将attention信号的数值输给arduino开发板，老是有问题

前面是通过mindwave耳机检测了信号，然后我将其中的attention信号数值输给arduino电路板，每输出一次，开关一次串口，为了避免还没关上有打开发生错误，设置了20ms的延时，但是为什么信号每隔八秒才出来一次，而且有时出了几次就停住了，有时能一直走下去？求大佬帮忙看看
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.IO;
using System.IO.Ports;
using NeuroSky.ThinkGear;
using NeuroSky.ThinkGear.Algorithms;
namespace testprogram {
class Program {
static Connector connector;
static byte poorSig;
public static void Main(string[] args) {
Console.WriteLine("HelloEEG!");
// Initialize a new Connector and add event handlers
connector = new Connector();
connector.DeviceConnected += new EventHandler(OnDeviceConnected);
connector.DeviceConnectFail += new EventHandler(OnDeviceFail);
connector.DeviceValidating += new EventHandler(OnDeviceValidating);
// Scan for devices across COM ports
// The COM port named will be the first COM port that is checked.
connector.ConnectScan("COM40");
// Blink detection needs to be manually turned on
connector.setBlinkDetectionEnabled(true);
Thread.Sleep(450000);
System.Console.WriteLine("Goodbye.");
connector.Close();
Environment.Exit(0);
}
// Called when a device is connected
static void OnDeviceConnected(object sender, EventArgs e) {
Connector.DeviceEventArgs de = (Connector.DeviceEventArgs)e;
Console.WriteLine("Device found on: " + de.Device.PortName);
de.Device.DataReceived += new EventHandler(OnDataReceived);
}
// Called when scanning fails
static void OnDeviceFail(object sender, EventArgs e) {
Console.WriteLine("No devices found! :(");
}
// Called when each port is being validated
static void OnDeviceValidating(object sender, EventArgs e) {
Console.WriteLine("Validating: ");
}
// Called when data is received from a device
static void OnDataReceived(object sender, EventArgs e) {
//Device d = (Device)sender;
Device.DataEventArgs de = (Device.DataEventArgs)e;
DataRow[] tempDataRowArray = de.DataRowArray;
TGParser tgParser = new TGParser();
tgParser.Read(de.DataRowArray);
/* Loops through the newly parsed data of the connected headset*/
// The comments below indicate and can be used to print out the different data outputs.
for (int i = 0; i < tgParser.ParsedData.Length; i++){
if (tgParser.ParsedData[i].ContainsKey("Raw")){
//Console.WriteLine("Raw Value:" + tgParser.ParsedData[i]["Raw"]);
}
if (tgParser.ParsedData[i].ContainsKey("PoorSignal")){
//The following line prints the Time associated with the parsed data
Console.WriteLine("Time:" + tgParser.ParsedData[i]["Time"]);
//A Poor Signal value of 0 indicates that your headset is fitting properly
Console.WriteLine("Poor Signal:" + tgParser.ParsedData[i]["PoorSignal"]);
poorSig = (byte)tgParser.ParsedData[i]["PoorSignal"];
File.WriteAllText("1.txt", string.Format("Poor Signal:" + tgParser.ParsedData[i]["PoorSignal"]));
}
if (tgParser.ParsedData[i].ContainsKey("Attention")) {
Console.WriteLine("" + tgParser.ParsedData[i]["Attention"]);
int t = 1;
while (t<200)
{
SerialPort port;
port = new SerialPort("COM4", 9600);
port.Open();
port.Write("" + tgParser.ParsedData[i]["Attention"]);
port.Close();
Thread.Sleep(20);
t++;
}
}
if (tgParser.ParsedData[i].ContainsKey("Meditation")) {
Console.WriteLine("Med Value:" + tgParser.ParsedData[i]["Meditation"]);
}
if(tgParser.ParsedData[i].ContainsKey("EegPowerDelta")) {
Console.WriteLine("Delta: " + tgParser.ParsedData[i]["EegPowerDelta"]);
}
if (tgParser.ParsedData[i].ContainsKey("BlinkStrength"))
{
Console.WriteLine("Eyeblink " + tgParser.ParsedData[i]["BlinkStrength"]);
}
}
}
}
}