@echo off
title Reset Scale Port (release stuck COM port)
:: --- Self-elevate to Administrator (needed to reset the USB device) ---
net session >nul 2>&1
if %errorLevel% neq 0 (
    echo Requesting administrator rights...
    powershell -NoProfile -Command "Start-Process -FilePath '%~f0' -Verb RunAs"
    exit /b
)

echo ============================================
echo    Releasing / resetting the scale port
echo ============================================
echo.
echo  This disables and re-enables the USB-serial
echo  scale adapter, which frees the COM port even
echo  if another app/tab is holding it.
echo.

powershell -NoProfile -ExecutionPolicy Bypass -Command ^
  "$d = Get-PnpDevice -Class Ports -PresentOnly | Where-Object { $_.FriendlyName -match 'CH340|CH341|USB-SERIAL|USB Serial|CP210|FT232|FTDI|Prolific|PL2303|WCH' };" ^
  "if (-not $d) { Write-Host 'No USB-serial scale adapter found. Make sure the scale is plugged in.'; }" ^
  "foreach ($x in $d) {" ^
  "  Write-Host ('Resetting: ' + $x.FriendlyName + ' (' + $x.InstanceId + ')');" ^
  "  Disable-PnpDevice -InstanceId $x.InstanceId -Confirm:$false -ErrorAction SilentlyContinue;" ^
  "  Start-Sleep -Milliseconds 1000;" ^
  "  Enable-PnpDevice  -InstanceId $x.InstanceId -Confirm:$false -ErrorAction SilentlyContinue;" ^
  "  Write-Host '  -> released and re-enabled.';" ^
  "}"

echo.
echo Done. Wait ~3 seconds, then go back to the web app and click "Connect Scale".
echo.
pause