The module System.IO.Ports.Commands provides serial ports as a resource. It thus allows you to quickly and easily send and receive data via such a resource. In addition, monitoring is included that provides a DataReceived event as a Powershell event as soon as the resource receives data.

The System.IO.Ports.Commands module contains cmdlets for controlling serial ports. The module uses the classes and enumerations of the namepace System.IO.Ports, which simplify the control of serial ports, e.g. handshake, parity, SerialPinChange, and StopBits. The most important class, is the SerialPort class. It provides a framework for synchronous and event-driven I/O operations, access to pin and interrupt states, and access to the driver properties for the serial port.

The module requires .NET and PowerShell. The following versions are supported:

To install and run this module, copy the folder with the name System.IO.Ports.Commands in one of the appropriate PowerShell paths and use Import-Module -name System.IO.Ports.Commands.

The paths where you can install this module are in the $env:PSModulePath global variable. For example, a common path to store a module on a system would be %SystemRoot%/users/<user>/Documents/PowerShell/Modules/<moduleName>. Be sure to create a directory for this module that uses the same name System.IO.Ports.Commands as the script module. If you did not save this module in one of these paths, you must specify the location of the module in the Import-Module command. Otherwise, PowerShell would not be able to find the module.

Starting with PowerShell, if you've placed this module in one of the PowerShell module paths, you don't need to explicitly import it. This module is automatically loaded when a user calls a function of the module. For more information about the module path, see Importing a PowerShell Module and Modifying the PSModulePath Installation Path.

To remove this module from active service in the current PowerShell session, use Remove-Module -name System.IO.Ports.Commands.

In this example we output the phrase "Hello World!" to the SerialPort COM3 and wait for a response. Then we read the data. Finally, we close the SerialPort so that it is available again.

# Loading the powershell module
Import-Module System.IO.Ports.Commands

# Opens the serialport COM3
$SerialPort = Open-SerialPort -portName COM3

# Write data to serialport
Write-SerialPort -InputObject $SerialPort -Text "Hello World!"

# Wait max. 3 seconds for a response
Wait-DataReceivedEvent -InputObject $SerialPort -Timeout 3

# Read all existing data from serialport
Read-SerialPort -InputObject $SerialPort -Existing

# Closes the serialport COM3
Close-SerialPort -InputObject $SerialPort

Output:
Hello back!

• Adaptation to the new internal standard of a script module.
• The creation of a german external help file.

The module uses enumerations and classes of the namepace [System.IO.Ports].

• System.IO.Ports Namespace | Microsoft Docs