How do I press Keypad using keyboard.press function

Here's the list of keyboard modifier : Keyboard Modifiers - 아두이노 참조

but in the URL I don't see any modifiers in tenkey pad. Does anyone know a solution for this?

See keys 83 through 103. Note that you have to use the numbers 219 through 239 to get the keycodes through Keyboard.

Modifier codes:
#define KEY_LEFT_CTRL     0x80
#define KEY_LEFT_SHIFT    0x81
#define KEY_LEFT_ALT      0x82
#define KEY_LEFT_GUI      0x83
#define KEY_RIGHT_CTRL    0x84
#define KEY_RIGHT_SHIFT   0x85
#define KEY_RIGHT_ALT     0x86
#define KEY_RIGHT_GUI     0x87

USB CODE	Keyboard()	Key Location on US-en Keyboard
========	==========	==============================
0	0x00				Reserved (no event indicated) *9
1	0x01				Keyboard ErrorRollOver *9 
2	0x02				Keyboard POSTFail *9 
3	0x03				Keyboard ErrorUndefined *9 
4	0x04	140	0x8C	Keyboard a and A *4 
5	0x05	141	0x8D	Keyboard b and B 
6	0x06	142	0x8E	Keyboard c and C *4 
7	0x07	143	0x8F	Keyboard d and D 
8	0x08	144	0x90	Keyboard e and E 
9	0x09	145	0x91	Keyboard f and F 
10	0x0A	146	0x92	Keyboard g and G 
11	0x0B	147	0x93	Keyboard h and H 
12	0x0C	148	0x94	Keyboard i and I 
13	0x0D	149	0x95	Keyboard j and J 
14	0x0E	150	0x96	Keyboard k and K 
15	0x0F	151	0x97	Keyboard l and L 
16	0x10	152	0x98	Keyboard m and M *4 
17	0x11	153	0x99	Keyboard n and N 
18	0x12	154	0x9A	Keyboard o and O *4 
19	0x13	155	0x9B	Keyboard p and P *4 
20	0x14	156	0x9C	Keyboard q and Q *4
21	0x15	157	0x9D	Keyboard r and R
22	0x16	158	0x9E	Keyboard s and S *4
23	0x17	159	0x9F	Keyboard t and T
24	0x18	160	0xA0	Keyboard u and U
25	0x19	161	0xA1	Keyboard v and V
26	0x1A	162	0xA2	Keyboard w and W *4
27	0x1B	163	0xA3	Keyboard x and X *4
28	0x1C	164	0xA4	Keyboard y and Y *4
29	0x1D	165	0xA5	Keyboard z and Z *4
30	0x1E	166	0xA6	Keyboard 1 and ! *4
31	0x1F	167	0xA7	Keyboard 2 and @ *4
32	0x20	168	0xA8	Keyboard 3 and # *4
33	0x21	169	0xA9	Keyboard 4 and $ *4
34	0x22	170	0xAA	Keyboard 5 and % *4
35	0x23	171	0xAB	Keyboard 6 and ^ *4
36	0x24	172	0xAC	Keyboard 7 and & *4
37	0x25	173	0xAD	Keyboard 8 and * *4
38	0x26	174	0xAE	Keyboard 9 and ( *4
39	0x27	175	0xAF	Keyboard 0 and ) *4
40	0x28	176	0xB0	Keyboard Return (ENTER) *5 
41	0x29	177	0xB1	Keyboard ESCAPE
42	0x2A	178	0xB2	Keyboard DELETE (Backspace) *13 
43	0x2B	179	0xB3	Keyboard Tab
44	0x2C	180	0xB4	Keyboard Spacebar
45	0x2D	181	0xB5	Keyboard - and (underscore) *4 
46	0x2E	182	0xB6	Keyboard = and + *4
47	0x2F	183	0xB7	Keyboard [ and { *4
48	0x30	184	0xB8	Keyboard ] and } *4
49	0x31	185	0xB9	Keyboard \ and |
50	0x32	186	0xBA	Keyboard Non-US # and ~ *2 
51	0x33	187	0xBB	Keyboard ; and : *4
52	0x34	188	0xBC	Keyboard ‘ and “ *4
