trying to get tagid from usb rfid reader

[ozsuakin]

Hi, everyone

i am trying to get tag id from usb rfid readers. But the problem is two of them has same vendor id and device id.

I am getting tagid from one of them by using pyusb.

is it possible to change vendor or device id? or any other solution.

Best regards

[davef21370]

I'm not sure how to use the Device ID's but they're different for each device, according to the image you posted one's 7 and the other's 8.

Dave.

[ozsuakin]

No, not different, also on windows 7, same vendor and device id appears. Do u think can I seperate the devices by their USB name?

Bus 001 Device 009: ID 08ff:0009 AuthenTec, Inc.
Bus 001 Device 007: ID 08ff:0009 AuthenTec, Inc.

[DougieLawson]

Take a look at the output from
lsusb -s 001:007 -v
lsusb -s 001:009 -v

Do you get a unique "iSerial" number for each reader?

[ozsuakin]

Both are :
iProduct 2
iSerial 3

I think i have to find another way, except pyusb

[DougieLawson]

Is there anything in the USB device profile that uniquely identifies each device (apart from the bus ID which can change on the next reboot).

[ozsuakin]

this is the device, every specifications are same. we have to handle it in python script

[ozsuakin]

Is there anything in the USB device profile that uniquely identifies each device (apart from the bus ID which can change on the next reboot).

ok. I found the solution.

we can resolve by using library evdev library of python.
serial and urllib2 is extra

Code: Select all

from evdev import InputDevice, list_devices, categorize, ecodes
from select import select
import urllib2
import serial

port = serial.Serial("/dev/ttyUSB0", baudrate=9600)

devices= map(InputDevice,('/dev/input/event0', '/dev/input/event1'))
devices = {dev.fd: dev for dev in devices}

numarag = ""

while True:
    r, w, x = select(devices,[],[])
    for fd in r:

        for event in devices[fd].read():
            if event.type == ecodes.EV_KEY:
                keybrd = categorize(event)
                if keybrd.keystate == keybrd.key_down:
                    g = keybrd.keycode
                    numg = g.split("_")
                    rakamg = numg[1]
                    if rakamg == "ENTER":
                        if str(r) == "[5]":
                            kartg = "G-"+numarag+"#"
                            print kartg
                            response = urllib2.urlopen('http://localhost/adminturnike/turnike.php?kart='+kartg+'')
                            html = response.read()
                            print html
             if html=='a' or html=='1':
                port.write(html)
                            kartg = ""
             numarag = ""
                        elif str(r) == "[4]":
                            kartc ="C-"+numarag+"#"
                            print kartc
                            response = urllib2.urlopen('http://localhost/adminturnike/turnike.php?kart='+kartc+'')
                            html = response.read()
                            print html
             if html=='a' or html=='1':
                port.write(html)
                            kartc = ""
             numarag = ""
                    else:
                        numarag = numarag + rakamg.strip()