monitor will print the received events for:
UDEV - the event which udev sends out after rule processing

UDEV  [1290663774.413985] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/001/012
DEVTYPE=usb_device
PRODUCT=230d/1/0
TYPE=2/0/0
BUSNUM=001
DEVNUM=012
SEQNUM=2322
ID_VENDOR=HSPADataCard
ID_VENDOR_ENC=HSPADataCard
ID_VENDOR_ID=230d
ID_MODEL=HSPADataCard
ID_MODEL_ENC=HSPADataCard
ID_MODEL_ID=0001
ID_REVISION=0000
ID_SERIAL=HSPADataCard_HSPADataCard_8444311594054030
ID_SERIAL_SHORT=8444311594054030
ID_BUS=usb
ID_USB_INTERFACES=:080650:020800:020201:0a0000:020901:010100:010200:
MAJOR=189
MINOR=11
DEVLINKS=/dev/char/189:11

UDEV  [1290663779.212674] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=8/6/80
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic08isc06ip50
SEQNUM=2323

UDEV  [1290663779.214214] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0/host22 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0/host22
SUBSYSTEM=scsi
DEVTYPE=scsi_host
SEQNUM=2324

UDEV  [1290663779.214987] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0/host22/scsi_host/host22 (scsi_host)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0/host22/scsi_host/host22
SUBSYSTEM=scsi_host
SEQNUM=2325

UDEV  [1290663779.839324] remove   /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0/host22/scsi_host/host22 (scsi_host)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0/host22/scsi_host/host22
SUBSYSTEM=scsi_host
SEQNUM=2326

UDEV  [1290663779.839602] remove   /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0/host22 (scsi)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0/host22
SUBSYSTEM=scsi
DEVTYPE=scsi_host
SEQNUM=2327

UDEV  [1290663779.840251] remove   /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0 (usb)
UDEV_LOG=3
ACTION=remove
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=8/6/80
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic08isc06ip50
SEQNUM=2328

UDEV  [1290663779.885068] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.1 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.1
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=2/2/1
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic02isc02ip01
SEQNUM=2330

UDEV  [1290663779.887511] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.3 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.3
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=2/2/1
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic02isc02ip01
SEQNUM=2333

UDEV  [1290663779.889287] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=2/8/0
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic02isc08ip00
SEQNUM=2329

UDEV  [1290663779.891102] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.2 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.2
SUBSYSTEM=usb
DEVTYPE=usb_interface
DRIVER=cdc_acm
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=10/0/0
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic0Aisc00ip00
SEQNUM=2332

UDEV  [1290663779.891348] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.5 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.5
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=2/9/1
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic02isc09ip01
SEQNUM=2336

UDEV  [1290663779.892873] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.4 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.4
SUBSYSTEM=usb
DEVTYPE=usb_interface
DRIVER=cdc_acm
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=10/0/0
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic0Aisc00ip00
SEQNUM=2335

UDEV  [1290663779.893981] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.5/usb/cdc-wdm0 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.5/usb/cdc-wdm0
SUBSYSTEM=usb
DEVNAME=/dev/cdc-wdm0
SEQNUM=2338
MAJOR=180
MINOR=176
DEVLINKS=/dev/char/180:176

UDEV  [1290663779.895155] add      /class/usb (class)
UDEV_LOG=3
ACTION=add
DEVPATH=/class/usb
SUBSYSTEM=class
SEQNUM=2337

UDEV  [1290663779.896570] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=1/1/0
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic01isc01ip00
SEQNUM=2339

UDEV  [1290663779.905225] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6/sound/card1 (sound)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6/sound/card1
SUBSYSTEM=sound
SEQNUM=2340

UDEV  [1290663779.907652] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.8 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.8
SUBSYSTEM=usb
DEVTYPE=usb_interface
DRIVER=snd-usb-audio
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=1/2/0
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic01isc02ip00
SEQNUM=2345

UDEV  [1290663779.910193] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.7 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.7
SUBSYSTEM=usb
DEVTYPE=usb_interface
DRIVER=snd-usb-audio
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=1/2/0
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic01isc02ip00
SEQNUM=2344

UDEV  [1290663779.917876] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9 (usb)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=230d/1/0
TYPE=2/0/0
INTERFACE=8/6/80
MODALIAS=usb:v230Dp0001d0000dc02dsc00dp00ic08isc06ip50
SEQNUM=2346

