diff --git a/packages/node_modules/@node-red/nodes/core/network/10-mqtt.html b/packages/node_modules/@node-red/nodes/core/network/10-mqtt.html
index d67c6b2c6..20a873309 100644
--- a/packages/node_modules/@node-red/nodes/core/network/10-mqtt.html
+++ b/packages/node_modules/@node-red/nodes/core/network/10-mqtt.html
@@ -57,7 +57,6 @@
         width: 15px;
         height: 15px;
     }
-
 </style>
 
 <script type="text/html" data-template-name="mqtt in">
@@ -77,38 +76,40 @@
             <option value="2">2</option>
         </select>
     </div>
-    <div class="form-row">
-        <label for="node-input-userProperties"><i class="fa fa-tasks"></i> <span data-i18n="common.label.userProperties">User Properties</span></label>
+    <div class="form-row mqtt5">
+        <label for="node-input-userProperties"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.userProperties"></span></label>
         <input id="node-input-userPropertiesType" type="hidden">
-        <input type="text" id="node-input-userProperties" style="width: 70%;" data-i18n="[placeholder]common.label.userProperties" placeholder="User Properties">
+        <input type="text" id="node-input-userProperties" style="width: 70%;" data-i18n="[placeholder]mqtt.label.userProperties" placeholder="">
     </div>
-    <div class="form-row">
-        <label for="node-input-subscriptionIdentifier" class="mqtt-form-row-col1"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.subscriptionIdentifier">Subscription ID</span></label>
+    <div class="form-row mqtt5">
+        <label for="node-input-subscriptionIdentifier" class="mqtt-form-row-col1"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.subscriptionIdentifier"></span></label>
         <input type="number" min="0" max="268435455" id="node-input-subscriptionIdentifier" class="mqtt-form-row-col1" >
     </div> 
-    <div class="form-row mqtt-flags-row"> 
+    <div class="form-row mqtt-flags-row mqtt5"> 
         <label for="node-input-nl" ><i class="fa fa-flag"></i> <span data-i18n="mqtt.label.flags">Flags</span></label>
         <div class="mqtt-flags">
             <div class="mqtt-flag">
                 <label for="node-input-nl">
                     <input type="checkbox" id="node-input-nl">
-                    <span data-i18n="mqtt.label.nl">No local</span>
+                    <span data-i18n="mqtt.label.nl"></span>
                 </label>                
             </div>
             <div class="mqtt-flag">
                 <label for="node-input-rap">
                     <input type="checkbox" id="node-input-rap">
-                    <span data-i18n="mqtt.label.rap">Retain as Published</span>
-                </label>                
-            </div>
-            <div class="mqtt-flag">
-                <label for="node-input-rh">
-                    <input type="checkbox" id="node-input-rh">
-                    <span data-i18n="mqtt.label.rh">Retain Handling</span>
+                    <span data-i18n="mqtt.label.rap"></span>
                 </label>                
             </div>
         </div>
     </div> 
+    <div class="form-row mqtt5"> 
+        <label for="node-input-rh" ><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.rh"></span></label>
+        <select id="node-input-rh" style="width:70%;">
+            <option value="0" data-i18n="mqtt.label.rh0"></option>
+            <option value="1" data-i18n="mqtt.label.rh1"></option>
+            <option value="2" data-i18n="mqtt.label.rh2"></option>
+        </select>
+    </div> 
     <div class="form-row">
         <label for="node-input-datatype"><i class="fa fa-sign-out"></i> <span data-i18n="mqtt.label.output"></span></label>
         <select id="node-input-datatype" style="width:70%;">
@@ -133,13 +134,13 @@
             topic: {value:"",required:true,validate: RED.validators.regex(/^(#$|(\+|[^+#]*)(\/(\+|[^+#]*))*(\/(\+|#|[^+#]*))?$)/)},
             qos: {value: "2"},
             datatype: {value:"auto",required:true},
-            userPropertiesType: {value:"none"},
-            userProperties: {value:"userProperties"},
+            broker: {type:"mqtt-broker", required:true},
+            userPropertiesType: {value:"json"},
+            userProperties: {value:"{}"},
             subscriptionIdentifier: {value:0},
             nl: {value:false},
-            rap: {value:false},
+            rap: {value:true},
             rh: {value:false},
-            broker: {type:"mqtt-broker", required:true}
         },
         color:"#d8bfd8",
         inputs:0,
@@ -152,6 +153,15 @@
             return this.name?"node_label_italic":"";
         },
         oneditprepare: function() {
+            $("#node-input-broker").change(function(d){
+                var confNode = RED.nodes.node($("#node-input-broker").val());
+                var v5 = confNode && confNode.protocolVersion == "5";
+                if(v5) {
+                    $(".mqtt5").show();
+                } else {
+                    $(".mqtt5").hide();
+                }
+            });
             if (this.qos === undefined) {
                 $("#node-input-qos").val("2");
             }
@@ -159,8 +169,8 @@
                 $("#node-input-datatype").val("auto");
             }
             $("#node-input-userProperties").typedInput({
-                default: "none",
-                types:[{ value:"none", label: "None",  hasValue:false },'flow','global','json'],
+                default: "json",
