GodSerialPort serial = new GodSerialPort("COM1", 9600,0);

serial.UseDataReceived(true,(sp,bytes)=>{});

serial.Open();

byte[] bytes = new byte[]{31,32,33,34};
serial.Write(bytes);
serial.Write(bytes,offset:1,count:2);
serial.WriteHexString("7E 48 53 44");
serial.WriteAsciiString("ascii string");

byte[] bytes = serial.Read();
string stringAsciiOrHex = serial.ReadString();

class Program
{
    static void Main(string[] args)
    {
        Console.Write("input serialport number(only 0-9):");
        string read = Console.ReadLine();
        bool flag = uint.TryParse(read, out uint num);
        if (!flag)
        {
            Exit();
        }

        GodSerialPort gsp = new GodSerialPort("COM"+num, 9600,0);
        gsp.UseDataReceived(true,(sp,bytes) => {
             string buffer = string.Join(" ", bytes);
             Console.WriteLine("receive data:" + buffer);
        });
        flag = gsp.Open();

        if (!flag)
        {
            Exit();
        }

        Console.WriteLine("serialport opend");

        Console.WriteLine("press any thing as data to send,press key 'q' to quit.");

        string data = null;
        while (data == null || data.ToLower()!="q")
        {
            if (!string.IsNullOrEmpty(data))
            {
                Console.WriteLine("send data:"+data);
                gsp.WriteAsciiString(data);
            }
            data = Console.ReadLine();
        }
    }

    static void Exit()
    {
        Console.WriteLine("press any key to quit.");
        Console.ReadKey();
        Environment.Exit(0);
    }
}