diff --git a/libnymea-zigbee/libnymea-zigbee.pro b/libnymea-zigbee/libnymea-zigbee.pro
index 038a451..69b090a 100644
--- a/libnymea-zigbee/libnymea-zigbee.pro
+++ b/libnymea-zigbee/libnymea-zigbee.pro
@@ -54,6 +54,7 @@ SOURCES += \
     zcl/measurement/zigbeeclusterrelativehumiditymeasurement.cpp \
     zcl/measurement/zigbeeclustertemperaturemeasurement.cpp \
     zcl/ota/zigbeeclusterota.cpp \
+    zcl/security/zigbeeclusteriaswd.cpp \
     zcl/security/zigbeeclusteriaszone.cpp \
     zcl/smartenergy/zigbeeclustermetering.cpp \
     zcl/zigbeecluster.cpp \
@@ -129,6 +130,7 @@ HEADERS += \
     zcl/measurement/zigbeeclusterrelativehumiditymeasurement.h \
     zcl/measurement/zigbeeclustertemperaturemeasurement.h \
     zcl/ota/zigbeeclusterota.h \
+    zcl/security/zigbeeclusteriaswd.h \
     zcl/security/zigbeeclusteriaszone.h \
     zcl/smartenergy/zigbeeclustermetering.h \
     zcl/zigbeecluster.h \
diff --git a/libnymea-zigbee/zcl/security/zigbeeclusteriaswd.cpp b/libnymea-zigbee/zcl/security/zigbeeclusteriaswd.cpp
new file mode 100644
index 0000000..ae6bb0e
--- /dev/null
+++ b/libnymea-zigbee/zcl/security/zigbeeclusteriaswd.cpp
@@ -0,0 +1,83 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+*
+* Copyright 2013 - 2020, nymea GmbH
+* Contact: contact@nymea.io
+*
+* This file is part of nymea-zigbee.
+* This project including source code and documentation is protected by copyright law, and
+* remains the property of nymea GmbH. All rights, including reproduction, publication,
+* editing and translation, are reserved. The use of this project is subject to the terms of a
+* license agreement to be concluded with nymea GmbH in accordance with the terms
+* of use of nymea GmbH, available under https://nymea.io/license
+*
+* GNU Lesser General Public License Usage
+* Alternatively, this project may be redistributed and/or modified under the terms of the GNU
+* Lesser General Public License as published by the Free Software Foundation; version 3.
+* this project is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+* See the GNU Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public License along with this project.
+* If not, see <https://www.gnu.org/licenses/>.
+*
+* For any further details and any questions please contact us under contact@nymea.io
+* or see our FAQ/Licensing Information on https://nymea.io/license/faq
+*
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include "zigbeeclusteriaswd.h"
+
+#include "loggingcategory.h"
+
+#include <QDataStream>
+
+ZigbeeClusterIasWd::ZigbeeClusterIasWd(ZigbeeNetwork *network, ZigbeeNode *node, ZigbeeNodeEndpoint *endpoint, Direction direction, QObject *parent):
+    ZigbeeCluster(network, node, endpoint, ZigbeeClusterLibrary::ClusterIdIasWd, direction, parent)
+{
+
+}
+
+ZigbeeClusterReply *ZigbeeClusterIasWd::startWarning(WarningMode warningMode, bool strobeEnabled, SirenLevel sirenLevel, quint16 duration, quint8 strobeDutyCycle, StrobeLevel strobeLevel)
+{
+    QByteArray payload;
+    QDataStream stream(&payload, QIODevice::WriteOnly);
+    stream.setByteOrder(QDataStream::LittleEndian);
+    stream << static_cast<quint8>(warningMode | (strobeEnabled ? 0x04 : 0x00) | sirenLevel);
+    stream << duration;
+    stream << strobeDutyCycle;
+    stream << static_cast<quint8>(strobeLevel);
+    qCDebug(dcZigbeeCluster) << "Sending payload:" << payload.toHex();
+    qCDebug(dcZigbeeCluster) << "1:" << static_cast<quint8>(warningMode | (strobeEnabled ? 0x04 : 0x00) | sirenLevel);
