Get-ProliantTemperatures.ps1

#requires -version 3
<#
.SYNOPSIS
Get-ProliantTemperatures - Get HP ProLiant temperature sensor readings and status for PRTG

.DESCRIPTION 
Reads the status of HP ProLiant temperatures sensors via WMI and HP WBEM
and 

http://www.hp.com/go/HPwbem

.OUTPUTS
XML formatted for a PRTG Advanced Script Sensor. 
Numeric status per channel.

.LINK
http://daniel.streefkerkonline.com/monitoring-hp-proliant-via-powershell-wmi-temperature-sensors/

.NOTES
Written By: Daniel Streefkerk
Website:	http://daniel.streefkerkonline.com
Twitter:	http://twitter.com/dstreefkerk
Todo:       Nothing at the moment

Change Log
https://gist.github.com/dstreefkerk/10226460
#>

Param(
  [Parameter(Position=0,Mandatory=$true,ValueFromPipeline=$false,HelpMessage='Name of the server to connect to')]
  [String]
  $ServerName
)

#region Setup
$operationalStatus = @{ 
                        '0'="Unknown" 
                        '2'="OK" 
                        '3'="Degraded" 
                        '6'="Error" 
                        }  
$healthStates = @{ 
                    '0'="Unknown" 
                    '5'="OK" 
                    '10'="Degraded" 
                    '15'="Minor" 
                    '20'="Major" 
                    '25'="Critical" 
                    '30'="Non-Recoverable" 
                    }

# I'm setting an arbitrary warning threshold at 75%
$warningThreshold = 0.75

#endregion

# First, test that we can use WMI
$wmiErrorVariable = @()
try {
    $computerSystem = Get-WmiObject -Namespace ROOT\CIMV2 -Class Win32_ComputerSystem -ComputerName $ServerName -ErrorAction Stop -WarningAction SilentlyContinue -ErrorVariable wmiErrorVariable
    }
catch [System.UnauthorizedAccessException] {
    $wmiError = $true
    $wmiErrorMessage = "WMI Access to $ServerName is denied. Error: $($_.Exception.Message)"
}
catch [System.Runtime.InteropServices.COMException] {
    $wmiError = $true
    $wmiErrorMessage = "Couldn't query $ServerName via WMI. Error: $($_.Exception.Message)"
}
catch {
    $wmiError = $true
    $wmiErrorMessage = $_.Exception.Message
}
finally {
    if ($wmiError -eq $true) {
        "<prtg>"
        "<error>1</error>"
        "<text>$wmiErrorMessage $($_.Exception.Message)</text>"
        "</prtg>"
        Exit
    }
}

# Get all of the sensors via WMI
$tempSensors = Get-WmiObject -Namespace ROOT\HPQ -Class HP_NumericSensor -ComputerName $ServerName -WarningAction SilentlyContinue -ErrorAction SilentlyContinue -ErrorVariable wmiError

# If the ROOT\HPQ WMI query failed, throw an error.
if ($wmiError.Count -gt 0) {
    "<prtg>"
    "<error>1</error>"
    "<text>The Insight WBEM Management Providers don't seem to be installed on $($ServerName.ToUpper()). Error: $($wmiError.Exception.Message)</text>"
    "</prtg>"
    Exit
}

# If there are no temp sensors
if ($tempSensors.Count -eq 0) { exit }

$customSensors = @()

foreach ($sensor in $tempSensors) {
    $thisSensor = New-Object psobject

    # If we can't get a temperature reading, skip to the next sensor
    if (($sensor | Get-Member *currentreading*) -eq $null) {
        continue
    }

    # A name for the channel
    $thisSensor | Add-Member -MemberType "NoteProperty" -Name "Name" -Value "$($sensor.name): $((Select-String -InputObject $sensor.description -Pattern '(?<=detects for )(.*)(?=. Temp)' -AllMatches).Matches[0].Value)"
    
    # The temperature reading
    $thisSensor | Add-Member -MemberType "NoteProperty" -Name "Reading" -Value $sensor.CurrentReading

    # Try and get the upper threshold value if it's supported
    if (($sensor | Get-Member *UpperThresholdCritical*) -ne $null) {
        $thisSensor | Add-Member -MemberType "NoteProperty" -Name "LimitMaxError" -Value $($sensor.UpperThresholdCritical)
        $thisSensor | Add-Member -MemberType "NoteProperty" -Name "LimitMaxWarning" -Value $($sensor.UpperThresholdCritical * $warningThreshold)
    }
    
    # If the Health State of the sensor is not equal to 5 (OK), we'll be setting the whole PRTG sensor to error
    if ($sensor.HealthState -ne 5) {
        $thisSensor | Add-Member -MemberType NoteProperty -Name "Error" -Value $true
        $thisSensor | Add-Member -MemberType NoteProperty -Name "StateMessage" -Value "$($sensor.name) is in the following health state: $($healthStates["$($sensor.HealthState)"]). "
    } else {
        $thisSensor | Add-Member -MemberType NoteProperty -Name "Error" -Value $false
        $thisSensor | Add-Member -MemberType NoteProperty -Name "StateMessage" -Value $null
    }

    $customSensors += $thisSensor
}

# If you don't use PRTG, you could just un-comment the below line
#$customSensors | ft -AutoSize; exit;

"<prtg>"
foreach ($customSensor in $customSensors) {
    "<result>"
        "<channel>$($customSensor.name)</channel>"
        "<value>$($customSensor.reading)</value>"
        "<unit>Temperature</unit>"
        if ($customSensor.limitmaxerror -ne $null) {
            "<LimitMaxError>$([decimal]::round($customSensor.limitmaxerror))</LimitMaxError>"
        }
        "<LimitMaxWarning>$([decimal]::round($customSensor.limitmaxwarning))</LimitMaxWarning>"
    "</result>"
}

if (($customSensors | where error -eq $true).count -gt 0) {
"<error>1</error>"
"<text>$($customSensors | where error -eq $true | % {$($_.StateMessage)})</text>"
}

"</prtg>"