+                types:['json','flow','global'],
                 typeField: $("#node-input-userPropertiesType")
             });
         }
@@ -193,46 +203,42 @@
             <option value="true" data-i18n="mqtt.true"></option>
         </select>
     </div>
-    <hr>
-    <div class="form-row">
-        <label for="node-input-userProperties"><i class="fa fa-tasks"></i> <span data-i18n="common.label.userProperties">User Properties</span></label>
-        <input id="node-input-userPropertiesType" type="hidden">
-        <input type="text" id="node-input-userProperties" style="width: 70%;" data-i18n="[placeholder]common.label.userProperties" placeholder="User Properties">
+    <div class="form-row mqtt5">
+        <label for="node-input-responseTopic"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.responseTopic"></span></label>
+        <input type="text" id="node-input-responseTopic" data-i18n="[placeholder]mqtt.label.responseTopic" placeholder="">
     </div>
-
-    <div class="form-row">
-        <label for="node-input-responseTopic"><i class="fa fa-tag"></i> <span data-i18n="common.label.responseTopic">Response topic</span></label>
-        <input type="text" id="node-input-responseTopic" data-i18n="[placeholder]common.label.responseTopic" placeholder="Response Topic">
-    </div>
-
-    <div class="form-row">
-        <label for="node-input-correlationData"><i class="fa fa-tag"></i> <span data-i18n="common.label.correlationData">correlation Data</span></label>
+    <div class="form-row mqtt5">
+        <label for="node-input-correlationData"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.correlationData"></span></label>
         <input id="node-input-correlationDataType" type="hidden">
-        <input type="text" id="node-input-correlationData" style="width: 70%;" data-i18n="[placeholder]common.label.correlationData" placeholder="correlation Data">
+        <input type="text" id="node-input-correlationData" style="width: 70%;" data-i18n="[placeholder]mqtt.label.correlationData" placeholder="">
+    </div>
+    <div class="form-row mqtt5">
+        <label for="node-input-userProperties"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.userProperties"></span></label>
+        <input id="node-input-userPropertiesType" type="hidden">
+        <input type="text" id="node-input-userProperties" style="width: 70%;" data-i18n="[placeholder]mqtt.label.userProperties" placeholder="">
+    </div>
+    <div class="form-row mqtt5">
+        <label for="node-input-contentType"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.contentType"></span></label>
+        <input type="text" id="node-input-contentType" data-i18n="[placeholder]mqtt.label.contentType" placeholder="">
     </div>
 
-    <div class="form-row">
-        <label for="node-input-contentType"><i class="fa fa-tag"></i> <span data-i18n="common.label.contentType">Content Type</span></label>
-        <input type="text" id="node-input-contentType" data-i18n="[placeholder]common.label.contentType" placeholder="Content Type">
-    </div>
-
-    <div class="form-row mqtt-form-row-cols2">
-        <label for="node-input-messageExpiryInterval" class="mqtt-form-row-col1"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.messageExpiryInterval">Expiry (secs)</span></label>
+    <div class="form-row mqtt-form-row-cols2 mqtt5">
+        <label for="node-input-messageExpiryInterval" class="mqtt-form-row-col1"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.messageExpiryInterval"></span></label>
         <input type="number" min="0" id="node-input-messageExpiryInterval" class="mqtt-form-row-col1" >
         
         <label for="node-input-topicAlias" class="mqtt-form-row-col2"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.topicAlias">Alias</span></label>
         <input type="number" min="0" id="node-input-topicAlias" class="mqtt-form-row-col2" >
     </div> 
 
-    <div class="form-row mqtt-form-row-cols2">
-        <label for="node-input-subscriptionIdentifier" class="mqtt-form-row-col1"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.subscriptionIdentifier">Subscription ID</span></label>
+    <div class="form-row mqtt-form-row-cols2 mqtt5">
+        <label for="node-input-subscriptionIdentifier" class="mqtt-form-row-col1"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.subscriptionIdentifier"></span></label>
         <input type="number" min="0" max="268435455" id="node-input-subscriptionIdentifier" class="mqtt-form-row-col1" >
         
-        <label for="node-input-payloadFormatIndicator" class="mqtt-form-row-col2"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.payloadFormatIndicator">Format</span></label>
+        <label for="node-input-payloadFormatIndicator" class="mqtt-form-row-col2"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.payloadFormatIndicator"></span></label>
         <select id="node-input-payloadFormatIndicator" class="mqtt-form-row-col2" >
             <option value=""></option>
-            <option value="false" data-i18n="mqtt.payloadFormatIndicatorFalse">unspecified bytes (Default)</option>
-            <option value="true" data-i18n="mqtt.payloadFormatIndicatorTrue">UTF-8 encoded payload</option>
+            <option value="false" data-i18n="mqtt.label.payloadFormatIndicatorFalse"></option>
+            <option value="true" data-i18n="mqtt.label.payloadFormatIndicatorTrue"></option>
         </select>
     </div> 
 
@@ -254,9 +260,9 @@
