Logicool K400r + Raspberry Pi Zero W + Raspberry Pi OS buster
=============================================================

* event0 : keyboard
* event0 : mouse (touchpad)

- - -

```
$ ls -alF /dev/input/

合計 0
drwxr-xr-x  4 root root     140  2月 26 09:29 ./
drwxr-xr-x 17 root root    3660  2月 26 09:29 ../
drwxr-xr-x  2 root root     100  2月 26 09:29 by-id/
drwxr-xr-x  2 root root      80  2月 26 09:29 by-path/
crw-rw----  1 root input 13, 64  2月 26 09:29 event0
crw-rw----  1 root input 13, 63  2月 26 09:28 mice
crw-rw----  1 root input 13, 32  2月 26 09:29 mouse0

$ ls -alF /dev/input/by-id/

合計 0
drwxr-xr-x 2 root root 100  2月 26 09:29 ./
drwxr-xr-x 4 root root 140  2月 26 09:29 ../
lrwxrwxrwx 1 root root   9  2月 26 09:29 usb-Logitech_USB_Receiver-event-if01 -> ../event2
lrwxrwxrwx 1 root root   9  2月 26 09:29 usb-Logitech_USB_Receiver-if02-event-mouse -> ../event0
lrwxrwxrwx 1 root root   9  2月 26 09:29 usb-Logitech_USB_Receiver-if02-mouse -> ../mouse0

$ ls -alF /dev/input/by-path/

合計 0
drwxr-xr-x 2 root root  80  2月 26 09:29 ./
drwxr-xr-x 4 root root 140  2月 26 09:29 ../
lrwxrwxrwx 1 root root   9  2月 26 09:29 platform-20980000.usb-usb-0:1.1:1.2-event-mouse -> ../event0
lrwxrwxrwx 1 root root   9  2月 26 09:29 platform-20980000.usb-usb-0:1.1:1.2-mouse -> ../mouse0

$ cat /proc/bus/input/devices

I: Bus=0003 Vendor=046d Product=4024 Version=0111
N: Name="Logitech K400"
P: Phys=usb-20980000.usb-1.1/input2:1
S: Sysfs=/devices/platform/soc/20980000.usb/usb1/1-1/1-1.1/1-1.1:1.2/0003:046D:C52B.0003/0003:046D:4024.0004/input/input12
U: Uniq=4024-73-8d-f5-e4
H: Handlers=sysrq kbd leds mouse0 event0
B: PROP=0
B: EV=12001f
B: KEY=3f 301ff 0 0 0 0 483ffff 17aff32d bfd44446 0 0 ffff0001 130ff3 8b17c007 ffff7bfa d941dfff ffbeffdf ffefffff ffffffff fffffffe
B: REL=1943
B: ABS=1 0
B: MSC=10
B: LED=1f

```

```
> python evdump.py
Please input, hexadecimal or 'exit'
EV=12001f
 -> EV_SYN EV_KEY EV_REL EV_ABS EV_MSC EV_LED EV_REP

```

```
$ lsinput
/dev/input/event0
   bustype : BUS_USB
   vendor  : 0x46d
   product : 0x4024
   version : 273
   name    : "Logitech K400"
   phys    : "usb-20980000.usb-1.1/input2:1"
   uniq    : "4024-73-8d-f5-e4"
   bits ev : EV_SYN EV_KEY EV_REL EV_ABS EV_MSC EV_LED EV_REP

```