Duplex WIA scan properties missing - powershell

Question

I can't access/find the duplex property / setting on my scanner via Powershell and via WIA 2.0 .
I 've installed the correct drivers but it seems, that alot of properties are missing (see below).
Am I reading from the wrong device properties? -> device.Properties["Document Handling Select"] = 5 (found here WIA 2.0 Duplex scanning ).
The scanner scans both pages in 1 turn (double-sided scan).
Tried several "fixes" of other questions, including calling the image item.transfer twice - doesn't provide the backpage though.
What works:
Everything, including scanning a page and saving it into a .tiff file
What doesn't work:
Duplex - I 've searched millions of sites, WIA 2.0 documentation, but I can't seem to find the right property to set the device.Properties["Document Handling Select"] = 5 (found here WIA 2.0 Duplex scanning )
The Scanner is Duplex and works with duplex in every standard scan setting
Powershell snippet
While ($true) {
"in While"
Try{
$deviceManager = new-object -ComObject WIA.DeviceManager
"Devices: " + $deviceManager.DeviceInfos.Count()
$device = $deviceManager.DeviceInfos.Item(1).Connect()
} catch {
"while break"
$error
break
}
$x = 1
while ($x -lt 17){
$device.Properties($x)
$x = $x + 1
}
$imageProcess = new-object -ComObject WIA.ImageProcess
$wiaFormatTIFF = "{B96B3CB1-0728-11D3-9D7B-0000F81EF32E}"
foreach ($item in $device.Items) {
"device items: " + $device.Items.Count
$image = $item.Transfer($wiaFormatTIFF)
$imageback = $item.Transfer($wiaFormatTIFF)
Property output
Properties output of Powershell device properties over USB:
Name : User Name
PropertyID : 3112
Type : 16
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : Root
Name : Item Name
PropertyID : 4098
Type : 16
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : 0001\Root
Name : Full Item Name
PropertyID : 4099
Type : 16
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : 76
Name : Item Flags
PropertyID : 4101
Type : 5
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : {6BDD1FC6-810F-11D0-BEC7-08002BE2092F}\0001
Name : Unique Device ID
PropertyID : 2
Type : 16
IsReadOnly : False
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : CANON
Name : Manufacturer
PropertyID : 3
Type : 16
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : CANON DR-M140 USB
Name : Description
PropertyID : 4
Type : 16
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : 65536
Name : Type
PropertyID : 5
Type : 5
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : \\.\Usbscan4
Name : Port
PropertyID : 6
Type : 16
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : CANON DR-M140 USB
Name : Name
PropertyID : 7
Type : 16
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : local
Name : Server
PropertyID : 8
Type : 16
IsReadOnly : False
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value :
Name : Remote Device ID
PropertyID : 9
Type : 16
IsReadOnly : False
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : {B763D1FD-94C8-4ef6-B5E8-E7F3086CF161}
Name : UI Class ID
PropertyID : 10
Type : 16
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : 0
Name : Hardware Configuration
PropertyID : 11
Type : 5
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value :
Name : BaudRate
PropertyID : 12
Type : 16
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
Value : 19
Name : STI Generic Capabilities
PropertyID : 13
Type : 5
IsReadOnly : True
IsVector : False
SubType : 0
SubTypeDefault :
SubTypeValues :
SubTypeMin :
SubTypeMax :
SubTypeStep :
device items: 1

Answer 1

Okay, actually the scanner didn't have the property for duplex, while beeing duplex.
Tried it with another scanner and with that property it works.
Try {
"device items: " + $device.Items.Count
$device.Properties["3088"].Value = 5 <--- Duplex property 5, ID 3088
$device.Properties["3087"].Value
$imageback = $item.Transfer($wiaFormatTIFF)
} catch {
"while break"
$error
$killwhile = 1
break
}