diff --git a/libnymea-zigbee/backends/deconz/interface/zigbeeinterfacedeconzreply.cpp b/libnymea-zigbee/backends/deconz/interface/zigbeeinterfacedeconzreply.cpp
index 66015d4..6561511 100644
--- a/libnymea-zigbee/backends/deconz/interface/zigbeeinterfacedeconzreply.cpp
+++ b/libnymea-zigbee/backends/deconz/interface/zigbeeinterfacedeconzreply.cpp
@@ -84,7 +84,7 @@ ZigbeeInterfaceDeconzReply::ZigbeeInterfaceDeconzReply(Deconz::Command command,
     m_timer(new QTimer(this)),
     m_command(command)
 {
-    m_timer->setInterval(5000);
+    m_timer->setInterval(10000);
     m_timer->setSingleShot(true);
     connect(m_timer, &QTimer::timeout, this, &ZigbeeInterfaceDeconzReply::onTimeout);
 }
diff --git a/libnymea-zigbee/backends/deconz/zigbeebridgecontrollerdeconz.cpp b/libnymea-zigbee/backends/deconz/zigbeebridgecontrollerdeconz.cpp
index d76dfd7..c236697 100644
--- a/libnymea-zigbee/backends/deconz/zigbeebridgecontrollerdeconz.cpp
+++ b/libnymea-zigbee/backends/deconz/zigbeebridgecontrollerdeconz.cpp
@@ -233,9 +233,13 @@ void ZigbeeBridgeControllerDeconz::sendNextRequest()
     if (m_currentReply)
         return;
 
-    //    // FIXME: If the controler request queue is full, wait until it's free again
-    //    if (!m_apsFreeSlotsAvailable)
-    //        return;
+    // If the controler request queue is full, wait until it's free again
+    if (!m_apsFreeSlotsAvailable)
+        return;
+
+    if (!m_available) {
+        return;
+    }
 
     // Get the next reply, set the sequence number, send the request data over the interface and start waiting
     m_currentReply = m_replyQueue.dequeue();
@@ -864,14 +868,15 @@ void ZigbeeBridgeControllerDeconz::processDeviceState(DeconzDeviceState deviceSt
     }
 
     if (m_apsFreeSlotsAvailable != deviceState.apsDataRequestFreeSlots) {
-        m_apsFreeSlotsAvailable = deviceState.apsDataRequestFreeSlots;
-        if (!m_apsFreeSlotsAvailable) {
+        if (!deviceState.apsDataRequestFreeSlots) {
             // Warn only if the network is up
             if (m_networkState == Deconz::NetworkStateConnected) {
                 qCWarning(dcZigbeeController()) << "The APS request table is full on the device. Cannot send requests until the queue gets processed on the controller.";
+                m_apsFreeSlotsAvailable = false;
             }
             return;
         } else {
+            m_apsFreeSlotsAvailable = true;
             qCDebug(dcZigbeeController()) << "The APS request table is free again. Sending the next request";
             sendNextRequest();
         }
@@ -1021,6 +1026,14 @@ void ZigbeeBridgeControllerDeconz::onInterfacePackageReceived(const QByteArray &
 
     // Check if this is the response to the current active reply
     if (m_currentReply && m_currentReply->sequenceNumber() == sequenceNumber && m_currentReply->command() == command) {
+        // If the controller is busy, let's try again once the device state reports free slots
+        if (status == Deconz::StatusCodeBusy) {
+            qCWarning(dcZigbeeController()) << "Controller busy. Rescheduling command.";
+            m_apsFreeSlotsAvailable = false;
+            m_replyQueue.prepend(m_currentReply);
+            m_currentReply = nullptr;
+            return;
+        }
         m_currentReply->m_responseData = data;
         m_currentReply->m_statusCode = status;
         emit m_currentReply->finished();
diff --git a/libnymea-zigbee/backends/deconz/zigbeenetworkdeconz.cpp b/libnymea-zigbee/backends/deconz/zigbeenetworkdeconz.cpp
index b3f511a..9342031 100644
--- a/libnymea-zigbee/backends/deconz/zigbeenetworkdeconz.cpp
+++ b/libnymea-zigbee/backends/deconz/zigbeenetworkdeconz.cpp
@@ -76,6 +76,14 @@ ZigbeeNetworkReply *ZigbeeNetworkDeconz::sendRequest(const ZigbeeNetworkRequest
         return reply;
     }
 
