Error using powershell.exe: 'Select-Object' is not recognized

I want to get information about serial ports via the powershell.

I got the results i want, when I write some line of code in command Window:

system("powershell")

Windows PowerShell

Copyright (C) Microsoft Corporation. All rights reserved.

PS C:\Users\> Get-CimInstance -Class Win32_SerialPort | Select-Object Name, Description, DeviceID, PNPDeviceID

Get-CimInstance -Class Win32_SerialPort | Select-Object Name, Description, DeviceID, PNPDeviceID

Name Description DeviceID PNPDeviceID

---- ----------- -------- -----------

Arduino Uno (COM4) Arduino Uno COM4 USB\VID_2341&PID_0043\55737313331351A00212

Arduino Micro (COM38) Arduino Micro COM38 USB\VID_2341&PID_8037&MI_00\7&2D66C3B6&0&0000

PS C:\Users\> exit

But when I run the same commands in a single line or as function, i get an error:

>> system("powershell Get-CimInstance -Class Win32_SerialPort | Select-Object Name, Description, DeviceID, PNPDeviceID")

'Select-Object' is not recognized as an internal or external command,

operable program or batch file.

I think that the second part of the command (after the | ) is not executed in the powershell but in the cmd. How can I solve this?

[inl1ner]

In PowerShell funktioniert es so:

$GetPort = Get-CimInstance -ClassName Win32_PNPEntity |

Select-Object -Property Caption, $StatusInfo

Write-Host $GetPort

@{Name=Kommunikationsanschluss (COM1); Description=Kommunikationsanschluss; DeviceID=COM1; PNPDeviceID=ACPI\PNP0501\0}