VB6 SMS Gateway: Menambahkan Fitur Auto Reply

Mengenai cara membalas SMS secara otomatis melalui aplikasi VB6 - Sebelumnya kita telah membahas mengenai cara menerima SMS baru klik disini, nah sekarang kita akan menambahkan fitur auto reply melalui AT Commands dengan aplikasi VB6 yang kita buat sendiri. Adapun contoh kode VB6 membalas SMS otomatis adalah seperti di bawah ini:

Option Explicit

Dim strBuffer As String
Dim blnFirstLoad As Boolean

Private Sub Command1_Click()
    If MSComm1.PortOpen = True Then MSComm1.PortOpen = False
    With MSComm1
        .PortOpen = True
        .Output = "AT+CMGS=" & Chr(34) & TxtNumber.Text & Chr(34) & vbCrLf
        .Output = TxtMessage.Text & Chr(26)
    End With
End Sub

Private Sub Form_Load()
    With MSComm1
        .CommPort = 7 'port disesuaikan atau beri kode auto detect port modem
        .Settings = "115200,N,8,1"
        .Handshaking = comRTS
        .RTSEnable = True
        .DTREnable = True
        .RThreshold = 1
        .SThreshold = 1
        .NullDiscard = True
        .InputMode = comInputModeText
        .InputLen = 0
        .PortOpen = True
    End With
End Sub

Private Sub Form_Unload(Cancel As Integer)
    If MSComm1.PortOpen = True Then
        MSComm1.PortOpen = False
    End If
End Sub

Private Sub MSComm1_OnComm()
    Select Case MSComm1.CommEvent
        Case comEvReceive
            strBuffer = strBuffer & MSComm1.Input
    Do
        strBuffer = strBuffer & MSComm1.Input
    Loop While MSComm1.InBufferCount
    If InStr(1, strBuffer, "+CMGR") Then
        If InStr(1, strBuffer, "OK") Then
            Text1.Text = strBuffer
        End If
    End If
    If InStr(1, strBuffer, "+CMTI") > 0 Then
        If Right(strBuffer, 1) = vbLf Then
            Dim s() As String
            s = Split(strBuffer, ",")
            Debug.Print s(UBound(s))
             ReadSMSByIndex Trim$(s(UBound(s)))
             Delay 1
             Command1_Click 'Auto reply
            strBuffer = ""
        End If
    End If
    End Select
End Sub

Private Sub ReadSMSByIndex(Index As Integer)
    strBuffer = ""
    MSComm1.Output = "AT+CMGR=" & Index & vbCrLf 'baca SMS yang berada di index ke-1
End Sub

Private Sub Delay(ByVal HowLong As Date)
    Dim endDate As Date
    endDate = DateAdd("s", HowLong, Now)
    While endDate > Now
        DoEvents
    Wend
End Sub

Demikian contoh kode VB6 untuk membalas SMS baru secara otomatis, Anda dapat memodifikasi kodenya untuk disesuaikan dengan kebutuhan.