             responseTopic: {value:""},
             contentType: {value:""},
             userProperties: {value:'userProperties'},
-            userPropertiesType: {value:'none'},
+            userPropertiesType: {value:'msg'},
             correlationData: {value:'correlationData'},
-            correlationDataType: {value:'none'},
+            correlationDataType: {value:'msg'},
             topicAlias: {value:0},
             messageExpiryInterval: {value:0},
             payloadFormatIndicator: {value:false},
@@ -272,14 +278,23 @@
             return this.name||this.topic||"mqtt";
         },
         oneditprepare: function() {
+            $("#node-input-broker").change(function(d){
+                var confNode = RED.nodes.node($("#node-input-broker").val());
+                var v5 = confNode && confNode.protocolVersion == "5";
+                if(v5) {
+                    $(".mqtt5").show();
+                } else {
+                    $(".mqtt5").hide();
+                }
+            });            
             $("#node-input-correlationData").typedInput({
                 default: "none",
-                types:[{ value:"none", label: "None",  hasValue:false },'msg','flow','global','bin'],
+                types:[{ value:"none", label: "None",  hasValue:false },'bin','msg','flow','global'],
                 typeField: $("#node-input-correlationDataType")
             });
             $("#node-input-userProperties").typedInput({
-                default: "none",
-                types:[{ value:"none", label: "None",  hasValue:false },'msg','flow','global','json'],
+                default: "msg",
+                types:['msg','flow','global','json'],
                 typeField: $("#node-input-userPropertiesType")
             });
         },
@@ -319,8 +334,17 @@
             <div class="form-row">
                 <label for="node-config-input-keepalive" style="width: auto"><i class="fa fa-clock-o"></i> <span data-i18n="mqtt.label.keepalive"></span></label>
                 <input type="text" id="node-config-input-keepalive" style="width: 50px">
-                <input type="checkbox" id="node-config-input-cleansession" style="margin-left: 30px; height: 1em;display: inline-block; width: auto; vertical-align: middle;">
-                <label for="node-config-input-cleansession" style="width: auto;" data-i18n="mqtt.label.cleansession"></label>
+            </div>
+            <div class="form-row mqtt-form-row-cols2">
+                <label for="node-config-input-cleansession" class="mqtt-form-row-col1"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.session"></span>Session</label>
+                <div class="mqtt-flag mqtt-form-row-col1" style="display: inline-block;width: calc(35% - 75px);">
+                    <label for="node-config-input-cleansession" style="display: block; padding-left: 15px; text-indent: -15px;">
+                        <input type="checkbox" id="node-config-input-cleansession" style="position: relative;vertical-align: bottom; top: -2px; width: 15px;height: 15px;">
+                        <span data-i18n="mqtt.label.cleansession"></span>
+                    </label>
+                </div>
+                <label for="node-config-input-sessionExpiryInterval" class="mqtt-form-row-col2 mqtt5 sessionExpiryInterval"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.sessionExpiryInterval"></span></label>
+                <input type="number" min="0" id="node-config-input-sessionExpiryInterval" class="mqtt-form-row-col2 mqtt5 sessionExpiryInterval" >
             </div>
             <div class="form-row">
                 <label for="node-config-input-protocolVersion"><i class="fa fa-cog"></i> <span data-i18n="mqtt.label.protocolVersion"></span></label>
@@ -329,20 +353,23 @@
                     <option value="4" data-i18n="mqtt.label.protocolVersion4"></option>
                     <option value="5" data-i18n="mqtt.label.protocolVersion5"></option>
                 </select>
-            </div>
-            <div class="form-row mqtt-form-row-cols2">
-                <label for="node-config-input-sessionExpiryInterval" class="mqtt-form-row-col1"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.sessionExpiryInterval">Session Exp</span></label>
-                <input type="number" min="0" id="node-config-input-sessionExpiryInterval" class="mqtt-form-row-col1" >
-                
-                <label for="node-config-input-topicAliasMaximum" class="mqtt-form-row-col2"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.topicAliasMaximum">Alias Max</span></label>
-                <input type="number" min="0" id="node-config-input-topicAliasMaximum" class="mqtt-form-row-col2" >
+            </div>            
+            <div class="form-row mqtt5">
+                <label for="node-config-input-userProperties"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.userProperties"></span></label>
+                <input id="node-config-input-userPropertiesType" type="hidden">
+                <input type="number" id="node-config-input-userProperties" style="width: 70%;" data-i18n="[placeholder]mqtt.label.userProperties" placeholder="">
+            </div>            
+            <div class="form-row mqtt5">
+                <label for="node-config-input-topicAliasMaximum"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.topicAliasMaximum"></span></label>
+                <input type="number" min="0" id="node-config-input-topicAliasMaximum">
