get-printerdata-example.ps1

# Com Object for making SNMP calls
$SNMP = new-object -ComObject olePrn.OleSNMP

# Printer objects from our print server
$All_Printers = get-printer -ComputerName $Config.PrintServer

# Array of printers to output, which will contain toner data, and some data from our print server.
$Printers = New-Object System.Collections.ArrayList

foreach ($Printer in $All_Printers) {
    # Port name from the print server. You might have to clean up your port names 
    # if you have dupes or you've named them other then the IP address.
    $Address = $Printer.PortName 

    #Name from the Print Server
    $Name = $Printer.Name

    # This could be better, but we check if the printer is online,
    # if not we set its online state to false. 
    if (!(Test-Connection $address -Quiet -Count 1)) {$onlineState = $False}

    # If the printer is online, we get the toner data. 
    if (Test-Connection $address -Quiet -Count 1) {
        $onlineState = $True

        # The Open method takes 4 params. Host, Community, Retry, and Timeout. 
        $SNMP.Open($Address, "public", 2, 3000)

        # The Get method takes one param, a string representing the OID you want to query. 
        # This gets the printer type, in this case, HP M553DN. 
        $printertype = $snmp.Get(".1.3.6.1.2.1.25.3.2.1.3.1")

        # This is where things get weird. There are two OIDs you need to get, 
        # one I've called Toner Volume, more accuretly, Toner maximum? And then the Current Volume.
        # These are not small numbers if I remember correctly. Lastly, I calculate a percentage
        # based on those two numbers so we can get some data worth using. 

        $black_tonervolume = $snmp.get("43.11.1.1.8.1.1")
        $black_currentvolume = $snmp.get("43.11.1.1.9.1.1")
        [int]$black_percentremaining = ($black_currentvolume / $black_tonervolume) * 100

        $cyan_tonervolume = $snmp.get("43.11.1.1.8.1.2")
        $cyan_currentvolume = $snmp.get("43.11.1.1.9.1.2")
        [int]$cyan_percentremaining = ($cyan_currentvolume / $cyan_tonervolume) * 100

        $magenta_tonervolume = $snmp.get("43.11.1.1.8.1.3")
        $magenta_currentvolume = $snmp.get("43.11.1.1.9.1.3")
        [int]$magenta_percentremaining = ($magenta_currentvolume / $magenta_tonervolume) * 100

        $yellow_tonervolume = $snmp.get("43.11.1.1.8.1.4")
        $yellow_currentvolume = $snmp.get("43.11.1.1.9.1.4")
        [int]$yellow_percentremaining = ($yellow_currentvolume / $yellow_tonervolume) * 100
    }

    # I then store that data in a PSCustomObject, and add it to our ArrayList, 
    # and then close out the SNMP connection. There is a helper function here 
    # called ReturnZeroIfNegitive (I should fix that spelling) that does what it says. 
    # I'm not 100% sure why, and I'm sure someone can tell me, but sometimes you'll get a result of -2 or -3, 
    # and this just zeros that out. 

    $PrinterData = [PSCustomObject] @{
        "Name"        = $Name
        "Type"        = $printertype
        "Address"     = $Address
        "OnlineState" = $onlineState
        "Toner"       = @{
            "Name"    = "Toner Levels"
            "Max"     = 100 # This is a hacky workaround for setting min and max values in UD bar charts. 
            "Min"     = 0
            "Black"   = ReturnZeroIfNegitive -Data $black_percentremaining
            "Yellow"  = ReturnZeroIfNegitive -Data $Yellow_percentremaining
            "Cyan"    = ReturnZeroIfNegitive -Data $Cyan_percentremaining
            "Magenta" = ReturnZeroIfNegitive -Data $Magenta_percentremaining

        }
    }

    $Printers.Add($PrinterData)

    $SNMP.Close()
}