Remote Control Light Switch via Facebook and PLC

This application use m.facebook.com for remote control light and PLC as a replacement light switch. The following demo video about this application.

A. Architecture of Remote Control Light Switch via Facebook
For this application, I use architecture as shown below.
Architecture of Remote Control Light Switch via Facebook and PLC

B. Preparations to make this application:
1. Basic Communication between PLC and Computer
2. Two Facebook accounts: one account for the server and one for client account
3. Internet connection
4. Download and Install Visual Basic 2010 express:
http://download.microsoft.com/download/1/E/5/1E5F1C0A-0D5B-426A-A603-1798B951DDAE/VS2010Express1.iso
5. Download project file: Control-Light-via-m-Facebook. Zip

C. Wiring PLC output, Light, Switch and AC Source
Wiring PLC output Light Switch and AC Source

D. Facebook Account Setting
1. Facebook Account Setting in Visual Basic
facebook account setting in visual basic

Remarks for the picture above:
1. Fill email for login to facebook account in this application (Facebook Server).
2. Fill password for login to facebook account in this application (Facebook Server).
3. Fill facebook id number for chat with this visual basic program, example Facebook id 40xxxxxxxxxxx43 and username my-light (Facebook Client)
Note: Facebook server name and Facebook client name has been friends.
This video about how to get facebook id number


This video about fill email, password, and facebook id number into visual basic program


2. Change Language to English (US)
Facebook Account for in visual basic program only support English (US) Language. How to change language facebook account to English (US):
1. Go to facebook.com in browser such as Google Chrome, Firefox, Internet Explorer, etc.
2. Login with email and password with Facebook account that used in visual basic
3. See picture to the next step
How to change language facebook account to English US


E. Application Test
1. Open Browser
2. Go to facebook.com and Login with Facebook client, example Facebook id 40xxxxxxxxxxx43 and username my-light that set in Facebook server (visual basic). 3. Go to Messages or Chat
4. Select Facebook Server Name or Facebook Account Name in visual basic
Note: Facebook server name and Facebook client name has been friends.
5. Type messages and click replay
F. Visual Basic Layout and Code for Remote Control Light Switch via Facebook and PLC
1. Visual basic layout
Visual basic layout of Remote Control Light Switch via Facebook and PLC

Visual basic layout running of Remote Control Light Switch via Facebook and PLC


2. Visual basic code
Imports System.Threading
Public Class Form1
'YOU’RE SETTING HERE
'Login to Facebook Server or Login to this facebook Visual Basic Program
Dim email_for_facebook_server As String = "fill your facebook email"
Dim password_for_facebook_server As String = "fill your facebook password"

'Facebook account ID for Chat with Facebook Server
Dim id_facebook_client As String = "fill number facebook account id"

'Serial Port Name for Communication PLC and Computer
Dim port_name As String = "COM3" 'change port name

'keyword for light on
Dim light_on As String = "my light on"

'keyword for light off
Dim light_off As String = "my light off"

'response for light on
Dim response_on As String = "Light Condition is Lit"

'response for light off
Dim response_off As String = "Light Condition is Not Lit"

'Time for messages read scan and response
Dim interval_messages_read As Integer = 5000 ' 5 second for messages scan


Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
Timer1.Enabled = True
WebBrowser1.ScriptErrorsSuppressed = True
Timer2.Interval = interval_messages_read

'Serial Communication Setting
SerialPort1.BaudRate = 9600
SerialPort1.DataBits = 8
SerialPort1.Parity = IO.Ports.Parity.Even
SerialPort1.PortName = port_name
SerialPort1.StopBits = IO.Ports.StopBits.One
Try
If SerialPort1.IsOpen = False Then SerialPort1.Open()
readQ_comd()
Catch ex As Exception
End Try
End Sub

Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles
Timer1.Tick
Timer1.Enabled = False
internet_checker:
Timer2.Enabled = False

WebBrowser1.Navigate("http://m.facebook.com")
While WebBrowser1.ReadyState <> WebBrowserReadyState.Complete
Application.DoEvents()
End While