             </div> 
-            <div class="form-row mqtt-form-row-cols2">
-                <label for="node-config-input-maximumPacketSize" class="mqtt-form-row-col1"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.maximumPacketSize">Max Packet Size</span></label>
-                <input type="number" min="0" id="node-config-input-maximumPacketSize" class="mqtt-form-row-col1" >
-                
-                <label for="node-config-input-receiveMaximum" class="mqtt-form-row-col2"><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.receiveMaximum">Receive Max</span></label>
-                <input type="number" min="0" id="node-config-input-receiveMaximum" class="mqtt-form-row-col2" >
+            <div class="form-row mqtt5">
+                <label for="node-config-input-maximumPacketSize" ><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.maximumPacketSize"></span></label>
+                <input type="number" min="0" id="node-config-input-maximumPacketSize">
+            </div> 
+            <div class="form-row mqtt5">
+                <label for="node-config-input-receiveMaximum" ><i class="fa fa-tag"></i> <span data-i18n="mqtt.label.receiveMaximum"></span></label>
+                <input type="number" min="0" id="node-config-input-receiveMaximum">
             </div> 
         </div>
         <div id="mqtt-broker-tab-security" style="display:none">
@@ -475,7 +502,9 @@
             sessionExpiryInterval: {value:0},
             topicAliasMaximum: {value:0},
             maximumPacketSize: {value:0},
-            receiveMaximum: {value:0}
+            receiveMaximum: {value:0},
+            userPropertiesType: {value:"json"},
+            userProperties: {value:"{}"},
         },
         credentials: {
             user: {type:"text"},
@@ -560,8 +589,29 @@
             if (typeof this.protocolVersion === 'undefined') {
                 this.protocolVersion = 4;
             }
-            console.log("setting protocolVersion", this.protocolVersion)
+            function updateSessionExpiryIntervalVisibility() {
+                var hide = ($("#node-config-input-cleansession").is(":checked") || $("#node-config-input-protocolVersion").val() != "5");
+                if(hide) {
+                    $(".sessionExpiryInterval").hide();
+                } else {
+                    $(".sessionExpiryInterval").show();
+                }
+            }            
+            $("#node-config-input-protocolVersion").change(function(){
+                var v5 = $("#node-config-input-protocolVersion").val() == "5";
+                if(v5) {
+                    $(".mqtt5").show();
+                } else {
+                    $(".mqtt5").hide();
+                }
+                updateSessionExpiryIntervalVisibility();
+            });
             $("#node-config-input-protocolVersion").val(this.protocolVersion);
+            $("#node-config-input-userProperties").typedInput({
+                default: "json",
+                types:['json','flow','global'],
+                typeField: $("#node-config-input-userPropertiesType")
+            });            
             if (typeof this.keepalive === 'undefined') {
                 this.keepalive = 15;
                 $("#node-config-input-keepalive").val(this.keepalive);
@@ -597,6 +647,7 @@
                 } else {
                     $("#node-config-input-clientid").attr("placeholder",node._("mqtt.placeholder.clientid-nonclean"));
                 }
+                updateSessionExpiryIntervalVisibility();
                 $("#node-config-input-clientid").change();
             }
             setTimeout(updateClientId,0);
diff --git a/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js b/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js
index 37841770a..bcc458d52 100644
--- a/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js
+++ b/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js
@@ -129,14 +129,22 @@ module.exports = function(RED) {
     }
 
     /**
-     * Helper function for copying the MQTT v5 correlationData object (parameter1) to the properties object (parameter2). 
-     * NOTE: if srcCorrelationData is not a buffer, correlationData will NOT be added to the properties object
-     * @param {object} srcCorrelationData An buffer containing correlationData
-     * @param {object} properties A properties object in which correlationData will be copied to
+     * Helper function for copying the MQTT v5 buffer type properties 
+     * NOTE: if src[propName] is not a buffer, dst[propName] will NOT be assigned a value (unless def is set)
+     * @param {object} src Source object containing properties
+     * @param {object} dst Destination object to set/add properties
+     * @param {string} propName The property name to set in the Destination object
+     * @param {boolean} [def] An optional default to set in the destination object if prop is NOT present in the Source object
      */
-    function setCorrelationData(srcCorrelationData, properties) {
-        if (srcCorrelationData && typeof  Buffer.isBuffer(srcCorrelationData)) { 
-            properties.correlationData = Buffer.from(srcCorrelationData);
+    function setBufferProp(src, dst, propName, def) {
+        if(!dst) return;
+        if (src && dst) {
+            var buf = src[propName];
+            if (buf && typeof  Buffer.isBuffer(buf)) { 
+                dst[propName] = Buffer.from(buf);
