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hello guys.. i wondering is there any wrong with my code since i try to run it just now and noting happen

code of arduino
const int threhold = 100;
int sensorReading;
int irs=0;
void setup()
 pinMode(irs, INPUT);
void loop()
  sensorReading = analogRead(irs);
  if(sensorReading > threhold)

code of vb
Imports System.IO
Imports System.IO.Ports

Dim val As Integer

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        SerialPort1.Encoding = System.Text.Encoding.Default
        val = SerialPort1.ReadLine
        If val = 0 Then
            PictureBox1.Image = My.Resources.Button_Blank_Red_icon__1_
        ElseIf val = 1 Then
            PictureBox1.Image = My.Resources.Button_Blank_Green_icon_2
        End If
    End Sub
[no name] 18-Jun-13 8:13am    
Try sending a newline from the arduino side since that is what the serial port ReadLine is waiting for,
arnoldxx 19-Jun-13 5:53am    
can u gime an example bro.. sorry i m still new in this progress.. might need some help from you guys.. thanks..

1 solution

You are sending (Arduino side) string values and checking (on VB side) for integer values. Instead you should either:
  • send integer values (e.g. Serial.Write(1)) and check for integer values.

  • send string values and check for string values (e.g. if str = "0" ).
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arnoldxx 18-Jun-13 6:57am    
ty for the feedback..
i have follow the step that u show it to me by changing the if val = 0 to if val = "0"
but it still won't work to me..

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