Hello Libby,
I don't know your device, but I suspect it is using BCD for the lower
nibble and some other info in the upper one.
Another hint the most significant bit could be a parity bit...
More samples could be helpfull...
BR, Jacques-D.
for h in ("31","34","b3","31","b5","31","31","b0","b
Hello,
You have to send the initialization code like
this: dev.ctrl_transfer(0x21,0x09,0,0x05,[96,9,0,0,3]). After that, the
device will constantly send reports every .012 seconds. Usually, these
reports contain no data and look like this: F0 00 00 00 00 00 00 00. Every
so often, it will send a
Elizabeth,
Why dont you update your code including the initialization code for your
instrument? It may be usuful in the future if somebody try to search the
list archives for help. Well, this is just a suggestion.
On Fri, Jul 19, 2013 at 4:30 PM, Elizabeth Tolman wrote:
> Thank you all so much f
Thank you all so much for your help! I can now get the multimeter to talk
to me. It turns out you have to send it a message before it will send you
reports. I'm still working on the best way to understand and record these
reports, though, so I may need more help later, but for now things are
goi
On Thu, Jul 18, 2013 at 9:40 PM, Elizabeth Tolman wrote:
>
> I don't know if this is helpful or not, but I have another software
> program that reads from this multimeter. I can't look at the source code
> because it's a .exe file, but I used USBlyzer to look at the requests it was
> sending acro
On Wed, Jul 17, 2013 at 8:33 PM, Elizabeth Tolman 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
>
2013/7/18 Elizabeth Tolman
>
> I don't know if this is helpful or not, but I have another software
> program that reads from this multimeter. I can't look at the source code
> because it's a .exe file, but I used USBlyzer to look at the requests it was
> sending across the USB cable once it found
1.2.6.0
On Thu, Jul 18, 2013 at 2:14 PM, Wander Lairson Costa <
wander.lair...@gmail.com> wrote:
> 2013/7/18 Elizabeth Tolman :
> > Yes, I just reinstalled it to make sure, but I still get the timeout
> error.
> >
>
> There is something very weird with your logs, which I could not
> reproduce he
2013/7/18 Elizabeth Tolman :
> Yes, I just reinstalled it to make sure, but I still get the timeout error.
>
There is something very weird with your logs, which I could not
reproduce here. The arguments values in the call to intr_read int the
backend don't make sense, although I tested in Linux. W
Yes, I just reinstalled it to make sure, but I still get the timeout error.
On Thu, Jul 18, 2013 at 1:46 AM, Wander Lairson Costa <
wander.lair...@gmail.com> wrote:
> Did you try the latest version on github [1] ?
>
> [1] https://github.com/walac/pyusb
>
> 2013/7/17 Elizabeth Tolman :
> > Thanks
Did you try the latest version on github [1] ?
[1] https://github.com/walac/pyusb
2013/7/17 Elizabeth Tolman :
> Thanks for helping me out! Here is all of the info about the device:
>
> bus-0/\\.\libusb0-0005--0x1a86-0xe008 1A86/E008
> - Manufacturer : WCH.CN
> - Product : USB to Serial
Thanks for helping me out! Here is all of the info about the device:
bus-0/\\.\libusb0-0005--0x1a86-0xe008 1A86/E008
- Manufacturer : WCH.CN
- Product : USB to Serial
wTotalLength: 41
bNumInterfaces: 1
bConfigurationValue: 1
iConfiguration: 4
bmAttributes
Darn it I just re-read and saw you are on Windows.
Try this instead :-)
set PYUSB_DEBUG_LEVEL=debug
python your_script.py
On Wed, Jul 17, 2013 at 8:47 AM, chris clark wrote:
> On Wed, Jul 17, 2013 at 7:58 AM, Elizabeth Tolman
> wrote:
>
>> I'm running Windows 7. I can get a bit o
2013/7/17 Elizabeth Tolman :
> 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" in
On Wed, Jul 17, 2013 at 7:58 AM, Elizabeth Tolman wrote:
> 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
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
2013/7/17 Elizabeth Tolman :
> 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
> impor
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.
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