'Change Language to English (US)
Dim page As HtmlElementCollection = WebBrowser1.Document.All
For Each elem As HtmlElement In page
If elem.GetAttribute("value") = "Log In" Then
Exit For
End If
If InStr(elem.GetAttribute("href"), "en_US") Then
elem.InvokeMember("click")
While WebBrowser1.ReadyState <> WebBrowserReadyState.Complete
Application.DoEvents()
End While
Exit For
End If
Next

'Login Checker in m.facebook
Try
WebBrowser1.Document.GetElementById("email").SetAttribute("value", email_for_facebook_server)
WebBrowser1.Document.GetElementById("pass").SetAttribute("value", password_for_facebook_server)
Catch ex As Exception
GoTo messages_read
End Try

Dim loginpage As HtmlElementCollection = WebBrowser1.Document.All
For Each elem As HtmlElement In loginpage
If elem.GetAttribute("value") = "Log In" Then
elem.InvokeMember("click")
While WebBrowser1.ReadyState <> WebBrowserReadyState.Complete
Application.DoEvents()
End While
Exit For
End If
Next

messages_read:
Timer2.Enabled = True
End Sub

Private Sub WebBrowser1_Navigated(sender As System.Object, e As System.Windows.Forms.WebBrowserNavigatedEventArgs) Handles WebBrowser1.Navigated
ToolStripStatusLabel2.Text = WebBrowser1.Url.ToString
End Sub

Private Sub Timer2_Tick(sender As System.Object, e As System.EventArgs) Handles Timer2.Tick
Try
If WebBrowser1.ReadyState = WebBrowserReadyState.Complete Then
'get facebook messages
WebBrowser1.Navigate("http://m.facebook.com/messages/read/?tid=id." & id_facebook_client)
While WebBrowser1.ReadyState <> WebBrowserReadyState.Complete
Application.DoEvents()
End While
'scroll to down
WebBrowser1.Document.Window.ScrollTo(0, WebBrowser1.Document.Window.Size.Height)
'check facebook messages
Dim msg As String = WebBrowser1.Document.GetElementById("messageGroup").InnerText
Dim line() As String = msg.Split(vbNewLine)
Dim index As Integer = line.Length - 2
Dim latest_messages As String = line(index)

If InStr(latest_messages, light_off) > 0 Then
bitQ(0)
Thread.Sleep(200)
readQ_comd()
End If
If InStr(latest_messages, light_on) > 0 Then
bitQ(1)
Thread.Sleep(200)
readQ_comd()
End If

End If
Catch ex As Exception
Timer2.Enabled = False
Timer1.Enabled = True
End Try
End Sub

Sub bitQ(ByVal Qv As Byte)
Dim Qx As Byte
Dim Qy As Byte

Qx = 0
Qy = 0

Dim str_write(0 To 37) As Byte
Dim Temp_FCS As VariantType
Dim i As Long

str_write(0) = &H68
str_write(1) = &H20
str_write(2) = &H20
str_write(3) = &H68
str_write(4) = &H2
str_write(5) = &H0
str_write(6) = &H7C
str_write(7) = &H32
str_write(8) = &H1
str_write(9) = &H0
str_write(10) = &H0
str_write(11) = &H43
str_write(12) = &H1
str_write(13) = &H0
str_write(14) = &HE
str_write(15) = &H0
str_write(16) = &H5
str_write(17) = &H5
str_write(18) = &H1
str_write(19) = &H12
str_write(20) = &HA
str_write(21) = &H10
str_write(22) = &H1 'len = 1
str_write(23) = &H0
str_write(24) = &H1
str_write(25) = &H0
str_write(26) = &H0 ' type q
str_write(27) = &H82 'type q
str_write(28) = &H0
str_write(29) = &H0
str_write(30) = Qx * 8 + Qy
str_write(31) = &H0
str_write(32) = &H3
str_write(33) = &H0
str_write(34) = &H1
str_write(35) = Qv

For i = 4 To 35
Temp_FCS = Temp_FCS + str_write(i)
Next
str_write(36) = Temp_FCS Mod 256
str_write(37) = &H16
If (SerialPort1.IsOpen = True) Then
'Clear in/out buffers:
SerialPort1.DiscardOutBuffer()
SerialPort1.DiscardInBuffer()

' Send the binary data out the port
SerialPort1.Write(str_write, 0, str_write.Length)