UDEV  [1290663779.922130] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6/sound/card1/pcmC1D0c (sound)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6/sound/card1/pcmC1D0c
SUBSYSTEM=sound
DEVNAME=/dev/snd/pcmC1D0c
SEQNUM=2342
MAJOR=116
MINOR=5
DEVLINKS=/dev/char/116:5
TAGS=:udev-acl:

UDEV  [1290663779.924452] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6/sound/card1/pcmC1D0p (sound)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6/sound/card1/pcmC1D0p
SUBSYSTEM=sound
DEVNAME=/dev/snd/pcmC1D0p
SEQNUM=2341
MAJOR=116
MINOR=4
DEVLINKS=/dev/char/116:4
TAGS=:udev-acl:

UDEV  [1290663779.933930] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.1/tty/ttyACM0 (tty)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.1/tty/ttyACM0
SUBSYSTEM=tty
DEVNAME=/dev/ttyACM0
SEQNUM=2331
ID_PATH=pci-0000:00:02.1-usb-0:4:3.1
ID_VENDOR=HSPADataCard
ID_VENDOR_ENC=HSPADataCard
ID_VENDOR_ID=230d
ID_MODEL=HSPADataCard
ID_MODEL_ENC=HSPADataCard
ID_MODEL_ID=0001
ID_REVISION=0000
ID_SERIAL=HSPADataCard_HSPADataCard_8444311594054030
ID_SERIAL_SHORT=8444311594054030
ID_TYPE=generic
ID_BUS=usb
ID_USB_INTERFACES=:080650:020800:020201:0a0000:020901:010100:010200:
ID_USB_INTERFACE_NUM=01
ID_USB_DRIVER=cdc_acm
ID_IFACE=01
MAJOR=166
MINOR=0
DEVLINKS=/dev/char/166:0 /dev/serial/by-path/pci-0000:00:02.1-usb-0:4:3.1 /dev/serial/by-id/usb-HSPADataCard_HSPADataCard_8444311594054030-if01

UDEV  [1290663779.935987] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.3/tty/ttyACM1 (tty)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.3/tty/ttyACM1
SUBSYSTEM=tty
DEVNAME=/dev/ttyACM1
SEQNUM=2334
ID_PATH=pci-0000:00:02.1-usb-0:4:3.3
ID_VENDOR=HSPADataCard
ID_VENDOR_ENC=HSPADataCard
ID_VENDOR_ID=230d
ID_MODEL=HSPADataCard
ID_MODEL_ENC=HSPADataCard
ID_MODEL_ID=0001
ID_REVISION=0000
ID_SERIAL=HSPADataCard_HSPADataCard_8444311594054030
ID_SERIAL_SHORT=8444311594054030
ID_TYPE=generic
ID_BUS=usb
ID_USB_INTERFACES=:080650:020800:020201:0a0000:020901:010100:010200:
ID_USB_INTERFACE_NUM=03
ID_USB_DRIVER=cdc_acm
ID_IFACE=03
MAJOR=166
MINOR=1
DEVLINKS=/dev/char/166:1 /dev/serial/by-path/pci-0000:00:02.1-usb-0:4:3.3 /dev/serial/by-id/usb-HSPADataCard_HSPADataCard_8444311594054030-if03

UDEV  [1290663779.936106] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23
SUBSYSTEM=scsi
DEVTYPE=scsi_host
SEQNUM=2347

UDEV  [1290663779.937987] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/scsi_host/host23 (scsi_host)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/scsi_host/host23
SUBSYSTEM=scsi_host
SEQNUM=2348

UDEV  [1290663779.946895] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6/sound/card1/controlC1 (sound)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6/sound/card1/controlC1
SUBSYSTEM=sound
DEVNAME=/dev/snd/controlC1
SEQNUM=2343
ID_VENDOR=HSPADataCard
ID_VENDOR_ENC=HSPADataCard
ID_VENDOR_ID=230d
ID_MODEL=HSPADataCard
ID_MODEL_ENC=HSPADataCard
ID_MODEL_ID=0001
ID_REVISION=0000
ID_SERIAL=HSPADataCard_HSPADataCard_8444311594054030
ID_SERIAL_SHORT=8444311594054030
ID_TYPE=audio
ID_BUS=usb
ID_USB_INTERFACES=:080650:020800:020201:0a0000:020901:010100:010200:
ID_USB_INTERFACE_NUM=06
ID_USB_DRIVER=snd-usb-audio
ID_IFACE=06
ID_PATH=pci-0000:00:02.1-usb-0:4:3.6
MAJOR=116
MINOR=6
DEVLINKS=/dev/char/116:6 /dev/snd/by-id/usb-HSPADataCard_HSPADataCard_8444311594054030-06 /dev/snd/by-path/pci-0000:00:02.1-usb-0:4:3.6
TAGS=:udev-acl:

