Using several optical USB mice for distance measuring

[Rainer Ehrt]

Hi folks,
I want to connect several (maximal 100) optical mice via USB interface
to one computer and track their movements.
Has anybody any experience connecting several identical devices on a
computer and how to distinguish them from each other programaticly?

Ciao,
Rainer

[Aaron Marks]

I think windows might make registry entries for the USB devices. Probably somewhere under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet . Maybe you can access data from there. Other than that, I know that the device enumeration happens in the low level USB bus drivers. I don't know if there is any way for you to access it.

[Pawel Pocwiardowski]

I am not sure but think that USB will not provide with 100
devices support. there is some limmitation but I do not remember
how many, shoot is 25.

PP

[DavidS!]

Hi Rainer,
I just ran into the same problem as you did 2 years ago. I would like to connect optical usb mice and use them as a motion tracking system. have you found a way to realise this system? I have same problems communicating with the usb-port and don't know to much about usb protocolls. I'd really appreciate if you could pass on some information.
Thanks for your help.
David