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Description

This example shows the how to write or read to any XCON(TCP/UDP) connection. The connection can be handled with LUA function. The write value can be written from any selected item, and the read value also be written to an output item.
The Read function should handle the incoming values and convert them to their HEX values. 
This tutorial has two functions: 

...

Code Block
languageapplescript
titleLUA 
function OnStartEvent() --this is a predefined function, add only the following linesline to the function.

local var
=
nxa.GetValue('NETx\\VAR\\String\\Item001')
xcon.CreateTCP("MyTCP","0",0,"127.0.0.1",23)

end


function Send_TcpHex()
local var = nxa.GetValue('NETx\\VAR\\String\\Item001')
xcon.SendHex("MyTCP", var)
end


function MyTCP_OnReceiveEvent(data, size, sourceip, sourceport)
local val= string.tohex(data)
nxa.SetValue('NETx\\VAR\\String\\Item002',val)
end

function string.tohex(str)
    return (str:gsub('.', function (c)
        return string.format('%02X', string.byte(c))
    end))
end

...