I'm running Windows 7. I can get a bit of information about the device
from the test program of libusb, if that would be helpful for you. I'm
having a bit of trouble understanding how to use the debug feature. When I
type "export PYUSB_DEBUG_LEVEL=debug" into the Python command line, I get
an error message with "invalid syntax."
On Wed, Jul 17, 2013 at 2:33 PM, Elizabeth Tolman <etol...@princeton.edu>wrote:
> Hello,
>
> I'm new to pyusb and to working with usb devices in general. I'm trying
> to read voltage data from a Tenma 72-7732 multimeter, but I'm having some
> problems. This is my code so far:
>
> def main():
> import usb.core
> import usb.util
> import usb.backend
>
> #find device
>
> dev = usb.core.find(idVendor=0x1a86, idProduct=0xe008)
>
> # did you find it?
> if dev is None:
> raise ValueError('Device not found')
> else:
> print "Device found"
>
>
> dev.set_configuration()
>
>
> endpoint = dev[0][(0,0)][0]
>
>
> data = dev.read(endpoint.bEndpointAddress, endpoint.wMaxPacketSize, 0,
> 100000)
>
> print data
>
>
> main()
>
>
> This finds the device, but gives a timeout error when it tries to read
> data. Do you have any idea what might have gone wrong? The multimeter has
> very poor documentation, so I can't go there for advice.
>
> Thanks,
> Libby
>
------------------------------------------------------------------------------
See everything from the browser to the database with AppDynamics
Get end-to-end visibility with application monitoring from AppDynamics
Isolate bottlenecks and diagnose root cause in seconds.
Start your free trial of AppDynamics Pro today!
http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk
_______________________________________________
pyusb-users mailing list
pyusb-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/pyusb-users