“The semaphore timeout period has expired” error for USB connection

by

Okay, I am now connecting without the semaphore timeout problem.

If anyone reading ever encounters the same thing, I hope that this procedure works for you; but no promises; hey, it’s windows.

In my case this was Windows 7

I got a little hint from This page on eHow; not sure if that might help anyone or not.

So anyway, this was the simple twenty three step procedure that worked for me

  • Click on start button

  • Choose Control Panel

  • From Control Panel, choose Device Manger

  • From Device Manager, choose Universal Serial Bus Controllers

  • From Universal Serial Bus Controllers, click the little sideways triangle

  • I cannot predict what you’ll see on your computer, but on mine I get a long drop-down list

  • Begin the investigation to figure out which one of these members of this list is the culprit…

    • On each member of the drop-down list, right-click on the name

    • A list will open, choose Properties

    • Guesswork time: using the various tabs near the top of the resulting window which opens, make a guess if this is the USB adapter driver which is choking your stuff with semaphore timeouts

  • Once you have made the proper guess, then close the USB Root Hub Properties window (but leave the Device Manager window open).

  • Physically disonnect anything and everything from that USB hub.

  • Unplug it.

  • Return your mouse pointer to that USB Root Hub in the list which you identified earlier.

  • Right click again

  • Choose Uninstall

  • Let Windows do its thing

  • Wait a little while

  • Power Down the whole computer if you have the time; some say this is required. I think I got away without it.

  • Plug the USB hub back into a USB connector on the PC

  • If the list in the device manager blinks and does a few flash-bulbs, it’s okay.

  • Plug the BlueTooth connector back into the USB hub

  • Let windows do its thing some more

  • Within two minutes, I had a working COM port again, no semaphore timeouts.

Hope it works for anyone else who may be having a similar problem.

More Related Contents:

  1. Serial to USB cable from a scale to PC ,some values are just question marks
  2. Releasing a unplugged virtual Serial Port
  3. extract number out strings c# [closed]
  4. Get List of connected USB Devices
  5. SerialPort not receiving any data
  6. Throttling asynchronous tasks
  7. How to Read and Write from the Serial Port
  8. Getting Serial Port Information
  9. What is the correct way to read a serial port using .NET framework?
  10. C# GUI refresh and async serial port communication
  11. How to open a serial port by friendly name?
  12. Wait for response from the Serial Port and then send next data
  13. Serial Port Polling and Data handling
  14. How do I use dataReceived event of the SerialPort Port Object in C#?
  15. USB HID Devices
  16. Need to understand the usage of SemaphoreSlim
  17. I/O exception error when using serialport.open()
  18. Sign PDF with iTextSharp 5.3.3 and USB token
  19. Do I need to Dispose a SemaphoreSlim?
  20. Does SemaphoreSlim (.NET) prevent same thread from entering block?
  21. Finding information about all serial devices connected through USB in C#
  22. How to find available COM ports?
  23. How to detect using c# if a pendrive is plugged into a USB port?
  24. C# Async Serial Port Read
  25. Implementing a timeout on a function returning a value
  26. C# read only Serial port when data comes
  27. USB Device Connected
  28. How do I read input from a USB HID device?
  29. Memory barrier generators
  30. How to clear browser cache on browser back button click in MVC4?

Leave a Comment