+            }
+        } else {
+            if(def != undefined) dst[propName] = def;
         }
     }
 
@@ -157,7 +165,10 @@ module.exports = function(RED) {
         this.sessionExpiryInterval = n.sessionExpiryInterval;
         this.topicAliasMaximum = n.topicAliasMaximum;
         this.maximumPacketSize = n.maximumPacketSize;
-        this.receiveMaximum = n.receiveMaximum;   
+        this.receiveMaximum = n.receiveMaximum;
+        this.userProperties = n.userProperties;//https://docs.oasis-open.org/mqtt/mqtt/v5.0/os/mqtt-v5.0-os.html#_Toc3901116
+        this.userPropertiesType = n.userPropertiesType;
+
         // Config node state
         this.brokerurl = "";
         this.connected = false;
@@ -172,7 +183,8 @@ module.exports = function(RED) {
                 topic: n.birthTopic,
                 payload: n.birthPayload || "",
                 qos: Number(n.birthQos||0),
-                retain: n.birthRetain=="true"|| n.birthRetain===true
+                retain: n.birthRetain=="true"|| n.birthRetain===true,
+                //TODO: add payloadFormatIndicator, messageExpiryInterval, contentType, responseTopic, correlationData, userProperties
             };
         }
 
@@ -181,7 +193,8 @@ module.exports = function(RED) {
                 topic: n.closeTopic,
                 payload: n.closePayload || "",
                 qos: Number(n.closeQos||0),
-                retain: n.closeRetain=="true"|| n.closeRetain===true
+                retain: n.closeRetain=="true"|| n.closeRetain===true,
+                //TODO: add payloadFormatIndicator, messageExpiryInterval, contentType, responseTopic, correlationData, userProperties
             };
         }
 
@@ -198,9 +211,6 @@ module.exports = function(RED) {
         if (typeof this.usews === 'undefined') {
             this.usews = false;
         }
-        if (typeof this.compatmode === 'undefined') {
-            this.compatmode = false;
-        }
         if (typeof this.verifyservercert === 'undefined') {
             this.verifyservercert = false;
         }
@@ -292,11 +302,16 @@ module.exports = function(RED) {
             this.options.properties = {};
             this.options.properties.requestResponseInformation = true;
             this.options.properties.requestProblemInformation = true;
+            if(this.userProperties) {
+                let userProperties = RED.util.evaluateNodeProperty(this.userProperties, this.userPropertiesType, this, {});
+                setUserProperties(userProperties, this.options.properties);
+            }
             setIntProp(this,this.options.properties,"sessionExpiryInterval", 0);
             setIntProp(this,this.options.properties,"topicAliasMaximum", 0);
             setIntProp(this,this.options.properties,"maximumPacketSize", 0);
-            setIntProp(this,this.options.properties,"receiveMaximum", 0);      
-            this.options.properties.userProperties = {"node-red":"v1.3"};//test
+            setIntProp(this,this.options.properties,"receiveMaximum", 0);
+            setStrProp(this,this.options.properties,"authenticationMethod"); //TODO: authenticationMethod: the name of the authentication method used for extended authentication string,
+            setBufferProp(this,this.options.properties,"authenticationData"); //TODO: authenticationData: Binary Data containing authentication data
         }
         if (this.usetls && n.tls) {
             var tlsNode = RED.nodes.getNode(n.tls);
@@ -318,7 +333,8 @@ module.exports = function(RED) {
                 topic: n.willTopic,
                 payload: n.willPayload || "",
                 qos: Number(n.willQos||0),
-                retain: n.willRetain=="true"|| n.willRetain===true
+                retain: n.willRetain=="true"|| n.willRetain===true,
+                //TODO: add willDelayInterval, payloadFormatIndicator, messageExpiryInterval, contentType, responseTopic, correlationData, userProperties
             };
         }
 
@@ -354,25 +370,34 @@ module.exports = function(RED) {
                 node.connecting = true;
                 try {
                     node.serverProperties = {};
-                    debug("MQTT: ⬆️ mqtt.connect(node.brokerurl ,node.options)", node.brokerurl, node.options);
+                    // debug("MQTT: ⬆️ mqtt.connect(node.brokerurl ,node.options)", node.brokerurl, node.options);
                     node.client = mqtt.connect(node.brokerurl ,node.options);
                     node.client.setMaxListeners(0);
                     // Register successful connect or reconnect handler
-                    node.client.on('connect', function () {
+                    node.client.on('connect', function (connack) {
                         node.connecting = false;
                         node.connected = true;
                         node.log(RED._("mqtt.state.connected",{broker:(node.clientid?node.clientid+"@":"")+node.brokerurl}));
-                        if(node.options.protocolVersion == 5 && arguments && arguments.length && arguments[0].hasOwnProperty("properties")) {
+                        if(node.options.protocolVersion == 5 && connack && connack.hasOwnProperty("properties")) {
                             let mqttServerV5Properties = arguments[0].properties;
                             if(mqttServerV5Properties) {
+                                //node.serverProperties = mqttServerV5Properties; //assign all props, below, square them up.
