Identifying Bootloader ttyACM# device

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hi, i'm using modified version of arduino 0 bootloader. trying write software automatically detect usb device bootloader running on in order execute bossac. have noticed few unique characteristics when using "lsusb -v". things "bdeviceclass" 2. , "bdevicesubclass" 0; however, not feel confident in using these traits identify bootloader. there clear indication of bootloader can find correct ttyacm#?



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