+    ZigbeeClusterReply *reply = executeClusterCommand(ServerCommandStartWarning, payload);
+    return reply;
+}
+
+ZigbeeClusterReply *ZigbeeClusterIasWd::squawk(SquawkMode squawkMode, bool strobeEnabled, SquawkLevel squawkLevel)
+{
+    QByteArray payload;
+    QDataStream stream(&payload, QIODevice::WriteOnly);
+    stream.setByteOrder(QDataStream::LittleEndian);
+    stream << static_cast<quint8>(squawkMode | (strobeEnabled ? 0x08 : 0x00) | squawkLevel);
+    qCDebug(dcZigbeeCluster) << "Sending payload:" << payload.toHex();
+    ZigbeeClusterReply *reply = executeClusterCommand(ServerCommandSquawk, payload);
+    return reply;
+}
+
+
+void ZigbeeClusterIasWd::setAttribute(const ZigbeeClusterAttribute &attribute)
+{
+    qCDebug(dcZigbeeCluster()) << "Update attribute" << m_node << m_endpoint << this << static_cast<Attribute>(attribute.id()) << attribute.dataType();
+    ZigbeeCluster::setAttribute(attribute);
+
+    if (attribute.id() == AttributeMaxDuration) {
+        bool valueOk = false;
+        quint8 value = attribute.dataType().toUInt16(&valueOk);
+        if (valueOk) {
+            m_maxDuration = value;
+            qCDebug(dcZigbeeCluster()) << "IAS WD max duration changed on" << m_node << m_endpoint << this << m_maxDuration << "s";
+            emit maxDurationChanged(m_maxDuration);
+        } else {
+            qCWarning(dcZigbeeCluster()) << "Failed to parse IAS WD max duration attribute data"  << m_node << m_endpoint << this << attribute;
+        }
+    }
+}
diff --git a/libnymea-zigbee/zcl/security/zigbeeclusteriaswd.h b/libnymea-zigbee/zcl/security/zigbeeclusteriaswd.h
new file mode 100644
index 0000000..c39121d
--- /dev/null
+++ b/libnymea-zigbee/zcl/security/zigbeeclusteriaswd.h
@@ -0,0 +1,119 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+*
+* Copyright 2013 - 2022, nymea GmbH
+* Contact: contact@nymea.io
+*
+* This file is part of nymea-zigbee.
+* This project including source code and documentation is protected by copyright law, and
+* remains the property of nymea GmbH. All rights, including reproduction, publication,
+* editing and translation, are reserved. The use of this project is subject to the terms of a
+* license agreement to be concluded with nymea GmbH in accordance with the terms
+* of use of nymea GmbH, available under https://nymea.io/license
+*
+* GNU Lesser General Public License Usage
+* Alternatively, this project may be redistributed and/or modified under the terms of the GNU
+* Lesser General Public License as published by the Free Software Foundation; version 3.
+* this project is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+* See the GNU Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public License along with this project.
+* If not, see <https://www.gnu.org/licenses/>.
+*
+* For any further details and any questions please contact us under contact@nymea.io
+* or see our FAQ/Licensing Information on https://nymea.io/license/faq
+*
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#ifndef ZIGBEECLUSTERIASWD_H
+#define ZIGBEECLUSTERIASWD_H
+
+#include <QObject>
+
+#include "zcl/zigbeecluster.h"
+#include "zcl/zigbeeclusterreply.h"
+
+class ZigbeeNode;
+class ZigbeeNetwork;
+class ZigbeeNodeEndpoint;
+class ZigbeeNetworkReply;
+
+class ZigbeeClusterIasWd: public ZigbeeCluster
+{
+    Q_OBJECT
+
+    friend class ZigbeeNode;
+    friend class ZigbeeNetwork;
