PowerShell 技能连载 - IoT边缘设备监控

在工业物联网场景中,边缘设备监控至关重要。以下脚本实现设备状态采集与异常预警:

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function Get-IoTDeviceStatus {
[CmdletBinding()]
param(
[Parameter(Mandatory=$true)]
[string[]]$DeviceIPs,

[ValidateRange(1,100)]
[int]$SamplingInterval = 30
)

$report = [PSCustomObject]@{
Timestamp = Get-Date
OnlineDevices = @()
OfflineDevices = @()
HighTempDevices = @()
LowBatteryDevices = @()
}

try {
# 设备状态轮询
$DeviceIPs | ForEach-Object -Parallel {
$response = Test-NetConnection -ComputerName $_ -Port 502 -InformationLevel Quiet
$telemetry = Invoke-RestMethod -Uri "http://$_/metrics" -TimeoutSec 3

[PSCustomObject]@{
IP = $_
Online = $response
Temperature = $telemetry.temp
BatteryLevel = $telemetry.battery
LastSeen = Get-Date
}
} -ThrottleLimit 10

# 数据分析
$results | ForEach-Object {
if(-not $_.Online) {
$report.OfflineDevices += $_.IP
continue
}

$report.OnlineDevices += $_.IP

if($_.Temperature -gt 85) {
$report.HighTempDevices += $_.IP
}

if($_.BatteryLevel -lt 20) {
$report.LowBatteryDevices += $_.IP
}
}

# 触发预警
if($report.HighTempDevices.Count -gt 0) {
Send-Notification -Type "HighTemp" -Devices $report.HighTempDevices
}

if($report.LowBatteryDevices.Count -gt 0) {
Send-Notification -Type "LowBattery" -Devices $report.LowBatteryDevices
}
}
catch {
Write-Warning "设备监控异常: $_"
}

return $report
}

实现原理:

  1. 使用并行处理加速多设备状态采集
  2. 通过Test-NetConnection验证设备在线状态
  3. 调用REST API获取设备遥测数据
  4. 设置温度(85°C)和电量(20%)双重预警阈值
  5. 自动触发邮件/短信通知机制

使用示例:

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$devices = '192.168.1.100','192.168.1.101','192.168.1.102'
Get-IoTDeviceStatus -DeviceIPs $devices -SamplingInterval 60

最佳实践:

  1. 与TSDB时序数据库集成存储历史数据
  2. 配置指数退避策略应对网络波动
  3. 添加设备白名单安全机制
  4. 实现预警静默时段功能

注意事项:
• 需要设备开放502端口和/metrics端点
• 建议使用硬件加密模块保护通信安全
• 监控间隔不宜小于30秒

PowerShell 技能连载 - IoT边缘设备监控

http://blog.vichamp.com/2024/09/11/powershell-iot-monitoring/

作者

吴波

发布于

2024-09-11

更新于

2025-03-25

许可协议

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