                                 setIntProp(mqttServerV5Properties, node.serverProperties, "topicAliasMaximum", 1);
                                 setIntProp(mqttServerV5Properties, node.serverProperties, "receiveMaximum", 0);
                                 setIntProp(mqttServerV5Properties, node.serverProperties, "sessionExpiryInterval", 0, 0xFFFFFFFF);
-                                setIntProp(mqttServerV5Properties, node.serverProperties, "maximumPacketSize", 22);
+                                setIntProp(mqttServerV5Properties, node.serverProperties, "maximumQoS", 0, 2);
+                                setBoolProp(mqttServerV5Properties, node.serverProperties, "retainAvailable");
+                                setBoolProp(mqttServerV5Properties, node.serverProperties, "wildcardSubscriptionAvailable");
+                                setBoolProp(mqttServerV5Properties, node.serverProperties, "subscriptionIdentifiersAvailable");
+                                setBoolProp(mqttServerV5Properties, node.serverProperties, "sharedSubscriptionAvailable");
+                                setIntProp(mqttServerV5Properties, node.serverProperties, "maximumPacketSize", 0); 
+                                setIntProp(mqttServerV5Properties, node.serverProperties, "serverKeepAlive"); 
+                                setStrProp(mqttServerV5Properties, node.serverProperties, "responseInformation"); 
+                                setStrProp(mqttServerV5Properties, node.serverProperties, "serverReference"); 
+                                setStrProp(mqttServerV5Properties, node.serverProperties, "assignedClientIdentifier"); 
+                                setStrProp(mqttServerV5Properties, node.serverProperties, "reasonString"); 
                                 setUserProperties(mqttServerV5Properties, node.serverProperties);
-                                node.serverProperties.requestResponseInformation = mqttServerV5Properties.requestResponseInformation;
-                                node.serverProperties.requestProblemInformation = mqttServerV5Properties.requestProblemInformation;
-                                debug("MQTT: ⬆️ node.client.on('connect', cb) --> node.serverProperties", node.serverProperties );
+                                debug("MQTTBrokerNode: ⬆ CONNECTED. node.serverProperties ==> ", node.serverProperties );
                             }
                         }
                         for (var id in node.users) {
@@ -393,11 +418,12 @@ module.exports = function(RED) {
                                     if (node.subscriptions[s].hasOwnProperty(r)) {
                                         qos = Math.max(qos,node.subscriptions[s][r].qos);
                                         _options = node.subscriptions[s][r].options;
-                                        debug(`MQTT: Adding handler for ${r} to ${s}`);
+                                        debug(`MQTTBrokerNode:${node.id}: Re-subscribe - registering handler ref ${r} for ${s} `);
                                         node.client.on('message',node.subscriptions[s][r].handler);
                                     }
                                 }
                                 _options.qos = _options.qos || qos;
+                                debug(`MQTTBrokerNode:${node.id}: Re-subscribe - subscribing to topic '${topic}'`, _options);
                                 node.client.subscribe(topic, _options);
                             }
                         }
@@ -413,9 +439,17 @@ module.exports = function(RED) {
                                 node.users[id].status({fill:"yellow",shape:"ring",text:"node-red:common.status.connecting"});
                             }
                         }
-                    })
+                    });
+                    node.client.on("disconnect", function(packet) {
+                        //Emitted after receiving disconnect packet from broker. MQTT 5.0 feature.
+                        console.log('MQTTBrokerNode disconnect', packet)
+                        var rc = packet && packet.properties && packet.properties.reasonString;
+                        var rc = packet && packet.properties && packet.reasonCode;
+                        //TODO: what to do with this event? Anything necessary?
+                    });
                     // Register disconnect handlers
                     node.client.on('close', function () {
+                        console.log('MQTTBrokerNode closed', arguments)
                         if (node.connected) {
                             node.connected = false;
                             node.log(RED._("mqtt.state.disconnected",{broker:(node.clientid?node.clientid+"@":"")+node.brokerurl}));
@@ -431,7 +465,9 @@ module.exports = function(RED) {
 
                     // Register connect error handler
                     // The client's own reconnect logic will take care of errors
-                    node.client.on('error', function (error) {});
+                    node.client.on('error', function (error) {
+                        console.log('MQTTBrokerNode errored', error)
+                    });
                 }catch(err) {
                     console.log(err);
                 }
@@ -454,17 +490,22 @@ module.exports = function(RED) {
                 qos:qos,
                 options:options,
                 handler:function(mtopic,mpayload, mpacket) {
-                    if (matchTopic(topic,mtopic)) {
+                    debug(`MQTTBrokerNode:${node.id}: this.subscribe.handler - attempting to match '${topic}' to '${mtopic}' `, mpacket);
+                    if(mpacket.properties && options.properties && mpacket.properties.subscriptionIdentifier && options.properties.subscriptionIdentifier && (mpacket.properties.subscriptionIdentifier !== options.properties.subscriptionIdentifier) ) {
+                        //do nothing as subscriptionIdentifier does not match
+                        debug(`MQTTBrokerNode:${node.id}: > no match - this nodes subID (${options.properties.subscriptionIdentifier}) !== packet subID (${mpacket.properties.subscriptionIdentifier})`);
+                    } else if (matchTopic(topic,mtopic)) {
+                        debug(`MQTTBrokerNode:${node.id}: >  MATCHED '${topic}' to '${mtopic}' - performing callback`);
                         callback(mtopic,mpayload, mpacket);
-                    }
+                    } else 
+                        debug(`MQTTBrokerNode:${node.id}: > no match / no callback`);
                 },
                 ref: ref
             };
             node.subscriptions[topic][ref] = sub;
             if (node.connected) {
+                debug(`MQTTBrokerNode:${node.id}: this.subscribe - registering handler ref ${ref} for ${topic} and subscribing`, options);
                 node.client.on('message',sub.handler);
-                // var options = {};
-                // options.qos = qos;
                 node.client.subscribe(topic, options);
             }
         };
@@ -472,20 +513,30 @@ module.exports = function(RED) {
         this.unsubscribe = function (topic, ref, removed) {
             ref = ref||0;