UDEV  [1290663779.978687] change   /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6/sound/card1 (sound)
UDEV_LOG=3
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.6/sound/card1
SUBSYSTEM=sound
SEQNUM=2349
SOUND_INITIALIZED=1
ID_VENDOR=HSPADataCard
ID_VENDOR_ENC=HSPADataCard
ID_VENDOR_ID=230d
ID_MODEL=HSPADataCard
ID_MODEL_ENC=HSPADataCard
ID_MODEL_ID=0001
ID_REVISION=0000
ID_SERIAL=HSPADataCard_HSPADataCard_8444311594054030
ID_SERIAL_SHORT=8444311594054030
ID_TYPE=audio
ID_BUS=usb
ID_USB_INTERFACES=:080650:020800:020201:0a0000:020901:010100:010200:
ID_USB_INTERFACE_NUM=06
ID_USB_DRIVER=snd-usb-audio
ID_IFACE=06
ID_ID=usb-HSPADataCard_HSPADataCard_8444311594054030-06-HSPADataCard
ID_PATH=pci-0000:00:02.1-usb-0:4:3.6

UDEV  [1290663780.940217] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_target
SEQNUM=2350

UDEV  [1290663780.941688] add      /devices/virtual/bdi/8:0 (bdi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/virtual/bdi/8:0
SUBSYSTEM=bdi
SEQNUM=2357

UDEV  [1290663780.941715] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0 (scsi)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0
SUBSYSTEM=scsi
DEVTYPE=scsi_device
MODALIAS=scsi:t-0x00
SEQNUM=2351

UDEV  [1290663780.942718] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0/scsi_disk/23:0:0:0 (scsi_disk)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0/scsi_disk/23:0:0:0
SUBSYSTEM=scsi_disk
SEQNUM=2352

UDEV  [1290663780.943144] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0/scsi_generic/sg0 (scsi_generic)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0/scsi_generic/sg0
SUBSYSTEM=scsi_generic
DEVNAME=/dev/sg0
SEQNUM=2354
MAJOR=21
MINOR=0
DEVLINKS=/dev/char/21:0

UDEV  [1290663780.943796] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0/bsg/23:0:0:0 (bsg)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0/bsg/23:0:0:0
SUBSYSTEM=bsg
DEVNAME=/dev/bsg/23:0:0:0
SEQNUM=2355
MAJOR=253
MINOR=0
DEVLINKS=/dev/char/253:0

UDEV  [1290663780.945662] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0/scsi_device/23:0:0:0 (scsi_device)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0/scsi_device/23:0:0:0
SUBSYSTEM=scsi_device
SEQNUM=2353

UDEV  [1290663780.970638] add      /devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0/block/sda (block)
UDEV_LOG=3
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:02.1/usb1/1-4/1-4:3.9/host23/target23:0:0/23:0:0:0/block/sda
SUBSYSTEM=block
DEVNAME=/dev/sda
DEVTYPE=disk
SEQNUM=2356
ID_VENDOR=HSPAData
ID_VENDOR_ENC=HSPAData
ID_VENDOR_ID=230d
ID_MODEL=SD_Card
ID_MODEL_ENC=SD\x20Card\x20\x20\x20\x20\x20\x20\x20\x20\x20
ID_MODEL_ID=0001
ID_REVISION=0000
ID_SERIAL=HSPAData_SD_Card_8444311594054030-0:0
ID_SERIAL_SHORT=8444311594054030
ID_TYPE=disk
ID_INSTANCE=0:0
ID_BUS=usb
ID_USB_INTERFACES=:080650:020800:020201:0a0000:020901:010100:010200:
ID_USB_INTERFACE_NUM=09
ID_USB_DRIVER=usb-storage
ID_PATH=pci-0000:00:02.1-usb-0:4:3.9-scsi-0:0:0:0
UDISKS_PRESENTATION_NOPOLICY=0
MAJOR=8
MINOR=0
DEVLINKS=/dev/block/8:0 /dev/disk/by-id/usb-HSPAData_SD_Card_8444311594054030-0:0 /dev/disk/by-path/pci-0000:00:02.1-usb-0:4:3.9-scsi-0:0:0:0