53	0x35	189	0xBD	Keyboard Grave Accent and Tilde *4 
54	0x36	190	0xBE	Keyboard , and < *4
55	0x37	191	0xBF	Keyboard . and > *4
56	0x38	192	0xC0	Keyboard / and ? *4
57	0x39	193	0xC1	Keyboard Caps Lock *11
58	0x3A	194	0xC2	Keyboard F1
59	0x3B	195	0xC3	Keyboard F2
60	0x3C	196	0xC4	Keyboard F3
61	0x3D	197	0xC5	Keyboard F4
62	0x3E	198	0xC6	Keyboard F5
63	0x3F	199	0xC7	Keyboard F6
64	0x40	200	0xC8	Keyboard F7
65	0x41	201	0xC9	Keyboard F8
66	0x42	202	0xCA	Keyboard F9
67	0x43	203	0xCB	Keyboard F10
68	0x44	204	0xCC	Keyboard F11
69	0x45	205	0xCD	Keyboard F12
70	0x46	206	0xCE	Keyboard PrintScreen *1 
71	0x47	207	0xCF	Keyboard Scroll Lock *11 
72	0x48	208	0xD0	Keyboard Pause *1
73	0x49	209	0xD1	Keyboard Insert *1
74	0x4A	210	0xD2	Keyboard Home *1
75	0x4B	211	0xD3	Keyboard PageUp *1 
76	0x4C	212	0xD4	Keyboard Delete Forward *1;*14 
77	0x4D	213	0xD5	Keyboard End *1
78	0x4E	214	0xD6	Keyboard PageDown *1 
79	0x4F	215	0xD7	Keyboard RightArrow *1 
80	0x50	216	0xD8	Keyboard LeftArrow *1 
81	0x51	217	0xD9	Keyboard DownArrow *1 
82	0x52	218	0xDA	Keyboard UpArrow *1
83	0x53	219	0xDB	Keypad Num Lock and Clear *11 
84	0x54	220	0xDC	Keypad / *1
85	0x55	221	0xDD	Keypad * 
86	0x56	222	0xDE	Keypad - 
87	0x57	223	0xDF	Keypad + 
88	0x58	224	0xE0	Keypad ENTER *5
89	0x59	225	0xE1	Keypad 1 and End
90	0x5A	226	0xE2	Keypad 2 and Down Arrow
91	0x5B	227	0xE3	Keypad 3 and PageDn
92	0x5C	228	0xE4	Keypad 4 and Left Arrow
93	0x5D	229	0xE5	Keypad 5 
94	0x5E	230	0xE6	Keypad 6 and Right Arrow
95	0x5F	231	0xE7	Keypad 7 and Home
96	0x60	232	0xE8	Keypad 8 and Up Arrow
97	0x61	233	0xE9	Keypad 9 and PageUp
98	0x62	234	0xEA	Keypad 0 and Insert 
99	0x63	235	0xEB	Keypad . and Delete
100	0x64	236	0xEC	Keyboard Non-US \ and | *3;*6
101	0x65	237	0xED	Application *10
102	0x66	238	0xEE	Keyboard Power *9
103	0x67	239	0xEF	Keypad =
104	0x68	240	0xF0	Keyboard F13
105	0x69	241	0xF1	Keyboard F14
106	0x6A	242	0xF2	Keyboard F15
107	0x6B	243	0xF3	Keyboard F16
108	0x6C	244	0xF4	Keyboard F17
109	0x6D	245	0xF5	Keyboard F18
110	0x6E	246	0xF6	Keyboard F19
111	0x6F	247	0xF7	Keyboard F20
112	0x70	248	0xF8	Keyboard F21
113	0x71	249	0xF9	Keyboard F22
114	0x72	250	0xFA	Keyboard F23
115	0x73	251	0xFB	Keyboard F24
116	0x74	252	0xFC	Keyboard Execute
117	0x75	253	0xFD	Keyboard Help
118	0x76	254	0xFE	Keyboard Menu
119	0x77	255	0xFF	Keyboard Select  

(END OF CODES REACHABLE FROM Keyboard.write)

To use keycodes beyond this point you have to add some functions to the Keyboard library to allow you to send raw keycodes:

// pressRaw() adds the specified USB raw keycode to the persistent key 
// report and sends the report.
size_t Keyboard_::pressRaw(uint8_t k) 
{
	uint8_t i;
	
