
@@ -154,7 +154,7 @@
 
 QQmlListProperty<DeclarativeDevice> DeclarativeAdapter::devices()
 {
-    return QQmlListProperty<DeclarativeDevice>(this, nullptr, devicesCountFunction, devicesAtFunction);
+    return QQmlListProperty<DeclarativeDevice>(this, nullptr, devicesCountDeclarativeAdapterFunction, devicesAtDeclarativeAdapterFunction);
 }
 
 DeclarativeDevice *DeclarativeAdapter::deviceForAddress(const QString &address) const
diff -Nru bluez-qt-5.80.0/src/interfaces/org.bluez.MediaTransport1.xml bluez-qt-5.81.0/src/interfaces/org.bluez.MediaTransport1.xml
--- bluez-qt-5.80.0/src/interfaces/org.bluez.MediaTransport1.xml	1970-01-01 00:00:00.000000000 +0000
+++ bluez-qt-5.81.0/src/interfaces/org.bluez.MediaTransport1.xml	2021-04-03 09:27:40.000000000 +0000
@@ -0,0 +1,25 @@
+<?xml version="1.0"?>
+<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN" "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
+<node>
+  <interface name="org.bluez.MediaTransport1">
+    <method name="Acquire">
+      <arg name="fd" type="h" direction="out"/>
+      <arg name="mtu_r" type="q" direction="out"/>
+      <arg name="mtu_w" type="q" direction="out"/>
+    </method>
+    <method name="TryAcquire">
+      <arg name="fd" type="h" direction="out"/>
+      <arg name="mtu_r" type="q" direction="out"/>
+      <arg name="mtu_w" type="q" direction="out"/>
+    </method>
+    <method name="Release" />
+
+    <property name="Device" type="o" access="read" />
+    <property name="UUID" type="s" access="read" />
+    <property name="Codec" type="y" access="read" />
+    <property name="Configuration" type="ay" access="read" />
+    <property name="State" type="s" access="read" />
+    <property name="Delay" type="q" access="read" />
+    <property name="Volume" type="q" access="readwrite" />
+  </interface>
+</node>
diff -Nru bluez-qt-5.80.0/src/mediatransport.cpp bluez-qt-5.81.0/src/mediatransport.cpp
--- bluez-qt-5.80.0/src/mediatransport.cpp	2021-03-01 12:14:04.000000000 +0000
+++ bluez-qt-5.81.0/src/mediatransport.cpp	2021-04-03 09:27:40.000000000 +0000
@@ -39,17 +39,17 @@
 
 TPendingCall<QDBusUnixFileDescriptor, uint16_t, uint16_t> *MediaTransport::acquire()
 {
-    return new TPendingCall<QDBusUnixFileDescriptor, uint16_t, uint16_t>(d->m_dbusInterface->asyncCall(QStringLiteral("Acquire")), this);
+    return new TPendingCall<QDBusUnixFileDescriptor, uint16_t, uint16_t>(d->m_dbusInterface.Acquire(), this);
 }
 
 TPendingCall<QDBusUnixFileDescriptor, uint16_t, uint16_t> *MediaTransport::tryAcquire()
 {
-    return new TPendingCall<QDBusUnixFileDescriptor, uint16_t, uint16_t>(d->m_dbusInterface->asyncCall(QStringLiteral("TryAcquire")), this);
+    return new TPendingCall<QDBusUnixFileDescriptor, uint16_t, uint16_t>(d->m_dbusInterface.TryAcquire(), this);
 }
 
 TPendingCall<void> *MediaTransport::release()
 {
-    return new TPendingCall<void>(d->m_dbusInterface->asyncCall(QStringLiteral("Release")), this);
+    return new TPendingCall<void>(d->m_dbusInterface.Release(), this);
 }
 
 } // namespace BluezQt
diff -Nru bluez-qt-5.80.0/src/mediatransport_p.cpp bluez-qt-5.81.0/src/mediatransport_p.cpp
--- bluez-qt-5.80.0/src/mediatransport_p.cpp	2021-03-01 12:14:04.000000000 +0000
+++ bluez-qt-5.81.0/src/mediatransport_p.cpp	2021-04-03 09:27:40.000000000 +0000
@@ -81,11 +81,10 @@
 
 MediaTransportPrivate::MediaTransportPrivate(const QString &path, const QVariantMap &properties)
     : QObject()
+    , m_dbusInterface(Strings::orgBluez(), path, DBusConnection::orgBluez())
     , m_dbusProperties(nullptr)
     , m_path(path)
 {
-    m_dbusInterface = new QDBusInterface(Strings::orgBluez(), path, QStringLiteral("org.bluez.MediaTransport1"), DBusConnection::orgBluez(), this);
-
     DBusConnection::orgBluez().connect(Strings::orgBluez(),
                                        path,
                                        Strings::orgFreedesktopDBusProperties(),
diff -Nru bluez-qt-5.80.0/src/mediatransport_p.h bluez-qt-5.81.0/src/mediatransport_p.h
--- bluez-qt-5.80.0/src/mediatransport_p.h	2021-03-01 12:14:04.000000000 +0000
+++ bluez-qt-5.81.0/src/mediatransport_p.h	2021-04-03 09:27:40.000000000 +0000
@@ -8,6 +8,7 @@
 
 #pragma once
 
+#include "bluezmediatransport1.h"
 #include "dbusproperties.h"
 #include "mediatransport.h"
 
@@ -29,7 +30,7 @@
 
 public:
     QWeakPointer<MediaTransport> q;
-    QDBusInterface *m_dbusInterface;
+    OrgBluezMediaTransport1Interface m_dbusInterface;
     DBusProperties *m_dbusProperties;
 
     QString m_path;