Seeing 2 devices when there's only 1 connected on windows/linux+libusb about emokit

[ozancaglayan]

That is because there are two interfaces in the dongle (They appear as hidraw0, hidraw1 for example). Looking to your udev rule it seems that you are interested in the first one which is called "Emotiv RAW DATA". So we can filter out all other interfaces except that. Am I wrong?

[qdot]

The udev rule is broken in multiple ways right now. It's set up for the first python libraries we had, which assumed daemons and what not to exist on the system. Even so, we should be able to do something smarter now that we're on hidapi.

[wijjj]

I guess this is not 100% the same issue, but still...

Using ubuntu11 (installed all dependencies, mcrypt, cmake, hidapi w/o problems) I get two devices, but running e.g. contact I get CANNOT CONNECT: -3 (E_EMOKIT_NOT_OPENED). I added some output within emokit_open for now. This shows up when I run contact now:

Current epoc devices conneted: 2

opening dev: 1 (device_index)
path: /dev/hidraw0 (device_cur->path)
path: /dev/hidraw1

opening dev: 0
path: /dev/hidraw0
CANNOT CONNECT: -3

BTW: everything works fine in windows, using emokit-java.

[olorin]

I have a working version of the udev rules working with epocd on my other laptop; now that epocd's been incorporated into master I'll look into integrating my changes and getting device selection working (I'm at pyconau at the moment, so it'll be a couple of days).

[soltanmm]

I realize that I'm perpetuating an off-topic discussion, but...

@wijjj: have you checked that you have read permissions on hidraw? I had the same problem, stepped through the debugger, and found I lacked permissions for a call to open() in the hid library. Try cat-ting on the /dev/hidraw file as a check or run with sudo... might help.