Powershell Baud Detector

detect_baud.ps1

Write-Output "Available COM ports: "
[System.IO.Ports.SerialPort]::getportnames()

$Global:portName = "COM5"

Function TryBaud($rate)
{
    $port= new-Object System.IO.Ports.SerialPort $Global:portName,$rate,None,8,one
    $port.open()
    $port.ReadTimeout = 1000
    $port.WriteLine("help")

    try
    {
        $s = $port.ReadLine()
        Write-Output "String read: <<$s>>"
    }
    catch {}
    
    $port.Close()
}

$baudRates = (110, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200, 128000, 256000, 460800)
foreach ($r in $baudRates)
{
    Write-Output "Trying: $r"
    TryBaud $r
}