	// Add k to the key report only if it's not already present
	// and if there is an empty slot.
	if (_keyReport.keys[0] != k && _keyReport.keys[1] != k && 
		_keyReport.keys[2] != k && _keyReport.keys[3] != k &&
		_keyReport.keys[4] != k && _keyReport.keys[5] != k) {
		
		for (i=0; i<6; i++) {
			if (_keyReport.keys[i] == 0x00) {
				_keyReport.keys[i] = k;
				break;
			}
		}
		if (i == 6) {
			setWriteError();
			return 0;
		}	
	}
	sendReport(&_keyReport);
	return 1;
}


// releaseRaw() takes the specified key out of the persistent key report and
// sends the report.  This tells the OS the key is no longer pressed and that
// it shouldn't be repeated any more.
size_t Keyboard_::releaseRaw(uint8_t k) 
{
	uint8_t i;
	
	// Test the key report to see if k is present.  Clear it if it exists.
	// Check all positions in case the key is present more than once (which it shouldn't be)
	for (i=0; i<6; i++) {
		if (0 != k && _keyReport.keys[i] == k) {
			_keyReport.keys[i] = 0x00;
		}
	}


	sendReport(&_keyReport);
	return 1;
}


size_t Keyboard_::writeRaw(uint8_t c)
{
	uint8_t p = pressRaw(c);  // Keydown
	releaseRaw(c);            // Keyup
	return p;              // just return the result of press() since releaseRaw() almost always returns 1
}

You would add these functions to Keyboard.cpp and modify the Keyboard class in Keyboard.h to add:

  size_t writeRaw(uint8_t k);
  size_t pressRaw(uint8_t k);
  size_t releaseRaw(uint8_t k);
120	0x78			Keyboard Stop
121	0x79			Keyboard Again
122	0x7A			Keyboard Undo
123	0x7B			Keyboard Cut
124	0x7C			Keyboard Copy
125	0x7D			Keyboard Paste
126	0x7E			Keyboard Find
127	0x7F			Keyboard Mute
128	0x80			Keyboard Volume Up
129	0x81			Keyboard Volume Down 
130	0x82			Keyboard Locking Caps Lock *12 
131	0x83			Keyboard Locking Num Lock *12 
132	0x84			Keyboard Locking Scroll Lock *12
133	0x85			Keypad Comma  *27 
134	0x86			Keypad Equal Sign *29
135	0x87			Keyboard International1 *15,*28
136	0x88			Keyboard International2 *16
137	0x89			Keyboard International3 *17
138	0x8A			Keyboard International4 *18
139	0x8B			Keyboard International5 *19 
140	0x8C			Keyboard International6 *20 
141	0x8D			Keyboard International7 *21 
142	0x8E			Keyboard International8 *22 
143	0x8F			Keyboard International9 *22 
144	0x90			Keyboard LANG1 *25 
145	0x91			Keyboard LANG2 *26 
146	0x92			Keyboard LANG3 *30 
147	0x93			Keyboard LANG4 *31 
148	0x94			Keyboard LANG5 *32 
149	0x95			Keyboard LANG6 *8
150	0x96			Keyboard LANG7 *8
151	0x97			Keyboard LANG8 *8
152	0x98			Keyboard LANG9 *8
153	0x99			Keyboard Alternate Erase *7 
154	0x9A			Keyboard SysReq/Attention *1 
155	0x9B			Keyboard Cancel
156	0x9C			Keyboard Clear 
157	0x9D			Keyboard Prior 
158	0x9E			Keyboard Return 
159	0x9F			Keyboard Separator 
160	0xA0			Keyboard Out
161	0xA1			Keyboard Oper 
162	0xA2			Keyboard Clear/Again 
163	0xA3			Keyboard CrSel/Props 
164	0xA4			Keyboard ExSel
165	0xA5			Reserved
166	0xA6			Reserved
167	0xA7			Reserved
168	0xA8			Reserved
169	0xA9			Reserved
170	0xAA			Reserved
171	0xAB			Reserved
172	0xAC			Reserved
173	0xAD			Reserved
174	0xAE			Reserved
175	0xAF			Reserved
176	0xB0			Keypad 00
177	0xB1			Keypad 000
178	0xB2			Thousands Separator *33 
179	0xB3			Decimal Separator *33 
180	0xB4			Currency Unit *34 
181	0xB5			Currency Sub-unit *34 
182	0xB6			Keypad (
183	0xB7			Keypad )
184	0xB8			Keypad {
185	0xB9			Keypad }
186	0xBA			Keypad Tab 
187	0xBB			Keypad Backspace 
188	0xBC			Keypad A
189	0xBD			Keypad B
190	0xBE			Keypad C
191	0xBF			Keypad D
192	0xC0			Keypad E
193	0xC1			Keypad F
194	0xC2			Keypad XOR
195	0xC3			Keypad ^
196	0xC4			Keypad %
197	0xC5			Keypad <
198	0xC6			Keypad >
199	0xC7			Keypad &
200	0xC8			Keypad &&
201	0xC9			Keypad |
202	0xCA			Keypad ||
203	0xCB			Keypad :
204	0xCC			Keypad #
205	0xCD			Keypad Space
206	0xCE			Keypad @
207	0xCF			Keypad !
208	0xD0			Keypad Memory Store 
209	0xD1			Keypad Memory Recall 
210	0xD2			Keypad Memory Clear 
211	0xD3			Keypad Memory Add 
212	0xD4			Keypad Memory Subtract 
213	0xD5			Keypad Memory Multiply 
214	0xD6			Keypad Memory Divide 
215	0xD7			Keypad +/-
216	0xD8			Keypad Clear 
217	0xD9			Keypad Clear Entry 
218	0xDA			Keypad Binary 
219	0xDB			Keypad Octal 
220	0xDC			Keypad Decimal
221	0xDD			Keypad Hexadecimal 
222	0xDE			Reserved
223	0xDF			Reserved
224	0xE0			Keyboard LeftControl
225	0xE1			Keyboard LeftShift 44
226	0xE2			Keyboard LeftAlt 60
227	0xE3			Keyboard Left GUI *10;*23 127
228	0xE4			Keyboard RightControl 64
229	0xE5			Keyboard RightShift 57
230	0xE6			Keyboard RightAlt 62
231	0xE7			Keyboard Right GUI *10;*24
				
