function Send-TelegramTextMessage {
    [CmdletBinding()]
    Param
    (
        [Parameter(Mandatory = $true,
            HelpMessage = '#########:xxxxxxx-xxxxxxxxxxxxxxxxxxxxxxxxxxx')]
        [ValidateNotNull()]
        [ValidateNotNullOrEmpty()]
        [string]$BotToken, #you could set a token right here if you wanted
        [Parameter(Mandatory = $true,
            HelpMessage = '-#########')]
        [ValidateNotNull()]
        [ValidateNotNullOrEmpty()]
        [string]$ChatID, #you could set a Chat ID right here if you wanted
        [Parameter(Mandatory = $true,
            HelpMessage = 'Text of the message to be sent')]
        [ValidateNotNull()]
        [ValidateNotNullOrEmpty()]
        [string]$Message,
        [Parameter(Mandatory = $false,
            HelpMessage = 'HTML vs Markdown for message formatting')]
        [ValidateSet("Markdown", "HTML")]
        [string]$ParseMode = "Markdown", #set to Markdown by default
        [Parameter(Mandatory = $false,
            HelpMessage = 'Disables link previews')]
        [bool]$Preview = $false, #set to false by default
        [Parameter(Mandatory = $false,
            HelpMessage = 'Sends the message silently')]
        [bool]$Notification = $false #set to false by default
    )
    #------------------------------------------------------------------------
    $results = $true #assume the best
    #------------------------------------------------------------------------
    $payload = @{
        "chat_id"                   = $ChatID;
        "text"                      = $Message
        "parse_mode"                = $ParseMode;
        "disable_web_page_preview"  = $Preview;
        "disable_notification"      = $Notification
    }#payload
    #------------------------------------------------------------------------
    try {
        Write-Verbose -Message "Sending message..."
        $eval = Invoke-RestMethod `
            -Uri ("https://api.telegram.org/bot{0}/sendMessage" -f $BotToken) `
            -Method post `
            -ContentType "application/json" `
            -Body (ConvertTo-Json -Compress -InputObject $payload) `
            -ErrorAction Stop
        if (!($eval.ok -eq "True")) {
            Write-Warning -Message "Message did not send successfully"
            $results = $false
        }#if_StatusDescription
    }#try_messageSend
    catch {
        Write-Warning "An error was encountered sending the Telegram message:"
        Write-Error $_
        $results = $false
    }#catch_messageSend
    return $results
    #------------------------------------------------------------------------
}#function_Send-TelegramTextMessage


## Esto tiene que estar habilitado para que funcione en powershell 4 ##
[Net.ServicePointManager]::SecurityProtocol = "tls12, tls11, tls"

$partitions= Get-WmiObject -Class Win32_LogicalDisk -Filter 'DriveType = 3' |Select-Object PSComputerName, Caption,@{N='Capacity_GB'; E={[math]::Round(($_.Size / 1GB), 2)}},@{N='FreeSpace_GB'; E={[math]::Round(($_.FreeSpace / 1GB), 2)}},@{N='PercentUsed'; E={[math]::Round(((($_.Size - $_.FreeSpace) / $_.Size) * 100), 2) }},@{N='PercentFree'; E={[math]::Round((($_.FreeSpace / $_.Size) * 100), 2) }}

## Ingreso a cada disco del sistema ## 
foreach($z in $partitions)
{  
    #Write-Host "Particion         : $($z.Caption)" ;    
    #Write-Host "Capacidad Total   : $($z.Capacity_GB)  GB" ;    
    #Write-Host "Espacio Libre     : $($z.FreeSpace_GB) GB" ; 
    #Write-Host "Porcentaje Usado  : $($z.PercentUsed)  %" ;    
    #Write-Host "Porcentaje Libre  : $($z.PercentFree)  %" ;   
    #Write-Host "";   

## Nombre del Equipo ##
$mira= get-content env:computername

## IPs de la maquina ##
$ip= (Get-WmiObject Win32_NetworkAdapterConfiguration | ? {$_.IPAddress -ne $null}).ipaddress

## Tamaño y porcentaje real de cada disco ##
$porci= $z.PercentFree
$size= $z.FreeSpace_GB

## Tamaño y porcentaje, en el que quiero que envie el alerta. ##
$Porciento= "15"
$tamaño= "15"

## Token del Bot Telegram y ChatID ##
$bot= "1185443058:AAE-gfS2UxxnSDt-xI-LdaCvHXf-c56M2tk"
$chat= "-420922357"

## test de información que arroja ##
#Write-Host $porci
#Write-Host $size
#Write-Host $porci
#Write-Host $mira

if ( $porci -le $Porciento ) {
    if ( $size -le $tamaño ) {
                Send-TelegramTextMessage -BotToken $bot -ChatID $chat -Message "Alerta el espacio en disco de $mira $ip es $porci % $size GB "
        }
    }
}