Byte Array to send over socket

[Cainnech]

Hello everybody,

I'm trying to communicate with a device using a winsocket.
I want to try and change it's IPaddress so I need to follow a specific sequence.

So I need to start with a DLE + STX, then the IP-number, the subnet, the gateway, the port and if DHCP should be enabled or not and finally another DLE + ETX.

I'm creating a byte array to send all of the info but there are two questions that I have doing this.

#1 How do I send the control characters (DLE / STX / ETX)?
#2 How do I split up the port in multiple bytes?

Below is my code:

' First extract all data
Dim Bites(16) As Byte '9-byte array
Dim IP() As String
Dim Subnet() As String
Dim Gateway() As String
Dim Port As String
 
' IPAddress
    IP = Split(txtModuleIp.Text, ".")
 
' Subnet
    Subnet = Split(txtModuleSubnet.Text, ".")
 
' Gateway
    Gateway = Split(txtModuleGateway.Text, ".")
 
' Port
    Port = txtModulePort.Text
 
 
 
' Create Byte array
    Bites(0) = DLE
    Bites(1) = STX
    Bites(2) = IP(0) '192
    Bites(3) = IP(1) '168
    Bites(4) = IP(2) '1
    Bites(5) = IP(3) '11
    Bites(6) = Subnet(0) '255
    Bites(7) = Subnet(1) '255
    Bites(8) = Subnet(2) '255
    Bites(9) = Subnet(3) '0
    Bites(10) = Gateway(0) '192
    Bites(11) = Gateway(1) '168
    Bites(12) = Gateway(2) '1
    Bites(13) = Gateway(3) '1
    Bites(14) = Port '50505
    Bites(15) = Dhcp '0 for disabled / 1 for enabled
    Bites(16) = DLE
    Bites(17) = ETX
 
    If Sock.State = sckConnected Then
        Sock.SendData Bites
        lblStatus.Caption = "  Sending message"
    End If
 

When I execute this code I'm receiving the all of the numeric info without a problem, with the exception of the port because it's too long.
The control characters are being displayed as 0.

So I'm guessing that there is a conflict in the way I'm trying to send these values.
Ideally I would like to send it as hex but my bytearray doesn't seem to allow me.

If anybody has some ideas, it would be very helpful.

Thanks,
Kenneth

[Killer42]

DLE etc are just names for ASCII values. Look up the codes you need in any ASCII reference table (here, for example). Since you're talking about a byte array, you can just plug in the values directly. For example ETX would be (if I remember my syntax correctly) &H03.

Personally, I'd create a bunch of named constants such as Public Const ETX As Byte = &H03 - then you can go ahead and use the names in your code.

Sorry, not sure about what's required for part 2 of your question.