The damn uses a USB to serial UART converter. You can skip pyUSB and use
pySERIAL on /dev/ttyUSB0.
Steve.
> On Oct 2, 2013, at 3:49 PM, ranzam ali <ryanzam2...@yahoo.com> wrote:
>
> hello frens,
>
> I am having problem trying to read the data from my digital multimeter
> http://www.appatech.com/upload/download/file11349831248683.pdf. Actually, I
> am using PyUSB to access the DMM But, I am only able to open the port not
> able to read anything. The kernel version I am using is Linux version
> 3.6.11+.
> The output of dmesg gives me this
> [ 351.020927] cp210x 1-1.2:1.0: device disconnected
> [ 353.563977] usb 1-1.2: new full-speed USB device number 5 using dwc_otg
> [ 353.666404] usb 1-1.2: New USB device found, idVendor=10c4, idProduct=ea60
> [ 353.666432] usb 1-1.2: New USB device strings: Mfr=1, Product=2,
> SerialNumber=3
> [ 353.666448] usb 1-1.2: Product: CP2102 USB to UART Bridge Controller
> [ 353.666462] usb 1-1.2: Manufacturer: Silicon Labs
> [ 353.666474] usb 1-1.2: SerialNumber: 0001
> [ 353.668672] cp210x 1-1.2:1.0: cp210x converter detected
> [ 353.764017] usb 1-1.2: reset full-speed USB device number 5 using dwc_otg
> [ 353.865753] usb 1-1.2: cp210x converter now attached to ttyUSB0
>
> The PyUSB code i used was:
> import usb.backend
> import usb.core
> import usb.util
>
> dev=usb.core.find(idVendor=0x10c4, idProduct=0xea60)
>
> 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(0x81, 0x0040, 0,0)
> print(data)
>
> Can anyone help me?
>
> I have also attached the log of the SnoopyPro.
>
> Thanks,
> -ryan(newbie)
>
> “Do you love your creator? Love your fellow-beings first.”
>
> <Capture-setup packet.PNG>
> <Capture1.PNG>
> <Capture2.PNG>
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