Thread.Sleep(100) 'wait 100ms

Call End_comm() 'end Communication

End If
End Sub
Sub End_comm()
'End Communication
Dim str_val(0 To 5) As Byte
str_val(0) = &H10
str_val(1) = &H2
str_val(2) = &H0
str_val(3) = &H5C
str_val(4) = &H5E
str_val(5) = &H16
If (SerialPort1.IsOpen = True) Then
SerialPort1.Write(str_val, 0, str_val.Length)
End If
End Sub

Sub readQ_comd()
Dim str_read(0 To 32) As Byte
Dim i As Integer
Dim Temp_FCS As VariantType
Dim Rx As String

Rx = 0

str_read(0) = &H68
str_read(1) = &H1B
str_read(2) = &H1B
str_read(3) = &H68
str_read(4) = &H2
str_read(5) = &H0
str_read(6) = &H6C
str_read(7) = &H32
str_read(8) = &H1
str_read(9) = &H0
str_read(10) = &H0
str_read(11) = &H0
str_read(12) = &H0
str_read(13) = &H0
str_read(14) = &HE
str_read(15) = &H0
str_read(16) = &H0
str_read(17) = &H4
str_read(18) = &H1
str_read(19) = &H12
str_read(20) = &HA
str_read(21) = &H10
str_read(22) = &H8 'read len 1=bit, 8=byte
str_read(23) = &H0
str_read(24) = &H1
str_read(25) = &H0

str_read(26) = &H0 ' type Ixy
str_read(27) = &H82 'type Ixy=&H81, Qxy=&H82
str_read(28) = &H0
str_read(29) = (Str(Rx) * 8) \ 256
str_read(30) = (Str(Rx) * 8) Mod 256

For i = 4 To 30
Temp_FCS = Temp_FCS + str_read(i)
Next i
str_read(31) = Temp_FCS Mod 256
str_read(32) = &H16
If (SerialPort1.IsOpen = True) Then
'Clear in/out buffers:
SerialPort1.DiscardOutBuffer()
SerialPort1.DiscardInBuffer()

' Send the binary data out the port
SerialPort1.Write(str_read, 0, str_read.Length)
Thread.Sleep(100) 'wait 100ms
Call End_comm() 'end communication
End If
End Sub

Public Delegate Sub DisplayData(ByVal Buffer() As Byte)
Private Sub Display(ByVal Buffer() As Byte)
Dim xyval As Byte
xyval = Buffer(26)
If (xyval And 1) = 1 Then
Try
WebBrowser1.Document.GetElementById("composerInput").SetAttribute("value", response_on)
Dim Replypage As HtmlElementCollection = WebBrowser1.Document.All
For Each elem As HtmlElement In Replypage
If elem.GetAttribute("value") = "Reply" Then
elem.InvokeMember("click")
Exit For
End If
Next
Catch ex As Exception
End Try
ToolStripStatusLabel1.Text = "ON"
End If

If (xyval And 1) = 0 Then
Try
WebBrowser1.Document.GetElementById("composerInput").SetAttribute("value", response_off)
Dim Replypage As HtmlElementCollection = WebBrowser1.Document.All
For Each elem As HtmlElement In Replypage
If elem.GetAttribute("value") = "Reply" Then
elem.InvokeMember("click")
Exit For
End If
Next
Catch ex As Exception
End Try
ToolStripStatusLabel1.Text = "OFF"
End If
End Sub

Private DisplayDelegate As New DisplayData(AddressOf Display)
Private Sub SerialPort1_DataReceived(ByVal sender As System.Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived
If (SerialPort1.IsOpen) Then
Try
Dim BytesAvailable As Integer = SerialPort1.BytesToRead
If BytesAvailable >= 29 Then
Dim Buffer(0 To BytesAvailable - 1) As Byte
SerialPort1.Read(Buffer, 0, BytesAvailable)
Me.BeginInvoke(DisplayDelegate, Buffer)
End If
Catch ex As TimeoutException
End Try
End If
End Sub

Private Sub Form1_FormClosed(sender As System.Object, e As System.Windows.Forms.FormClosedEventArgs) Handles MyBase.FormClosed
Try
If SerialPort1.IsOpen Then SerialPort1.Close()
Catch ex As Exception
End Try
End Sub
End Class
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