ReadLine() eingebaut, da es so zuverlässiger funktioniert

CocktailWeb/Pages/SerialTest.razor

@@ -56,8 +56,8 @@
         Receiving = true;
         SerialPort port = (SerialPort)sender;
         if (port != null)
-        {
-            var text = port.ReadExisting();
+        {            
+            var text = port.ReadLine();
             Console.WriteLine(text);
             receivedText = text;
             InvokeAsync(StateHasChanged);