+
+public:
+    enum Attribute {
+        AttributeMaxDuration = 0x0000,
+    };
+    Q_ENUM(Attribute)
+
+    enum WarningMode {
+        WarningModeStop = 0x00,
+        WarningModeBurglar = 0x10,
+        WarningModeFire = 0x20,
+        WarningModeEmergency = 0x30,
+        WarningModePolicePanic = 0x40,
+        WarningModeFirePanic = 0x50,
+        WarningModeEmergencyPanic = 0x60,
+    };
+    Q_ENUM(WarningMode)
+
+    enum SirenLevel {
+        SirenLevelLow = 0x00,
+        SirenLevelMedium = 0x01,
+        SirenLevelHigh = 0x02,
+        SirenLevelVeryHigh = 0x03
+    };
+    Q_ENUM(SirenLevel)
+
+    enum StrobeLevel {
+        StrobeLevelLow = 0x00,
+        StrobeLevelMedium = 0x01,
+        StrobeLevelHigh = 0x02,
+        StrobeLevelVeryHigh = 0x03
+    };
+    Q_ENUM(StrobeLevel)
+
+    enum SquawkMode {
+        SquawkModeSystemArmed = 0x00,
+        SquawkModeSystemDisarmed = 0x10
+    };
+    Q_ENUM(SquawkMode)
+
+    enum SquawkLevel {
+        SquawkLevelLow = 0x00,
+        SquawkLevelMedium = 0x01,
+        SquawkLevelHigh = 0x02,
+        SquawkLevelVeryHigh = 0x03
+    };
+    Q_ENUM(SquawkLevel)
+
+    enum ServerCommand {
+        ServerCommandStartWarning = 0x00, // M
+        ServerCommandSquawk = 0x01 // M
+    };
+    Q_ENUM(ServerCommand)
+
+    explicit ZigbeeClusterIasWd(ZigbeeNetwork *network, ZigbeeNode *node, ZigbeeNodeEndpoint *endpoint, Direction direction, QObject *parent = nullptr);
+
+    quint16 maxDuration() const;
+    ZigbeeClusterReply* setMaxDuration(quint16 maxDuration);
+
+    ZigbeeClusterReply* startWarning(WarningMode warningMode, bool strobeEnabled, SirenLevel sirenLevel, quint16 duration, quint8 strobeDutyCycle, StrobeLevel strobeLevel);
+    ZigbeeClusterReply* squawk(SquawkMode squawkMode, bool strobeEnabled, SquawkLevel squawkLevel);
+
+signals:
+    void maxDurationChanged(quint16 maxDuration);
+
+private:
+    void setAttribute(const ZigbeeClusterAttribute &attribute) override;
+
+private:
+    quint16 m_maxDuration = 240;
+};
+
+#endif // ZIGBEECLUSTERIASWD_H
diff --git a/libnymea-zigbee/zigbeenode.h b/libnymea-zigbee/zigbeenode.h
index be6d5ae..5a6631f 100644
--- a/libnymea-zigbee/zigbeenode.h
+++ b/libnymea-zigbee/zigbeenode.h
@@ -37,6 +37,7 @@
 #include "zigbeenodeendpoint.h"
 #include "zdo/zigbeedeviceobject.h"
 #include "zdo/zigbeedeviceprofile.h"
+#include "zcl/general/zigbeeclusterbasic.h"
 
 class ZigbeeNetwork;
 
diff --git a/libnymea-zigbee/zigbeenodeendpoint.cpp b/libnymea-zigbee/zigbeenodeendpoint.cpp
index be6a16f..9e0b376 100644
--- a/libnymea-zigbee/zigbeenodeendpoint.cpp
+++ b/libnymea-zigbee/zigbeenodeendpoint.cpp
@@ -30,6 +30,45 @@
 #include "zigbeenode.h"
 #include "loggingcategory.h"
 
+#include "zcl/general/zigbeeclusterbasic.h"
+#include "zcl/general/zigbeeclusteronoff.h"
+#include "zcl/general/zigbeeclusteridentify.h"
+#include "zcl/general/zigbeeclusterlevelcontrol.h"
+#include "zcl/general/zigbeeclusterpowerconfiguration.h"
+#include "zcl/general/zigbeeclustergroups.h"
+#include "zcl/general/zigbeeclusterscenes.h"
+#include "zcl/general/zigbeeclusteranaloginput.h"
+#include "zcl/general/zigbeeclusteranalogoutput.h"
+#include "zcl/general/zigbeeclusteranalogvalue.h"
+#include "zcl/general/zigbeeclusterbinaryinput.h"
+#include "zcl/general/zigbeeclusterbinaryoutput.h"
+#include "zcl/general/zigbeeclusterbinaryvalue.h"
+#include "zcl/general/zigbeeclustermultistateinput.h"
