gistfile1.txt

$ udevadm monitor
monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[7429.428712] remove   /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0 (usb)
KERNEL[7429.430890] remove   /devices/pci0000:00/0000:00:14.0/usb3/3-2 (usb)
UDEV  [7429.430949] remove   /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0 (usb)
UDEV  [7429.440597] remove   /devices/pci0000:00/0000:00:14.0/usb3/3-2 (usb)
KERNEL[7432.639003] add      /devices/pci0000:00/0000:00:14.0/usb3/3-2 (usb)
KERNEL[7432.639558] add      /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0 (usb)
UDEV  [7432.655997] add      /devices/pci0000:00/0000:00:14.0/usb3/3-2 (usb)
UDEV  [7432.656725] add      /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0 (usb)

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$ dmesg | tail
[ 7137.991935] usb 3-2: USB disconnect, device number 9
[ 7139.339655] usb 3-2: new full-speed USB device number 10 using xhci_hcd
[ 7139.358112] usb 3-2: New USB device found, idVendor=0451, idProduct=16ae
[ 7139.358120] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 7139.358125] usb 3-2: Product: CC2531 USB Dongle
[ 7139.358129] usb 3-2: Manufacturer: Texas Instruments

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$ cat /lib/udev/rules.d/69-cc2531.rules 
KERNEL=="ttyUSB?", SUBSYSTEMS=="usb", GROUP=="a", ATTRS{idVendor}=="0451", ATTRS{idProduct}=="16ae", SYMLINK+="cc2531"

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$ tail /var/log/syslog

Jan 27 16:29:15 workstation kernel: [ 5696.840158] usb 3-2: new full-speed USB device number 7 using xhci_hcd
Jan 27 16:29:15 workstation kernel: [ 5696.858408] usb 3-2: New USB device found, idVendor=0451, idProduct=16ae
Jan 27 16:29:15 workstation kernel: [ 5696.858417] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 27 16:29:15 workstation kernel: [ 5696.858422] usb 3-2: Product: CC2531 USB Dongle
Jan 27 16:29:15 workstation kernel: [ 5696.858426] usb 3-2: Manufacturer: Texas Instruments
Jan 27 16:29:15 workstation mtp-probe: checking bus 3, device 7: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2"
Jan 27 16:29:15 workstation mtp-probe: bus: 3, device: 7 was not an MTP device