Simple way to query connected USB devices info in Python

Question

How can we query connected USB devices info in Python  I want to get UID Device Name  ex  SonyEricsson W660   path to device  ex   dev ttyACM0   And also what would be the best Parameter out of above info to be used as identifying the device whenever it s connected again   UID    I am working on Ubuntu 11 04   ATM I have this code  using pyUSB   busses   usb busses   for bus in busses    devices   bus devices   for dev in devices      print repr dev      print  Device    dev filename     print    idVendor   d  0x 04x      dev idVendor  dev idVendor      print    idProduct   d  0x 04x      dev idProduct  dev idProduct      print  Manufacturer    dev iManufacturer     print  Serial    dev iSerialNumber     print  Product    dev iProduct   The problem is I don t get desired output  will paste one example    lt usb legacy Device object at 0x1653990 gt  Device     idVendor  4046  0x0fce    idProduct  53411  0xd0a3  Manufacturer  1 Serial  3 Product  2   First I don t get filename  it s most important to me  I am assuming it is the  dev ttyACM0 etc part  Second  I guess there was some UID of every USB device  or I should use both Vendor or Product id   EDIT  Apparently I have some setup issues  I think I am using wrong USB Library   using libusb0 1  ATM  That s why I get Device  dev filename  string empty  If someone can please just tell that on what operating system he is using what USB Library and what version of PyUSB I think it will solve my problems

User · Answer

If you are working on windows  you can use pywin32  old link  see update below   I found an example here  import win32com client  wmi   win32com client GetObject   quot winmgmts  quot   for usb in wmi InstancesOf   quot Win32 USBHub quot        print usb DeviceID   Update Apr 2020   pywin32  release versions from 218 and up can be found here at github  Current version 227

User · Answer

When I run your code  I get the following output for example    lt usb Device object at 0xef38c0 gt  Device  001   idVendor  7531  0x1d6b    idProduct  1  0x0001  Manufacturer  3 Serial  1 Product  2   Noteworthy are that a  I have usb Device objects whereas you have usb legacy Device objects  and b  I have device filenames    Each usb Bus has a dirname field and each usb Device has the filename  As you can see  the filename is something like 001  and so is the dirname  You can combine these to get the bus file  For dirname 001 and filname 001  it should be something like  dev bus usb 001 001   You should first  though figure out what this  usb legacy  situation is  I m running the latest version and I don t even have a legacy sub-module    Finally  you should use the idVendor and idProduct fields to uniquely identify the device when it s plugged in

User · Answer

For linux  I wrote a script called find port py which you can find here  https   github com dhylands usb-ser-mon blob master usb ser mon find port py  It uses pyudev to enumerate all tty devices  and can match on various attributes   Use the --list option to show all of the know USB serial ports and their attributes  You can filter by VID  PID  serial number  or vendor name  Use --help to see the filtering options   find port py prints the  dev ttyXXX name rather than the  dev usb     name

User · Answer

I can think of a quick code like this  Since all USB ports can be accessed via  dev bus usb  lt  bus  gt   lt  device  gt  For the ID generated  even if you unplug the device and reattach it   could be some other port    It will be the same  import re import subprocess device re   re compile  quot Bus s   P lt bus gt  d   s Device s   P lt device gt  d    ID s  P lt id gt  w   w   s  P lt tag gt      quot   re I  df   subprocess check output  quot lsusb quot   devices      for i in df split   n        if i          info   device re match i          if info              dinfo   info groupdict               dinfo  device       dev bus usb  s  s     dinfo pop  bus    dinfo pop  device                devices append dinfo  print devices  Sample output here will be      device     dev bus usb 001 009    tag    Apple  Inc  Optical USB Mouse  Mitsumi     id    05ac 0304      device     dev bus usb 001 001    tag    Linux Foundation 2 0 root hub    id    1d6b 0002      device     dev bus usb 001 002    tag    Intel Corp  Integrated Rate Matching Hub    id    8087 0020      device     dev bus usb 001 004    tag    Microdia     id    0c45 641d      Code Updated for Python 3 import re import subprocess device re   re compile b quot Bus s   P lt bus gt  d   s Device s   P lt device gt  d    ID s  P lt id gt  w   w   s  P lt tag gt      quot   re I  df   subprocess check output  quot lsusb quot   devices      for i in df split b  n        if i          info   device re match i          if info              dinfo   info groupdict               dinfo  device       dev bus usb  s  s     dinfo pop  bus    dinfo pop  device                devices append dinfo               print devices

User · Answer

For a system with legacy usb coming back and libusb-1 0  this approach will work to retrieve the various actual strings  I show the vendor and product as examples  It can cause some I O  because it actually reads the info from the device  at least the first time  anyway   Some devices don t provide this information  so the presumption that they do will throw an exception in that case  that s ok  so we pass   import usb core import usb backend libusb1  busses   usb busses   for bus in busses      devices   bus devices     for dev in devices          if dev    None              try                  xdev   usb core find idVendor dev idVendor  idProduct dev idProduct                  if xdev  manufacturer is None                      xdev  manufacturer   usb util get string xdev  xdev iManufacturer                  if xdev  product is None                      xdev  product   usb util get string xdev  xdev iProduct                  stx     6d  6d    str xdev  manufacturer  strip         str xdev  product  strip                   print stx    dev idVendor dev idProduct              except                  pass

User · Answer

If you just need the  name of the device here is a little hack which i wrote in bash  To run it in python you need the following snippet  Just replace  1 and  2 with Bus number and Device number eg 001 or 002   import os os system  lsusb   grep   Bus  1 Device  2     sed  s          awk   for i 7 i lt  NF   i print  i       Alternately you can save it as a bash script and run it from there too  Just save it as a bash script like foo sh make it executable       bin bash myvar   lsusb   grep  Bus  1 Device  2    sed  s          awk   for i 7 i lt  NF   i print  i    echo  myvar   Then call it in python script as   import os os system  foo sh

[python] Simple way to query connected USB devices info in Python?

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