+#include "zcl/general/zigbeeclustermultistateoutput.h"
+#include "zcl/general/zigbeeclustermultistatevalue.h"
+
+#include "zcl/closures/zigbeeclusterdoorlock.h"
+
+#include "zcl/measurement/zigbeeclusteroccupancysensing.h"
+#include "zcl/measurement/zigbeeclusterilluminancemeasurment.h"
+#include "zcl/measurement/zigbeeclustertemperaturemeasurement.h"
+#include "zcl/measurement/zigbeeclusterrelativehumiditymeasurement.h"
+#include "zcl/measurement/zigbeeclusterpressuremeasurement.h"
+#include "zcl/measurement/zigbeeclusterelectricalmeasurement.h"
+
+#include "zcl/lighting/zigbeeclustercolorcontrol.h"
+
+#include "zcl/security/zigbeeclusteriaszone.h"
+#include "zcl/security/zigbeeclusteriaswd.h"
+
+#include "zcl/ota/zigbeeclusterota.h"
+
+#include "zcl/hvac/zigbeeclusterthermostat.h"
+
+#include "zcl/smartenergy/zigbeeclustermetering.h"
+
+#include "zcl/manufacturerspecific/philips/zigbeeclustermanufacturerspecificphilips.h"
+
 quint8 ZigbeeNodeEndpoint::endpointId() const
 {
     return m_endpointId;
@@ -224,6 +263,9 @@ ZigbeeCluster *ZigbeeNodeEndpoint::createCluster(ZigbeeClusterLibrary::ClusterId
     case ZigbeeClusterLibrary::ClusterIdIasZone:
         return new ZigbeeClusterIasZone(m_network, m_node, this, direction, this);
 
+    case ZigbeeClusterLibrary::ClusterIdIasWd:
+        return new ZigbeeClusterIasWd(m_network, m_node, this, direction, this);
+
         // OTA
     case ZigbeeClusterLibrary::ClusterIdOtaUpgrade:
         return new ZigbeeClusterOta(m_network, m_node, this, direction, this);
diff --git a/libnymea-zigbee/zigbeenodeendpoint.h b/libnymea-zigbee/zigbeenodeendpoint.h
index 0d6d7bd..67b2eda 100644
--- a/libnymea-zigbee/zigbeenodeendpoint.h
+++ b/libnymea-zigbee/zigbeenodeendpoint.h
@@ -37,44 +37,6 @@
 // Import all implemented cluster types
 #include "zcl/zigbeecluster.h"
 
-#include "zcl/general/zigbeeclusterbasic.h"
-#include "zcl/general/zigbeeclusteronoff.h"
-#include "zcl/general/zigbeeclusteridentify.h"
-#include "zcl/general/zigbeeclusterlevelcontrol.h"
-#include "zcl/general/zigbeeclusterpowerconfiguration.h"
-#include "zcl/general/zigbeeclustergroups.h"
-#include "zcl/general/zigbeeclusterscenes.h"
-#include "zcl/general/zigbeeclusteranaloginput.h"
-#include "zcl/general/zigbeeclusteranalogoutput.h"
-#include "zcl/general/zigbeeclusteranalogvalue.h"
-#include "zcl/general/zigbeeclusterbinaryinput.h"
-#include "zcl/general/zigbeeclusterbinaryoutput.h"
-#include "zcl/general/zigbeeclusterbinaryvalue.h"
-#include "zcl/general/zigbeeclustermultistateinput.h"
-#include "zcl/general/zigbeeclustermultistateoutput.h"
-#include "zcl/general/zigbeeclustermultistatevalue.h"
-
-#include "zcl/closures/zigbeeclusterdoorlock.h"
-
-#include "zcl/measurement/zigbeeclusteroccupancysensing.h"
-#include "zcl/measurement/zigbeeclusterilluminancemeasurment.h"
-#include "zcl/measurement/zigbeeclustertemperaturemeasurement.h"
-#include "zcl/measurement/zigbeeclusterrelativehumiditymeasurement.h"
-#include "zcl/measurement/zigbeeclusterpressuremeasurement.h"
-#include "zcl/measurement/zigbeeclusterelectricalmeasurement.h"
-
-#include "zcl/lighting/zigbeeclustercolorcontrol.h"
-
-#include "zcl/security/zigbeeclusteriaszone.h"
-
-#include "zcl/ota/zigbeeclusterota.h"
-
-#include "zcl/hvac/zigbeeclusterthermostat.h"
-
-#include "zcl/smartenergy/zigbeeclustermetering.h"
-
-#include "zcl/manufacturerspecific/philips/zigbeeclustermanufacturerspecificphilips.h"
-
 class ZigbeeNode;
 class ZigbeeNetwork;