poller.ps1

$Logfile = "poller.log"
$url = "http://domain/path/ip.php"

# http://stackoverflow.com/a/7835668
Function LogWrite
{
	Param ([string]$logstring)
	$dt = Get-Date -date (Get-Date).ToUniversalTime()-UFormat "%Y%m%d-%T "
	$logstring = $dt + $logstring
	Add-content $Logfile -value $logstring
}

$w = New-Object net.webclient

while ($TRUE){
	try
	{
		$data = $w.DownloadString($url)
		IF ($data -ne "0")
		{
			LogWrite "Error: Error happened on remote side."
		}
	}
	catch [Exception]
	{
		$error = "Error: " + $_
		LogWrite $error
	}
	
	Start-Sleep (5*60)
}