How to use Libudev to find out which ports are connected to my Usb

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I made a kind of module. Different sensors are placed in the module. I connected the module to Raspberry Pi through RS232 converter. I am using Libudev to automatically find out which Pi port has RS232 converter using Vendor Id and Product Id and reading data from it successfully and displaying it on front-end. Now my problem is that I have two modules now and both are connected with same Pi and both RS232 Vendor id and Product id are same . In front end I have made an option to select module 1 or 2. How do I differentiate between both converters aside from Vendor id and Product id. It would be best if the solution can be provided through Libudev.
P.S : Currently Libudev detects the most recent port I plugged the RS232 converter in.






linux raspberry-pi udev serial-port






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    I made a kind of module. Different sensors are placed in the module. I connected the module to Raspberry Pi through RS232 converter. I am using Libudev to automatically find out which Pi port has RS232 converter using Vendor Id and Product Id and reading data from it successfully and displaying it on front-end. Now my problem is that I have two modules now and both are connected with same Pi and both RS232 Vendor id and Product id are same . In front end I have made an option to select module 1 or 2. How do I differentiate between both converters aside from Vendor id and Product id. It would be best if the solution can be provided through Libudev.
    P.S : Currently Libudev detects the most recent port I plugged the RS232 converter in.






    linux raspberry-pi udev serial-port






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      down vote

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      I made a kind of module. Different sensors are placed in the module. I connected the module to Raspberry Pi through RS232 converter. I am using Libudev to automatically find out which Pi port has RS232 converter using Vendor Id and Product Id and reading data from it successfully and displaying it on front-end. Now my problem is that I have two modules now and both are connected with same Pi and both RS232 Vendor id and Product id are same . In front end I have made an option to select module 1 or 2. How do I differentiate between both converters aside from Vendor id and Product id. It would be best if the solution can be provided through Libudev.
      P.S : Currently Libudev detects the most recent port I plugged the RS232 converter in.






      linux raspberry-pi udev serial-port






      share













      I made a kind of module. Different sensors are placed in the module. I connected the module to Raspberry Pi through RS232 converter. I am using Libudev to automatically find out which Pi port has RS232 converter using Vendor Id and Product Id and reading data from it successfully and displaying it on front-end. Now my problem is that I have two modules now and both are connected with same Pi and both RS232 Vendor id and Product id are same . In front end I have made an option to select module 1 or 2. How do I differentiate between both converters aside from Vendor id and Product id. It would be best if the solution can be provided through Libudev.
      P.S : Currently Libudev detects the most recent port I plugged the RS232 converter in.






      linux raspberry-pi udev serial-port




      linux raspberry-pi udev serial-port





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      Usman Khan

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