using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO.Ports;

namespace RS232Test
{
    class Temp
    {
        private const char STX = (char)0x02;
        private const char ETX1 = (char)0x0D;
        private const char ETX2 = (char)0x0A;
        private string inStream = "";

        private SerialPort serialPort = new SerialPort();

        private void DataReceived(object sender, EventArgs e)
        {
            string data = serialPort.ReadExisting();

            //printText.AppendText(data);

            char[] startCheckArr = data.ToCharArray();
            if (startCheckArr.Length < 1)
                return;

            if (startCheckArr[0] == STX)
                inStream = data;

            string[] splited = inStream.Split(STX);
            foreach (string content in splited)
            {
                char[] endCheckArr = content.ToCharArray();
                if (endCheckArr.Length < 1)
                    continue;

                int etxIndex = Array.IndexOf(endCheckArr, ETX1);
                if (etxIndex < 1)
                    continue;

                etxIndex = Array.IndexOf(endCheckArr, ETX2);
                if (etxIndex < 1)
                    continue;

                string message = content.Substring(0, etxIndex);
                //DoWork(message);
            }
        }
    }
}