Windows 定时任务重连 wifi

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由于笔记本长期处于盒盖状态，wifi 可能会断，所以考虑使用定时任务自动重连。

首先创建 C:\Users\Public\my\wifi\wifi-check.ps1，需要修改 wifi 名称，并手动连接过。

$ssid = "xxx"
$checkInterval = 60
$keepDays = 7
$logDir = "C:\Users\Public\my\logs"
$logFile = Join-Path $logDir "wifi-check.log"

if (-not (Test-Path $logDir)) {
    New-Item -ItemType Directory -Path $logDir -Force | Out-Null
}

if (Test-Path $logFile) {
    $lastWrite = (Get-Item $logFile).LastWriteTime
    if ($lastWrite -lt (Get-Date).AddDays(-$keepDays)) {
        Clear-Content $logFile
    }
}

function Write-Log {
    param ([string]$msg)

    $time = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
    $line = "[$time] $msg"

    Write-Host $line
    Add-Content -Path $logFile -Value $line
}

Write-Log "WiFi auto-check script started (keeping logs for $keepDays days)"

while ($true) {

    Write-Log "Checking network connectivity (baidu.com)"
    $ping = Test-Connection -ComputerName "baidu.com" -Count 2 -Quiet

    if (-not $ping) {
        Write-Log "Cannot reach baidu.com, trying to connect to WiFi: $ssid"

        $profiles = netsh wlan show profiles | Select-String $ssid
        if ($profiles) {
            netsh wlan connect name="$ssid" | Out-Null
            Write-Log "Attempted to connect to WiFi: $ssid"
        } else {
            Write-Log "WiFi profile '$ssid' does not exist. Please connect once manually."
        }

    } else {
        Write-Log "Network is OK"
    }

    Start-Sleep -Seconds $checkInterval
}

手动运行测试：

powershell -NoProfile -ExecutionPolicy Bypass -File C:\Users\Public\my\wifi\wifi-check.ps1

手动运行没有异常就可以将其添加为定时任务，在系统启动时执行。

# 创建 SYSTEM 用户开机启动任务，后台运行
schtasks /create /f `
  /sc onstart `
  /ru SYSTEM `
  /rl highest `
  /tn "WiFi-Auto-Reconnect" `
  /tr "powershell.exe -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -File C:\Users\Public\my\wifi\wifi-check.ps1"

其他命令：

# 查看任务状态
schtasks /query /tn "WiFi-Auto-Reconnect" /v /fo LIST

# 删除旧任务（如果存在）
schtasks /delete /tn "WiFi-Auto-Reconnect" /f

# 立即运行一次
schtasks /run /tn "WiFi-Auto-Reconnect"