             var sub = node.subscriptions[topic];
+            var _debug = `MQTTBrokerNode ${node.id}: unsubscribe for topic ${topic} called... ` ;
             if (sub) {
+                _debug += "sub found. "
                 if (sub[ref]) {
+                    // debug(`MQTTBrokerNode:${node.id}: this.unsubscribe - removing handler ref ${ref} for ${topic} `);
+                    _debug += `removing handler ref ${ref} for ${topic}. `
                     node.client.removeListener('message',sub[ref].handler);
                     delete sub[ref];
                 }
-                if (removed) {
+                //if (removed) {
                     if (Object.keys(sub).length === 0) {
                         delete node.subscriptions[topic];
                         if (node.connected) {
+                            _debug += `calling client.unsubscribe to remove topic ${topic}`
+                            // debug(`MQTTBrokerNode:${node.id}: this.unsubscribe - calling client.unsubscribe to remove topic ${topic} `);
                             node.client.unsubscribe(topic);
                         }
                     }
-                }
+                //}
+            } else {
+                _debug += "sub not found! "
             }
+            debug(_debug);
+
         };
 
         this.publish = function (msg,done) {
@@ -513,10 +564,11 @@ module.exports = function(RED) {
                     setIntProp(msg, options.properties, "messageExpiryInterval", 0); 
                     setBoolProp(msg, options.properties, "payloadFormatIndicator"); 
                     setUserProperties(msg.userProperties, options.properties);
-                    setCorrelationData(msg.correlationData, options.properties);
+                    setBufferProp(msg, options.properties, "correlationData");
                 }
-                debug("MQTT: ➡️➡️ node.client.publish",msg,options);
+                debug(`MQTTBrokerNode:${node.id}: publish - sending payload to ${msg.topic ? msg.topic : (msg.topicAlias ? 'topicAlias-'+msg.topicAlias : '???') } `, options);
                 node.client.publish(msg.topic, msg.payload, options, function(err) {
+                    if(err) node.error(err,msg);//catch errors
                     done && done();
                     return
                 });
@@ -578,29 +630,23 @@ module.exports = function(RED) {
             this.status({fill:"red",shape:"ring",text:"node-red:common.status.disconnected"});
             if (this.topic) {
                 node.brokerConn.register(this);
-                let options = {
-                    qos: this.qos
-                }
+                let options = { qos: this.qos };
                 if(v5) {
                     options.properties = {};
-                    if(node.userProperties && node.userPropertiesType !== "none") {
+                    if(node.userProperties) {
                         let userProperties = RED.util.evaluateNodeProperty(node.userProperties, node.userPropertiesType, node, {});
-                        if(userProperties) options.properties.userProperties = userProperties;
-                    }
-                    if(node.subscriptionIdentifier) {
-                        let sid = parseInt(node.subscriptionIdentifier);
-                        if(sid >= 0 && !isNaN(sid) ) options.properties.subscriptionIdentifier = sid;//must not be sent if zero
+                        setUserProperties(userProperties, options.properties);
                     }
+                    setIntProp(node,options.properties,"subscriptionIdentifier", 1);
+                    setIntProp(node, options, "rh");
                     if(node.nl === "true" || node.nl === true) options.nl = true;
-                    if(node.nl === "false" || node.nl === false) options.nl = false;
+                    else if(node.nl === "false" || node.nl === false) options.nl = false;
                     if(node.rap === "true" || node.rap === true) options.rap = true;
-                    if(node.rap === "false" || node.rap === false) options.rap = false;
-                    if(node.rh === "true" || node.rh === true || node.rh == 1) options.rh = 1;
-                    if(node.rh === "false" || node.rh === false || node.rh == 0) options.rh = 0;
+                    else if(node.rap === "false" || node.rap === false) options.rap = false;
                 }
-                debug("MQTT: ⬅️⬅️ this.brokerConn.subscribe",this.topic,options);
+                // debug("MQTT: ⬅️⬅️ this.brokerConn.subscribe",this.topic,options);
                 this.brokerConn.subscribe(this.topic,options,function(topic,payload,packet) {
-                    debug("MQTT: ⬅️⬅️ ON this.brokerConn.subscribe",topic,payload,packet);
+                    debug(`MQTTInNode:${node.id}: Broker sent ${topic}, datatype ${node.datatype}`, packet);
                     if (node.datatype === "buffer") {
                         // payload = payload;
                     } else if (node.datatype === "base64") {
@@ -622,17 +668,17 @@ module.exports = function(RED) {
                         //msg.properties = packet.properties;
                         setStrProp(packet.properties, msg, "responseTopic");
                         setStrProp(packet.properties, msg, "contentType");                    
-                        setIntProp(packet.properties, msg, "topicAlias", 1, node.serverProperties.topicAliasMaximum || 0);
+                        setIntProp(packet.properties, msg, "topicAlias", 1, node.brokerConn.serverProperties.topicAliasMaximum || 0);
                         setIntProp(packet.properties, msg, "subscriptionIdentifier", 1, 268435455);
                         setIntProp(packet.properties, msg, "messageExpiryInterval", 0); 
                         setBoolProp(packet.properties, msg, "payloadFormatIndicator"); 
-                        setUserProperties(packet.properties.userProperties, options.properties);
-                        setCorrelationData(packet.properties.correlationData, options.properties);                   
+                        setStrProp(packet.properties, msg, "reasonString"); 
+                        setUserProperties(packet.properties.userProperties, msg);
+                        setBufferProp(packet.properties, msg, "correlationData");
                     }
                     if ((node.brokerConn.broker === "localhost")||(node.brokerConn.broker === "127.0.0.1")) {
                         msg._topic = topic;
                     }
-                    debug("MQTT: ⬅️⬅️ node.send",msg);
                     node.send(msg);
                 }, this.id);
                 if (this.brokerConn.connected) {
@@ -688,9 +734,10 @@ module.exports = function(RED) {
                 msg.qos = Number(node.qos || msg.qos || 0);
                 msg.retain = node.retain || msg.retain || false;
                 msg.retain = ((msg.retain === true) || (msg.retain === "true")) || false;
+                let msgPropOverride = function(propName) { if(node[propName]) { msg[propName] = node[propName]; } }
+                msgPropOverride("topic");
                 if(v5) {
-                    //TODO: contain all v5 props in an object?
