Tests mit SerialPort

CocktailWeb/Pages/Index.razor

@@ -1,4 +1,5 @@
 @page "/"
+@using System.IO.Ports
 
 <PageTitle>Index</PageTitle>
 
@@ -6,4 +7,47 @@
 
 Welcome to your new app.
 
-<SurveyPrompt Title="How is Blazor working for you?" />
+<label for="portname">Port:</label>
+<InputText id="portname" @bind-Value="portname"></InputText>
+<button @onclick="SendData">Send data to Arduino</button>
+<p>
+    <label>Received: @receivedText</label>
+</p>
+
+
+
+@code {
+    SerialPort? port;
+    string? portname = "COM5";
+    string? receivedText;
+
+    public async Task SendData()
+    {
+        if (port == null && portname != null)
+        {
+            port = new SerialPort(portname);
+            port.BaudRate = 9600;
+            port.DataReceived += port_DataReceived;
+            port.DataBits = 8;
+            port.StopBits = StopBits.One;
+            port.Parity = Parity.None;
+            port.Handshake = Handshake.None;
+            port.RtsEnable = true;
+
+        }
+        if (port == null || port.IsOpen) return; // Port konnte nicht initialisiert werden oder ist bereits geöffnet - dann nicht nochmal öffnen
+        port.Open();
+        port.WriteLine("<RECIPE>");
+
+    }
+
+    private void port_DataReceived(object sender, SerialDataReceivedEventArgs e)
+    {
+        if (port != null)
+        {
+            var text = port.ReadExisting();
+            receivedText = text;
+            port.Close();
+        }
+    }
+}