Energieverwaltung von Netzwerkadaptern und USB Root Hub

[t.roller]

Mit devcon.exe kann man die Devices kontrollieren.

Note: To change the status or configuration of a device, you must be a member of the Administrators group on the computer.

Beispiele:

Delphi-Quellcode:

function GetConsoleOutput(Command : string;
         Output, Errors : TStringList) : Boolean;
var
  Buffer            : array[0..255] of Char;
  CreationFlags     : DWORD;
  NumberOfBytesRead : DWORD;
  PipeErrorsRead    : THandle;
  PipeErrorsWrite   : THandle;
  PipeOutputRead    : THandle;
  PipeOutputWrite   : THandle;
  ProcessInfo       : TProcessInformation;
  SecurityAttr      : TSecurityAttributes;
  StartupInfo       : TStartupInfo;
  Stream            : TMemoryStream;
begin
  //Initialisierung ProcessInfo
  FillChar(ProcessInfo, SizeOf(TProcessInformation), 0);

  //Initialisierung SecurityAttr
  FillChar(SecurityAttr, SizeOf(TSecurityAttributes), 0);
  SecurityAttr.nLength              := SizeOf(TSecurityAttributes);
  SecurityAttr.bInheritHandle       := True;
  SecurityAttr.lpSecurityDescriptor := nil;

  //Pipes erzeugen
  CreatePipe(PipeOutputRead, PipeOutputWrite, @SecurityAttr, 0);
  CreatePipe(PipeErrorsRead, PipeErrorsWrite, @SecurityAttr, 0);

  //Initialisierung StartupInfo
  FillChar(StartupInfo, SizeOf(TStartupInfo), 0);
  StartupInfo.cb          := SizeOf(TStartupInfo);
  StartupInfo.hStdInput   := 0;
  StartupInfo.hStdOutput  := PipeOutputWrite;
  StartupInfo.hStdError   := PipeErrorsWrite;
  StartupInfo.wShowWindow := SW_HIDE;
  StartupInfo.dwFlags     := STARTF_USESHOWWINDOW or STARTF_USESTDHANDLES;

  CreationFlags := CREATE_DEFAULT_ERROR_MODE or
                   CREATE_NEW_CONSOLE or
                   NORMAL_PRIORITY_CLASS;

  // Folgende Zeile ist nur für Delphi ab 2009 erforderlich:
  UniqueString(Command);

  if CreateProcess(nil,
                   PChar(Command),
                   nil,
                   nil,
                   True,
                   CreationFlags,
                   nil,
                   nil,
                   StartupInfo,
                   ProcessInfo) then
  begin
    Result := True;
    //Write-Pipes schließen
    CloseHandle(PipeOutputWrite);
    CloseHandle(PipeErrorsWrite);

    //Ausgabe Read-Pipe auslesen
    Stream := TMemoryStream.Create;
    try
      while ReadFile(PipeOutputRead, Buffer, 255, NumberOfBytesRead, nil) do
      begin
         Stream.Write(Buffer, NumberOfBytesRead);
      end;
      OEMToAnsiBuff(Stream.Memory, Stream.Memory, Stream.Size);  //<--------------
      Stream.Position := 0;
      Output.LoadFromStream(Stream);
    finally
      Stream.Free;
    end;
    CloseHandle(PipeOutputRead);

    //Fehler Read-Pipe auslesen
    Stream := TMemoryStream.Create;
    try
      while ReadFile(PipeErrorsRead, Buffer, 255, NumberOfBytesRead, nil) do
      begin
         Stream.Write(Buffer, NumberOfBytesRead);
      end;
      OEMToAnsiBuff(Stream.Memory, Stream.Memory, Stream.Size);          
      Stream.Position := 0;
      Errors.LoadFromStream(Stream);
    finally
      Stream.Free;
    end;
    CloseHandle(PipeErrorsRead);

    WaitForSingleObject(ProcessInfo.hProcess, INFINITE);
    CloseHandle(ProcessInfo.hProcess);
  end
  else
  begin
    Result := False;
    CloseHandle(PipeOutputRead);
    CloseHandle(PipeOutputWrite);
    CloseHandle(PipeErrorsRead);
    CloseHandle(PipeErrorsWrite);
  end;
end;

procedure TForm2.Button1Click(Sender: TObject);
var
  Output : TStringList;
  Errors : TStringList;
begin
  Output := TStringList.Create;
  Errors := TStringList.Create;
  Memo1.Lines.Add('----------------------USB OFF---------------------');
  try
    if GetConsoleOutput('devcon.exe disable USB\ROOT_HUB20', Output, Errors)  // USB 2.0
    then Memo1.Lines.AddStrings(Output); Memo1.Lines.Add('');
    if GetConsoleOutput('devcon.exe disable USB\ROOT_HUB30', Output, Errors)  // USB 3.0
    then Memo1.Lines.AddStrings(Output);
  finally
    Output.free;
    Errors.free;
  end;
end;

procedure TForm2.Button2Click(Sender: TObject);
var
  Output : TStringList;
  Errors : TStringList;
begin
  Output := TStringList.Create;
  Errors := TStringList.Create;
  Memo1.Lines.Add('----------------------USB ON----------------------');
  try
    if GetConsoleOutput('devcon.exe enable USB\ROOT_HUB20', Output, Errors) // USB 2.0
    then Memo1.Lines.AddStrings(Output); Memo1.Lines.Add('');
    if GetConsoleOutput('devcon.exe enable USB\ROOT_HUB30', Output, Errors) // USB 3.0
    then Memo1.Lines.AddStrings(Output);
  finally
    Output.free;
    Errors.free;
  end;
end;

Einen Energieeffizienzdiagnose-Bericht bekommt man damit:
powercfg energy
(Administrator-Rechte erforderlich)
Mit powercfg.exe kann man sehr viel machen.
WMI hast Du selbst schon erwähnt.