สอบถามเรื่องเอาค่ามาสร้างเป็นเงื่อนไข Arduino+VB 2010

Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = False
        Dim lists As String() = IO.Ports.SerialPort.GetPortNames

        For i = 0 To lists.Count - 1
            ComboBox1.Items.Add(lists(i))
        Next
    End Sub

Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        If ComboBox1.SelectedItem = "" Then Return
        If SerialPort1.IsOpen Then SerialPort1.Close()
        If Button1.Text = "Connect" Then
            SerialPort1.BaudRate = 9600
            SerialPort1.PortName = ComboBox1.SelectedItem
            Try
                SerialPort1.Open()
                Button1.Text = "Disconnect"
                ComboBox1.Enabled = False
            Catch ex As Exception
                MsgBox(ex.Message)
            End Try
        Else
            Button1.Text = "Connect"
            ComboBox1.Enabled = True
        End If
    End Sub

Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived

        Dim line As String = SerialPort1.ReadLine()
        Label1.Text = line
    End Sub

int pingPin = 13;
    int inPin = 12;

     
    void setup() {
      Serial.begin(9600);
    }
     
    void loop()
    {
      long duration, cm;
     
      pinMode(pingPin, OUTPUT);
     

      digitalWrite(pingPin, LOW);
      delayMicroseconds(2);
      digitalWrite(pingPin, HIGH);
      delayMicroseconds(5);
      digitalWrite(pingPin, LOW);
      pinMode(inPin, INPUT);
      duration = pulseIn(inPin, HIGH);

      cm = microsecondsToCentimeters(duration);

      Serial.print(cm);
      Serial.print("cm");
      Serial.println();     
      delay(50);
    }
     
    long microsecondsToCentimeters(long microseconds)
    {
    }