IPC via stdinwrite() and consoleread()

Hello I am attempting some IPC between two scripts, I have been able to get it to work this way in the past, but it's been a long while since I've coded that script.

Below is what I have so far, what it should do is write the current number to the stdin stream of the child process, and the child process should write to a file any data it receives.

However it seems the child process is not getting the messages.

#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_Change2CUI=y
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****
if not @Compiled then Exit
If $cmdlineraw = "/IPC" Then
    $buffer = ""
    While 1
        Sleep(10)
        _checkstdin()
    WEnd
EndIf
$IPC = run(@ScriptFullPath&" /IPC", @ScriptDir, @SW_HIDE)
$i = 0
while 1
    StdinWrite($IPC, $i)
    ConsoleWrite($I&@CRLF)
    $i += 1
    sleep(10)
WEnd
func _checkstdin()
;subprocess gets commands and sends to main
$buffer &= ConsoleRead()
if $buffer <> "" Then
FileWrite(@ScriptDir&'\log.txt', $buffer&@CRLF)
EndIf
$buffer = ""
EndFunc

(this must be compiled to work, obviously)