Human Interface Device Archieven - DomoticX Knowledge Center

Tag: Human Interface Device

USB – Device serial number

by SebastiaanPosted on 2020-06-10 Geplaatst in Randapparatuur op de Raspberry Pi (USB), USB Apparaten

With this python script you can retrieve serialnumber from USB devices (if present), you need to install pyusb first: sudo pip install pyusb Please note: You must run the python script with SUDO in front, otherwise you have no access to the devices …

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Getagd met HID, Human Interface Device, PyUSB, Serial number, USB

USB – HID human interface device

by SebastiaanPosted on 2020-06-10 Geplaatst in Randapparatuur op de Raspberry Pi (USB), USB Apparaten

With this python script you can capture keyboard (emulators) and barcode scanners trough evdev (event device), this way the part of code will only execute when the device is sending keys:

from evdev import *
dev = InputDevice('/dev/input/event1')

print(dev)

for event in dev.read_loop():
    if event.type == ecodes.EV_KEY:
        print(categorize(event))

from evdev import *

dev = InputDevice('/dev/input/event1')

print(dev)

for event in dev.read_loop():

if event.type == ecodes.EV_KEY:

print(categorize(event))

output:

key event at 1383327570.147000, 2 (KEY_1), down
key event at 1383327570.147990, 2 (KEY_1), up
key event at 1383327570.148997, 3 (KEY_2), down
key event at 1383327570.150010, 3 (KEY_2), up
key event at 1383327570.151009, 29 (KEY_LEFTCTRL), down
key event at 1383327570.151009, 42 (KEY_LEFTSHIFT), down
key event at 1383327570.152017, 36 (KEY_J), down
key event at 1383327570.153005, 36 (KEY_J), up
key event at 1383327570.154004, 29 (KEY_LEFTCTRL), up
key event at 1383327570.155005, 32 (KEY_D), down
key event at 1383327570.155993, 32 (KEY_D), up
key event at 1383327570.157002, 48 (KEY_B), down
key event at 1383327570.158015, 48 (KEY_B), up
key event at 1383327570.158997, 48 (KEY_B), down
key event at 1383327570.282002, 18 (KEY_E), up
key event at 1383327570.283004, 49 (KEY_N), down
key event at 1383327570.284005, 49 (KEY_N), up
key event at 1383327570.284968, 18 (KEY_E), down

key event at 1383327570.147000, 2 (KEY_1), down

key event at 1383327570.147990, 2 (KEY_1), up

key event at 1383327570.148997, 3 (KEY_2), down

key event at 1383327570.150010, 3 (KEY_2), up

key event at 1383327570.151009, 29 (KEY_LEFTCTRL), down

key event at 1383327570.151009, 42 (KEY_LEFTSHIFT), down

key event at 1383327570.152017, 36 (KEY_J), down

key event at 1383327570.153005, 36 (KEY_J), up

key event at 1383327570.154004, 29 (KEY_LEFTCTRL), up

key event at 1383327570.155005, 32 (KEY_D), down

key event at 1383327570.155993, 32 (KEY_D), up

key event at 1383327570.157002, 48 (KEY_B), down

key event at 1383327570.158015, 48 (KEY_B), up

key event at 1383327570.158997, 48 (KEY_B), down

key event at 1383327570.282002, 18 (KEY_E), up

key event at 1383327570.283004, 49 (KEY_N), down

key event at 1383327570.284005, 49 (KEY_N), up

key event at 1383327570.284968, 18 (KEY_E), down

Another python script example:

import evdev
from evdev import InputDevice, categorize  # import * is evil :)
dev = InputDevice('/dev/input/event1')

# Provided as an example taken from my own keyboard attached to a Centos 6 box:
scancodes = {
    # Scancode: ASCIICode
    0: None, 1: u'ESC', 2: u'1', 3: u'2', 4: u'3', 5: u'4', 6: u'5', 7: u'6', 8: u'7', 9: u'8',
    10: u'9', 11: u'0', 12: u'-', 13: u'=', 14: u'BKSP', 15: u'TAB', 16: u'Q', 17: u'W', 18: u'E', 19: u'R',
    20: u'T', 21: u'Y', 22: u'U', 23: u'I', 24: u'O', 25: u'P', 26: u'[', 27: u']', 28: u'CRLF', 29: u'LCTRL',
    30: u'A', 31: u'S', 32: u'D', 33: u'F', 34: u'G', 35: u'H', 36: u'J', 37: u'K', 38: u'L', 39: u';',
    40: u'"', 41: u'`', 42: u'LSHFT', 43: u'\\', 44: u'Z', 45: u'X', 46: u'C', 47: u'V', 48: u'B', 49: u'N',
    50: u'M', 51: u',', 52: u'.', 53: u'/', 54: u'RSHFT', 56: u'LALT', 100: u'RALT'
}
for event in dev.read_loop():
    if event.type == evdev.ecodes.EV_KEY:
        data = evdev.categorize(event)  # Save the event temporarily to introspect it
        if data.keystate == 1:  # Down events only
            key_lookup = scancodes.get(data.scancode) or u'UNKNOWN:{}'.format(data.scancode)  # Lookup or return UNKNOWN:XX
            print u'You Pressed the {} key!'.format(key_lookup)  # Print it all out!

import evdev

from evdev import InputDevice, categorize # import * is evil :)

dev = InputDevice('/dev/input/event1')

# Provided as an example taken from my own keyboard attached to a Centos 6 box:

scancodes = {

# Scancode: ASCIICode

0: None, 1: u'ESC', 2: u'1', 3: u'2', 4: u'3', 5: u'4', 6: u'5', 7: u'6', 8: u'7', 9: u'8',

10: u'9', 11: u'0', 12: u'-', 13: u'=', 14: u'BKSP', 15: u'TAB', 16: u'Q', 17: u'W', 18: u'E', 19: u'R',

20: u'T', 21: u'Y', 22: u'U', 23: u'I', 24: u'O', 25: u'P', 26: u'[', 27: u']', 28: u'CRLF', 29: u'LCTRL',

30: u'A', 31: u'S', 32: u'D', 33: u'F', 34: u'G', 35: u'H', 36: u'J', 37: u'K', 38: u'L', 39: u';',

40: u'"', 41: u'`', 42: u'LSHFT', 43: u'\\', 44: u'Z', 45: u'X', 46: u'C', 47: u'V', 48: u'B', 49: u'N',

50: u'M', 51: u',', 52: u'.', 53: u'/', 54: u'RSHFT', 56: u'LALT', 100: u'RALT'

}

for event in dev.read_loop():

if event.type == evdev.ecodes.EV_KEY:

data = evdev.categorize(event) # Save the event temporarily to introspect it

if data.keystate == 1: # Down events only

key_lookup = scancodes.get(data.scancode) or u'UNKNOWN:{}'.format(data.scancode) # Lookup or return UNKNOWN:XX

print u'You Pressed the {} key!'.format(key_lookup) # Print it all out!

Output: …

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Getagd met Barcode, EVDEV, HID, Human Interface Device, Keyboard, Python