Talk GPIO via Powershell Core

GPIO.ps1

function Open-GPIOPin ([int]$Pin,[ValidateSet('in','out')][string]$Mode) {
    [string]$Pin | Out-File -FilePath "/sys/class/gpio/export" -NoNewline
    $Mode | Out-File -FilePath "/sys/class/gpio/gpio$Pin/direction" -NoNewline
}

function Send-GPIOBit ([int]$Pin,[ValidateRange(0,1)][int]$Bit) {
    $Bit | Out-File -FilePath "/sys/class/gpio/gpio$Pin/value" -NoNewline
}

function Receive-GPIOBit ([int]$Pin) {
    return (Get-Content -Path "/sys/class/gpio/gpio$Pin/value")
}

function Close-GPIOPin ([int]$Pin,[ValidateSet('in','out')][string]$Mode) {
    [string]$Pin | Out-File -FilePath "/sys/class/gpio/unexport" -NoNewline
}