Win: use PowerShell to check the strength of wireless signal

1、 Confirm the strength of the wireless signal being connected ：

netsh wlan show interfaces

   

    stay  PowerShell  in , Direct display of signal strength ：

(netsh wlan show interfaces) -Match '^\s+Signal' -Replace '^\s+Signal\s+:\s+',''

2、 When the connection signal is less than or equal to 30%, Then a pop-up window will be displayed in the notification bar ：

   $cur_strength=(netsh wlan show interfaces) -Match '^\s+Signal' -Replace '^\s+Signal\s+:\s+','' | Out-String

   If ($cur_strength.replace('%','') –le 30)

   {

     Add-Type -AssemblyName System.Windows.Forms

     $global:balmsg = New-Object System.Windows.Forms.NotifyIcon

     $path = (Get-Process -id $pid).Path

     $balmsg.Icon = [System.Drawing.Icon]::ExtractAssociatedIcon($path)