-                    if(node.userProperties && node.userPropertiesType !== "none") {
+                    if(node.userProperties) {
                         let userProperties = RED.util.evaluateNodeProperty(node.userProperties, node.userPropertiesType, node, msg);
                         if(userProperties) msg.userProperties = userProperties;
                     }
@@ -698,14 +745,16 @@ module.exports = function(RED) {
                         let correlationData = RED.util.evaluateNodeProperty(node.correlationData, node.correlationDataType, node, msg);
                         if(correlationData) msg.correlationData = correlationData;
                     }
-                    var msgPropOverride = function(propName) { if(node[propName]) { msg[propName] = node[propName]; } }
                     msgPropOverride("responseTopic");
                     msgPropOverride("contentType");
                     msgPropOverride("topicAlias");
                     msgPropOverride("messageExpiryInterval");
                     msgPropOverride("payloadFormatIndicator");
                     msgPropOverride("subscriptionIdentifier");
-                    msgPropOverride("topic");
+                    setIntProp(msg,msg,"topicAlias");
+                    setIntProp(msg,msg,"messageExpiryInterval");
+                    setBoolProp(msg,msg,"payloadFormatIndicator");
+                    setIntProp(msg,msg,"subscriptionIdentifier");
                 }
                 if ( msg.hasOwnProperty("payload")) {
                     let topicOK = msg.hasOwnProperty("topic") && (typeof msg.topic === "string") && (msg.topic !== "");
@@ -714,7 +763,12 @@ module.exports = function(RED) {
                         msg.topic = "";//must be empty string?
                     }
                     if (topicOK) { // topic must exist
-                        this.brokerConn.publish(msg, done);  // send the message
+                        debug(`MQTTOutNode:${node.id}: sending msg to ${msg.topic}`, msg);
+                        this.brokerConn.publish(msg, function(){
+                            let args = arguments;
+                            let l = args.length;
+                            done();
+                        });  // send the message
                     } else {
                         node.warn(RED._("mqtt.errors.invalid-topic"));
                         done();
diff --git a/packages/node_modules/@node-red/nodes/locales/en-US/messages.json b/packages/node_modules/@node-red/nodes/locales/en-US/messages.json
index 794d424b7..dd23eb133 100755
--- a/packages/node_modules/@node-red/nodes/locales/en-US/messages.json
+++ b/packages/node_modules/@node-red/nodes/locales/en-US/messages.json
@@ -350,16 +350,37 @@
             "retain": "Retain",
             "clientid": "Client ID",
             "port": "Port",
-            "keepalive": "Keep alive time (s)",
+            "keepalive": "Keepalive time(s)",
             "cleansession": "Use clean session",
             "use-tls": "Enable secure (SSL/TLS) connection",
             "tls-config":"TLS Configuration",
             "verify-server-cert":"Verify server certificate",
             "compatmode": "Use legacy MQTT 3.1 support",
-            "protocolVersion": "Version",
-            "protocolVersion3": "MQTT Protocol v3.1 (legacy)",
-            "protocolVersion4": "MQTT Protocol v3.1.1",
-            "protocolVersion5": "MQTT Protocol v5"
+            "userProperties": "User Properties",
+            "subscriptionIdentifier": "Subscription ID",
+            "flags": "Flags",
+            "nl": "No Local",
+            "rap": "Retain as Published",
+            "rh": "Retain Handling",
+            "rh0": "0, Always send retained messages",
+            "rh1": "1, Send retained messages for new subscription",
+            "rh2": "2, Never send retained messages",
+            "responseTopic": "Response topic",
+            "contentType": "Content Type",
+            "correlationData": "Correlation Data",
+            "messageExpiryInterval": "Expiry (secs)",
+            "topicAlias": "Alias",
+            "payloadFormatIndicator": "Format",
+            "payloadFormatIndicatorFalse": "unspecified bytes (Default)",
+            "payloadFormatIndicatorTrue": "UTF-8 encoded payload",
+            "protocolVersion": "Protocol Version",
+            "protocolVersion3": "MQTT V3.1 (legacy)",
+            "protocolVersion4": "MQTT V3.1.1",
+            "protocolVersion5": "MQTT V5",
+            "sessionExpiryInterval": "Expiry(s)",
+            "topicAliasMaximum": "Alias Max",
+            "maximumPacketSize": "Max Packet Size",
+            "receiveMaximum": "Receive Max"
         },
         "sections-label":{
             "birth-message": "Message sent on connection (birth message)",
@@ -967,4 +988,4 @@
         "unexpected" : "unexpected mode",
         "no-parts" : "no parts property in message"
     }
-}
+} 
\ No newline at end of file