If you're using a RS232-USB adapter, PyUSB may not work, as the other driver
is likely blocking.
Additionally, the "pyserial" library may be of more use, sparing you a layer
of abstraction.
On Wed, Jul 27, 2011 at 15:58, David Brunnthaler <da...@i-am-alive.at>wrote:
> Thanks for your replies.
>
> First of all: I'm using the official drivers from that RS232 <-> USB
> adapter (http://www.ftdichip.com/Drivers/D2XX.htm)
>
> I monitored the USB transfer with wireshark and you can see part of the
> compressed output here:
> http://pastebin.com/4jf79vGQ
>
> And if you want you can also have a look at the full file:
> http://dl.i-am-alive.at/wireshark_full.txt
>
> Correct me if I'm wrong:
> What that tells me is that my endpoint adress is either 0x82 or 0x01.
> The length is most of the time 64. So is assume that this is my
> "nrByteRead"
>
> Can someone look at the logs and tell me if I'm right or wrong? I think I
> may still use the wrong "bConfigurationValue"..
>
> Thanks in advance
> David
>
>
>
> Am 27.07.11 16:20, schrieb Ian Daniher:
>
> Have you monitored a USB transfer with the scale using its original driver?
> I suggest the 'usbmon' kernel module. Use Wine or a VM if it's a
> windows-only app.
>
> On Wed, Jul 27, 2011 at 08:10, David Brunnthaler <da...@i-am-alive.at>wrote:
>
>> Hello,
>>
>> I'm right now trying to get pyUSB to read from my usb-scale but i'm
>> running into some issues there.
>>
>> My python code: http://paste.pound-python.org/show/10095/
>> and my output: http://paste.pound-python.org/show/10096/
>>
>> As you can see, it just stops at line 49 of the code.
>>
>>
>> In the Tutorial (
>> http://pyusb.sourceforge.net/docs/1.0/tutorial.html#how-am-i-supposed-to-work)
>> it says you first have to issue a "set_configuration" request.
>>
>> I tried all three different methods (line 31, line 33 and lines 35 to 37)
>> but it always tells me: http://paste.pound-python.org/show/10097/
>>
>>
>> Any idea what I'm doing wrong, or how I can establish a successful
>> connection?
>>
>> Thanks in advance
>> David
>>
>> --
>> david brunnthaler
>> da...@i-am-alive.at
>> austria
>>
>>
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>
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> david brunnthaler
>
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