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

KERNEL[807.281139] add      /devices/pci0000:00/0000:00:10.0/usb3/3-1 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb3/3-1
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/003/009
DEVTYPE=usb_device
PRODUCT=5ac/12a8/1108
TYPE=0/0/0
BUSNUM=003
DEVNUM=009
SEQNUM=3369
MAJOR=189
MINOR=264

KERNEL[807.290630] add      /devices/pci0000:00/0000:00:10.0/usb3/3-1/3-1:1.0 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb3/3-1/3-1:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=5ac/12a8/1108
TYPE=0/0/0
INTERFACE=6/1/1
MODALIAS=usb:v05ACp12A8d1108dc00dsc00dp00ic06isc01ip01in00
SEQNUM=3370

KERNEL[807.290761] add      /devices/pci0000:00/0000:00:10.0/usb3/3-1/power_supply/apple_mfi_fastcharge/wakeup35 (wakeup)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb3/3-1/power_supply/apple_mfi_fastcharge/wakeup35
SUBSYSTEM=wakeup
SEQNUM=3371

KERNEL[807.290870] bind     /devices/pci0000:00/0000:00:10.0/usb3/3-1 (usb)
ACTION=bind
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb3/3-1
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/003/009
DEVTYPE=usb_device
DRIVER=apple-mfi-fastcharge
PRODUCT=5ac/12a8/1108
TYPE=0/0/0
BUSNUM=003
DEVNUM=009
SEQNUM=3372
MAJOR=189
MINOR=264

KERNEL[807.300895] change   /devices/pci0000:00/0000:00:10.0/usb3/3-1/power_supply/apple_mfi_fastcharge (power_supply)
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb3/3-1/power_supply/apple_mfi_fastcharge
SUBSYSTEM=power_supply
POWER_SUPPLY_NAME=apple_mfi_fastcharge
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_CHARGE_TYPE=Trickle
POWER_SUPPLY_SCOPE=Device
SEQNUM=3373

UDEV  [807.333747] add      /devices/pci0000:00/0000:00:10.0/usb3/3-1 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb3/3-1
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/003/009
DEVTYPE=usb_device
PRODUCT=5ac/12a8/1108
TYPE=0/0/0
BUSNUM=003
DEVNUM=009
SEQNUM=3369
USEC_INITIALIZED=807314147
ID_VENDOR=Apple_Inc.
ID_VENDOR_ENC=Apple\x20Inc.
ID_VENDOR_ID=05ac
ID_MODEL=iPhone
ID_MODEL_ENC=iPhone
ID_MODEL_ID=12a8
ID_REVISION=1108
ID_SERIAL=Apple_Inc._iPhone_000080200004558E21D2002E
ID_SERIAL_SHORT=000080200004558E21D2002E
ID_BUS=usb
ID_USB_INTERFACES=:060101:010100:010200:030000:fffe02:fffd01:
ID_GPHOTO2=1
GPHOTO2_DRIVER=PTP
ID_VENDOR_FROM_DATABASE=Apple, Inc.
ID_MODEL_FROM_DATABASE=iPhone 5/5C/5S/6/SE
ID_PATH=pci-0000:00:10.0-usb-0:1
ID_PATH_TAG=pci-0000_00_10_0-usb-0_1
DRIVER=apple-mfi-fastcharge
ID_FOR_SEAT=usb-pci-0000_00_10_0-usb-0_1
COLORD_DEVICE=1
COLORD_KIND=camera
MAJOR=189
MINOR=264
TAGS=:seat:uaccess:
CURRENT_TAGS=:seat:uaccess:

UDEV  [807.339372] add      /devices/pci0000:00/0000:00:10.0/usb3/3-1/3-1:1.0 (usb)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb3/3-1/3-1:1.0
SUBSYSTEM=usb
DEVTYPE=usb_interface
PRODUCT=5ac/12a8/1108
TYPE=0/0/0
INTERFACE=6/1/1
MODALIAS=usb:v05ACp12A8d1108dc00dsc00dp00ic06isc01ip01in00
SEQNUM=3370
USEC_INITIALIZED=807338870
GPHOTO2_DRIVER=PTP
ID_GPHOTO2=1
ID_VENDOR_FROM_DATABASE=Apple, Inc.
ID_MODEL_FROM_DATABASE=iPhone 5/5C/5S/6/SE
adb_user=yes
ID_PATH=pci-0000:00:10.0-usb-0:1:1.0
ID_PATH_TAG=pci-0000_00_10_0-usb-0_1_1_0
ID_FOR_SEAT=usb-pci-0000_00_10_0-usb-0_1_1_0
COLORD_DEVICE=1
COLORD_KIND=camera
TAGS=:seat:uaccess:
CURRENT_TAGS=:seat:uaccess:

UDEV  [807.340091] add      /devices/pci0000:00/0000:00:10.0/usb3/3-1/power_supply/apple_mfi_fastcharge/wakeup35 (wakeup)
ACTION=add
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb3/3-1/power_supply/apple_mfi_fastcharge/wakeup35
SUBSYSTEM=wakeup
SEQNUM=3371
USEC_INITIALIZED=807339805

UDEV  [807.364355] bind     /devices/pci0000:00/0000:00:10.0/usb3/3-1 (usb)
ACTION=bind
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb3/3-1
SUBSYSTEM=usb
DEVNAME=/dev/bus/usb/003/009
DEVTYPE=usb_device
DRIVER=apple-mfi-fastcharge
PRODUCT=5ac/12a8/1108
TYPE=0/0/0
BUSNUM=003
DEVNUM=009
SEQNUM=3372
USEC_INITIALIZED=807314147
ID_VENDOR=Apple_Inc.
ID_VENDOR_ENC=Apple\x20Inc.
ID_VENDOR_ID=05ac
ID_MODEL=iPhone
ID_MODEL_ENC=iPhone
ID_MODEL_ID=12a8
ID_REVISION=1108
ID_SERIAL=Apple_Inc._iPhone_000080200004558E21D2002E
ID_SERIAL_SHORT=000080200004558E21D2002E
ID_BUS=usb
ID_USB_INTERFACES=:060101:010100:010200:030000:fffe02:fffd01:
ID_GPHOTO2=1
GPHOTO2_DRIVER=PTP
ID_VENDOR_FROM_DATABASE=Apple, Inc.
ID_MODEL_FROM_DATABASE=iPhone 5/5C/5S/6/SE
ID_PATH=pci-0000:00:10.0-usb-0:1
ID_PATH_TAG=pci-0000_00_10_0-usb-0_1
ID_FOR_SEAT=usb-pci-0000_00_10_0-usb-0_1
COLORD_DEVICE=1
COLORD_KIND=camera
MAJOR=189
MINOR=264
TAGS=:seat:uaccess:
CURRENT_TAGS=:seat:uaccess:

UDEV  [807.367095] change   /devices/pci0000:00/0000:00:10.0/usb3/3-1/power_supply/apple_mfi_fastcharge (power_supply)
ACTION=change
DEVPATH=/devices/pci0000:00/0000:00:10.0/usb3/3-1/power_supply/apple_mfi_fastcharge
SUBSYSTEM=power_supply
POWER_SUPPLY_NAME=apple_mfi_fastcharge
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_CHARGE_TYPE=Trickle
POWER_SUPPLY_SCOPE=Device
SEQNUM=3373
USEC_INITIALIZED=807366985