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Hello,
I'm creating a program which can measure your responsetime. It's for a friend, so he can train for his athletics. It's now measured by a press on space, but he wants to measure it with his Logitech Formula racepedals. It's connected to the computer with an USB-cable. I haven't got any experience with com/usb ports, so how can I communicate with that thing?
If they're gaming devices, then they'll appear as analog game-controllers. You're going to have to search for "How do I read a Joystick Axis value in VB.NET?" or create/rename your post to that effect.
Check the control panel of Windows under Gaming Devices and see if they're in there.
if they just use plain old serial communication, then you may be able to do it because some USB devices do just use standard serial communication. Others however use specialized drivers, and proprietary methods of transmitting data.
I *think* the way you can tell this, is if the USB devices is assigned a COM port or not. I don't have a ton of experience with this, only that I tried once to intercept my USB xbox 360 controller when using it (so I could use it like a mouse in a program I was building) but the controller isn't assigned a port number and it also has its own driver.
Since these are gaming pedals, it is also possible that you could maybe use directX to query the input from the gaming device.