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How to configure power settings in Windows

In this post we will take a look at the recommended power settings in Windows for the RFID reader to maintain consistent connection without disruptions.

Set power settings to never sleep

idemeum desktop software constantly communicates with RFID reader, when it is connected to a shared workstation. It is important to maintain consistent connection between the reader and operating system. Therefore, we recommend to configure Windows power settings to not allow computer to go to sleep when plugged in.

  • Navigate to Control Panel and access Power Options
  • For the chosen plan click Change plan settings
  • Make sure computer is configured to never go to sleep. For example, this workstation is permanently powered, and we configured the settings to never go to sleep and turn off the display when Plugged in.

Disable USB Selective Suspend

The USB selective suspend feature allows the hub driver to suspend an individual port without affecting the operation of the other ports on the hub.

It is clear that USB selective suspend has immense benefits on your PC’s battery life. However, there are instances when the setting causes some USB devices to freeze or become unresponsive—mainly when your PC stays idle for too long. USB selective suspend is enabled by default on all Windows devices. Disabling USB selective suspend is an effective troubleshooting solution that can resolve RFID reader disconnects.

As a result, we recommend disabling USB selective suspend on your workstaions where RFID readers are connected to.

Disable with command prompt

  • Open the Start Menu, type Command Prompt in the search bar, and choose Run as administrator from the right pane
  • Type the following commands in the elevated command prompt window and press Enter
powercfg /SETDCVALUEINDEX SCHEME_CURRENT 2a737441-1930-4402-8d77-b2bebba308a3 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 0
powercfg /SETACVALUEINDEX SCHEME_CURRENT 2a737441-1930-4402-8d77-b2bebba308a3 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 0

Disable with UI

  • Navigate to Control Panel and access Power Options
  • For the chosen plan click Change plan settings
  • Click Change advanced power settings
  • Expand USB settings and make sure uSB selective suspend is Disabled

USB power settings missing

It is possible that when you access your power plan settings, the USB Selective Suspend settings might be missing. You can enable this setting in the Windows registry.

  • Press Windows key + R. This will open Run. Alternatively, you can go to Start and search for Run.
  • In Run dialog box, type regedit and hit Enter.
  • On the left hand pane navigate to the following registry location
  • Now on the right hand pane right click on empty space and click on New and select DWORD (32-bit) Value
  • Rename the DWORD file as Attributes
  • Double-click on the file and change the Value Data to 2
  • Restart the PC

After you create this registry key and restart the computer, you will be able to access USB Selective Suspend settings in the power plan options.