diff --git a/3rdparty/RibbonUI b/3rdparty/RibbonUI
index d8b4b10..aa36045 160000
--- a/3rdparty/RibbonUI
+++ b/3rdparty/RibbonUI
@@ -1 +1 @@
-Subproject commit d8b4b1070c291680946f6af7f3783379fe9d52e4
+Subproject commit aa3604579b8864efe9e777c7dec96209d7b8ee72
diff --git a/app_source/dlln3x/DLLN3X.cpp b/app_source/dlln3x/DLLN3X.cpp
index b2246f7..ba9cda5 100644
--- a/app_source/dlln3x/DLLN3X.cpp
+++ b/app_source/dlln3x/DLLN3X.cpp
@@ -62,7 +62,7 @@ bool DLLN3X::send(ZigbeeFrame zf)
 {
     bool status = false;
     uint8_t len = zf.size();
-    if (zf.getSrcPort() < 0x80 || (len + 4) > 63)
+    if (zf.getSrcPort() < 0x80 || len > 66)
         return false;
     status = _DSerial->write((char *)zf.data(),len);
     status = _DSerial->flush();
diff --git a/app_source/qml/components/RibbonMessageListView.qml b/app_source/qml/components/RibbonMessageListView.qml
index b0f5fdc..874a6cf 100644
--- a/app_source/qml/components/RibbonMessageListView.qml
+++ b/app_source/qml/components/RibbonMessageListView.qml
@@ -11,12 +11,31 @@ RibbonView{
     }
     spacing: 0
 
+    property int max_msg_num: 10
     property alias delegate: message_list.delegate
     property alias message_model: message_model
     property alias view: message_list
 
     ListModel{
         id: message_model
+        property int begin_index: 0
+        property int end_index: 0
+        onCountChanged: {
+            if (end_index == count - 2 || begin_index == end_index)
+            {
+                while(show_model.count > max_msg_num)
+                {
+                    show_model.remove(0)
+                    begin_index++
+                }
+                show_model.append(message_model.get(count - 1))
+                end_index = count-1
+                //console.log('append:',begin_index,end_index)
+            }
+        }
+    }
+    ListModel{
+        id: show_model
     }
 
     ListView{
@@ -25,9 +44,45 @@ RibbonView{
         Layout.preferredHeight: contentHeight
         Layout.preferredWidth: parent.width
         interactive: false
-        model: message_model
+        model: show_model
         add: Transition {
-            NumberAnimation { properties: "x,y"; from: message_list.height; duration: 1000 }
+            NumberAnimation { properties: "y"; from: message_list.height; duration: 200 }
+        }
+        displaced: Transition {
+            NumberAnimation { properties: "y"; duration: 200 }
+        }
+    }
+    Connections{
+        target: view
+        function onPull_up_triggered()
+        {
+            for(let i = message_model.begin_index - 1, count = 0;
+                i >= 0 && count < max_msg_num; i--,count++ )
+            {
+                show_model.insert(0,message_model.get(i))
+                message_model.begin_index = i
+                if (show_model.count > max_msg_num + 2)
+                {
+                    show_model.remove(show_model.count - 1)
+                    message_model.end_index--
+                }
+            }
+            //console.log('up:',message_model.begin_index,message_model.end_index)
+        }
+        function onPull_down_triggered()
+        {
+            for(let i = message_model.end_index + 1, count = 0;
+                i < message_model.count && count < max_msg_num; i++,count++ )
+            {
+                show_model.append(message_model.get(i))
+                message_model.end_index = i
+                if (show_model.count > max_msg_num)
+                {
+                    show_model.remove(0)
+                    message_model.begin_index++
+                }
+            }
+            //console.log('down:',message_model.begin_index,message_model.end_index)
         }
     }
 }
diff --git a/app_source/qml/components/SerialPortAssistant.qml b/app_source/qml/components/SerialPortAssistant.qml
index 83781a4..d8985ac 100644
--- a/app_source/qml/components/SerialPortAssistant.qml
+++ b/app_source/qml/components/SerialPortAssistant.qml
@@ -22,7 +22,7 @@ Item{
         top_padding: serial_title_bar.height + control.top_padding + (!RibbonTheme.modern_style ? 10 : 0)
         bottom_padding: message_sender.height + control.bottom_padding
         delegate: ZigBeeMessage{
-            sender_text: `${Qt.formatDateTime(new Date(), "yyyy-MM-dd hh:mm:ss.zzz")} ${model.recieved ? '收' : '发'}`
+            sender_text: `${model.time} ${model.recieved ? '收' : '发'}`
             show_tooltip: control.show_tooltip
             component_width: serial_view.width / 2
         }
diff --git a/app_source/qml/components/ZigBeeMessage.qml b/app_source/qml/components/ZigBeeMessage.qml
index d8a741e..4142b95 100644
--- a/app_source/qml/components/ZigBeeMessage.qml
+++ b/app_source/qml/components/ZigBeeMessage.qml
@@ -5,7 +5,7 @@ import RibbonUI
 
 RibbonMessage{
     id: message_style
-    sender_text: data_model.recieved ? `${Qt.formatDateTime(new Date(), "yyyy-MM-dd hh:mm:ss ")} Node 0x${data_model.sender}` : `${Qt.formatDateTime(new Date(), "yyyy-MM-dd hh:mm:ss ")} Computer 0x${data_model.sender}`
+    sender_text: data_model.recieved ? `${data_model.time} Node 0x${data_model.sender}` : `${data_model.time} Computer 0x${data_model.sender}`
     property var text_list: data_model.text ? data_model.text.split(' ') : []
     property var decrypted_text_list: data_model.decrypted_text ? data_model.decrypted_text.split(' ') : []
     property bool show_tooltip: true
diff --git a/app_source/source/eventsbus.cpp b/app_source/source/eventsbus.cpp
index 8eb647c..dc0d829 100644
--- a/app_source/source/eventsbus.cpp
+++ b/app_source/source/eventsbus.cpp
@@ -35,7 +35,7 @@ void EventsBus::push_data(QString type, QJsonObject data)
     if (_event_history.count() >= 100)
         _event_history.pop_front();
     if (data["time"].toString()=="")
-        data.insert("time",QJsonValue(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss")));
+        data.insert("time",QJsonValue(QDateTime::currentDateTime().toString("yyyy-MM-dd hh:mm:ss.zzz")));
     _event_history.append(data);
     for (auto event : _events) {
         if (event->type() == type)