@page "/"
@using System.IO.Ports

<PageTitle>Index</PageTitle>

<h1>Hello, world!</h1>

Welcome to your new app.

<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();
        }
    }
}