registered event handler for connection request from UI,

created binding between settings view model and view,
created first settings view

MultiTerm.Core/ViewModel/TerminalViewModel.cs

@@ -12,10 +12,27 @@ public abstract partial class TerminalViewModel : ObservableObject, ITerminalVie
     public abstract TerminalViewType ViewType { get; }  
     public ProtocolType ProtocolType { get; set; }
     public ICommunicationProtocol? CommunicationProtocol { get; set; }
-    public IProtocolSettingsViewModel? ProtocolSettings { get; set; }
-
+    
     public event EventHandler? ClosingEvent;
 
+    private IProtocolSettingsViewModel? protocolSettings;
+
+    public IProtocolSettingsViewModel? ProtocolSettings
+    {
+        get { return protocolSettings; }
+        set 
+        { 
+            protocolSettings = value; 
+            // register event handler for connection request from viewmodel
+            if(value != null)
+            {
+                protocolSettings!.ConnectRequested += OnViewModelRequestedConnect;
+                protocolSettings!.DisconnectRequested += OnViewModelRequestedDisconnect;
+            }
+        }
+    }
+
+
     /// <summary>
     /// Method to override if any closing actions are required.
     /// Closing can be cancelled using the return value.
@@ -31,4 +48,14 @@ public abstract partial class TerminalViewModel : ObservableObject, ITerminalVie
             ClosingEvent?.Invoke(this, EventArgs.Empty);
         }
     }
+
+    private void OnViewModelRequestedConnect(object? sender, EventArgs e)
+    {
+        this.CommunicationProtocol?.Connect();
+    }
+
+    private void OnViewModelRequestedDisconnect(object? sender, EventArgs e)
+    {
+        this.CommunicationProtocol?.Disconnect();
+    }
 }

MultiTerm.Protocols/ProtocolSettingsViewModel.cs

@@ -20,8 +20,9 @@ public abstract partial class ProtocolSettingsViewModel : ObservableObject, IPro
 
     /// <summary>
     /// Indicates wether the settings can currently be edited.
+    /// Initially are editable
     /// </summary>
-    public bool AreEditable;
+    public bool AreEditable = true;
 
     [ObservableProperty]
     private string connectDisconnectButtonText = disconnectedStateButtonText;

MultiTerm.Wpf/View/SendReceiveView.xaml

@@ -4,9 +4,29 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
              xmlns:local="clr-namespace:MultiTerm.Wpf.View"
+             xmlns:protocol_serial="clr-namespace:MultiTerm.Protocols.Serial;assembly=MultiTerm.Protocols"
+             xmlns:settings_view="clr-namespace:MultiTerm.Wpf.View.SettingsView"
              mc:Ignorable="d" 
              d:DesignHeight="450" d:DesignWidth="800">
     <Grid>
-            
+        <Grid.ColumnDefinitions>
+            <ColumnDefinition Width="*"/>
+        </Grid.ColumnDefinitions>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="50px"/>
+            <RowDefinition Height="*"/>
+        </Grid.RowDefinitions>
+        
+        <!-- Settings View Model -->
+        <GroupBox Header="Protocol Settings" Grid.Row="0" Grid.Column="0">
+            <!-- Register additional Settings ViewModels here -->
+            <ContentControl Content="{Binding ProtocolSettings}" IsEnabled="{Binding AreEnabled}">
+                <ContentControl.Resources>
+                    <DataTemplate DataType="{x:Type protocol_serial:SerialProtocolSettingsViewModel}">
+                        <settings_view:SerialSettingsView/>
+                    </DataTemplate>
+                </ContentControl.Resources>
+            </ContentControl>
+        </GroupBox>
     </Grid>
 </UserControl>

MultiTerm.Wpf/View/SettingsView/SerialSettingsView.xaml

@@ -0,0 +1,12 @@
+<UserControl x:Class="MultiTerm.Wpf.View.SettingsView.SerialSettingsView"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
+             xmlns:local="clr-namespace:MultiTerm.Wpf.View.SettingsView"
+             mc:Ignorable="d" 
+             d:DesignHeight="50" d:DesignWidth="800">
+    <StackPanel Orientation="Horizontal">
+        <Button Command="{Binding ConnectDisconnectCommand}" Content="{Binding ConnectDisconnectButtonText}" Width="80"></Button>
+    </StackPanel>
+</UserControl>

MultiTerm.Wpf/View/SettingsView/SerialSettingsView.xaml.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace MultiTerm.Wpf.View.SettingsView
+{
+    /// <summary>
+    /// Interaction logic for SerialSettingsView.xaml
+    /// </summary>
+    public partial class SerialSettingsView : UserControl
+    {
+        public SerialSettingsView()
+        {
+            InitializeComponent();
+        }
+    }
+}

MultiTerm.Wpf/View/ShellView.xaml

@@ -57,9 +57,6 @@
                     </MenuItem.Icon>-->
                 </MenuItem>
             </MenuItem>
-            <MenuItem Header="Test">
-                <MenuItem Header="Item1" Command="{Binding TestButtonClickedCommand}"/>
-            </MenuItem>
             <MenuItem Header="_Settings">
                 <controls:SingleSelectSubMenu Title="Default Newline Separator on Receive" HorizontalContentAlignment="Left" VerticalContentAlignment="Top"
                           OptionsSource="{Binding Source={StaticResource NewlineSeparatorTypeValues}}"