+    if (state() == ZigbeeNetwork::StateStarting) {
+        m_requestQueue.append(reply);
+        connect(reply, &ZigbeeNetworkReply::finished, this, [this, reply](){
+            m_requestQueue.removeAll(reply);
+        });
+        return reply;
+    }
+
     ZigbeeInterfaceDeconzReply *interfaceReply = m_controller->requestSendRequest(request);
     connect(interfaceReply, &ZigbeeInterfaceDeconzReply::finished, reply, [this, reply, interfaceReply](){
         if (interfaceReply->statusCode() != Deconz::StatusCodeSuccess) {
@@ -157,6 +165,25 @@ ZigbeeNetworkReply *ZigbeeNetworkDeconz::requestSetPermitJoin(quint16 shortAddre
     return sendRequest(request);
 }
 
+void ZigbeeNetworkDeconz::sendPendingRequests()
+{
+    while (!m_requestQueue.isEmpty()) {
+        ZigbeeNetworkReply *reply = m_requestQueue.takeFirst();
+
+        ZigbeeInterfaceDeconzReply *interfaceReply = m_controller->requestSendRequest(reply->request());
+        connect(interfaceReply, &ZigbeeInterfaceDeconzReply::finished, reply, [this, reply, interfaceReply](){
+            if (interfaceReply->statusCode() != Deconz::StatusCodeSuccess) {
+                qCWarning(dcZigbeeController()) << "Could not send request to controller. SQN:" << interfaceReply->sequenceNumber() << interfaceReply->statusCode();
+                finishNetworkReply(reply, ZigbeeNetworkReply::ErrorInterfaceError);
+                return;
+            }
+
+            // The request has been sent successfully to the device, start the timeout timer now
+            startWaitingReply(reply);
+        });
+    }
+}
+
 void ZigbeeNetworkDeconz::setCreateNetworkState(ZigbeeNetworkDeconz::CreateNetworkState state)
 {
     if (m_createState == state)
@@ -379,19 +406,21 @@ void ZigbeeNetworkDeconz::setCreateNetworkState(ZigbeeNetworkDeconz::CreateNetwo
 
             setState(StateRunning);
             setPermitJoining(0);
+            sendPendingRequests();
             return;
         }
 
+        m_initializing = false;
+        setState(StateRunning);
+        setPermitJoining(0);
+
         ZigbeeNode *coordinatorNode = createNode(m_controller->networkConfiguration().shortAddress, m_controller->networkConfiguration().ieeeAddress, this);
         m_coordinatorNode = coordinatorNode;
 
-        // Network creation done when coordinator node is initialized
         connect(coordinatorNode, &ZigbeeNode::stateChanged, this, [this, coordinatorNode](ZigbeeNode::State state){
             if (state == ZigbeeNode::StateInitialized) {
                 qCDebug(dcZigbeeNetwork()) << "Coordinator initialized successfully." << coordinatorNode;
-                m_initializing = false;
-                setState(StateRunning);
-                setPermitJoining(0);
+                sendPendingRequests();
                 return;
             }
         });
@@ -534,6 +563,7 @@ void ZigbeeNetworkDeconz::runNetworkInitProcess()
 
                                 qCDebug(dcZigbeeNetwork()) << "Set permit join configuration request finished" << reply->statusCode();
                                 setState(StateRunning);
+                                sendPendingRequests();
                             });
 
                         } else if (m_controller->networkState() == Deconz::NetworkStateOffline) {
diff --git a/libnymea-zigbee/backends/deconz/zigbeenetworkdeconz.h b/libnymea-zigbee/backends/deconz/zigbeenetworkdeconz.h
index 6a5b271..eb36fcc 100644
--- a/libnymea-zigbee/backends/deconz/zigbeenetworkdeconz.h
+++ b/libnymea-zigbee/backends/deconz/zigbeenetworkdeconz.h
@@ -68,6 +68,7 @@ private:
     QString m_protocolVersion;
     QString m_firmwareVersion;
 
+    QList<ZigbeeNetworkReply*> m_requestQueue;
     QHash<quint8, ZigbeeNetworkReply *> m_pendingReplies;
 
     QTimer *m_pollNetworkStateTimer = nullptr;
@@ -79,6 +80,8 @@ private:
 
     ZigbeeNetworkReply *requestSetPermitJoin(quint16 shortAddress = Zigbee::BroadcastAddressAllRouters, quint8 duration = 0xfe);
 
+    void sendPendingRequests();
+
 protected:
     void startNetworkInternally();