				Footnotes:
				1 Usage of keys is not modified by the state of the Control, Alt, Shift or Num Lock keys. That is, a key does not send extra codes to compensate for the state of any Control, Alt, Shift or Num Lock keys.
				2 Typical language mappings: US: \| Belg: μ`£ FrCa: <}> Dan:’* Dutch: <> Fren:*μ Ger: #’ Ital: ù§ LatAm: }`] Nor:,* Span: }Ç Swed: ,* Swiss: $£ UK: #~.
				3 Typical language mappings: Belg:<\> FrCa:«°» Dan:<\> Dutch:]|[ Fren:<> Ger:<|> Ital:<> LatAm:<> Nor:<> Span:<> Swed:<|> Swiss:<\> UK:\| Brazil: \|.
				4 Typically remapped for other languages in the host system.
				5 Keyboard Enter and Keypad Enter generate different Usage codes.
				6 Typically near the Left-Shift key in AT-102 implementations.
				7 Example, Erase-EazeTM key.
				8 Reserved for language-specific functions, such as Front End Processors and Input Method Editors.
				9 Reserved for typical keyboard status or keyboard errors. Sent as a member of the keyboard array. Not a physical key.
				10 Windows key for Windows 95, and “Compose.”
				11 Implemented as a non-locking key; sent as member of an array.
				12 Implemented as a locking key; sent as a toggle button. Available for legacy support; however, most systems should use the non-locking version of this key.
				13 Backs up the cursor one position, deleting a character as it goes.
				14 Deletes one character without changing position.
				15 No function
				16 No function
				17 No function
				18 No function
				19 No function
				20 No function
				21 Toggle Double-Byte/Single-Byte mode.
				22 Undefined, available for other Front End Language Processors.
				23 Windowing environment key, examples are Microsoft Left Win key, Mac Left Apple key, Sun Left Meta key
				24 Windowing environment key, examples are Microsoft􏰂 RIGHT WIN key, Macintosh􏰂 RIGHT APPLE key, Sun􏰂 RIGHT META key.
				25 Hangul/English toggle key. This usage is used as an input method editor control key on a Korean language keyboard.
				26 Hanja conversion key. This usage is used as an input method editor control key on a Korean language keyboard.
				27 Keypad Comma is the appropriate usage for the Brazilian keypad period (.) key. This represents the closest possible match, and system software should do the correct mapping based on the current locale setting.
				28 Keyboard International1 should be identified via footnote as the appropriate usage for the Brazilian forward-slash (/) and question-mark (?) key. This usage should also be renamed to either ""Keyboard Non-US / and ?"" or to ""Keyboard International1"" now that it's become clear that it does not only apply to Kanji keyboards anymore."
				29 Used on AS/400 keyboards.
				30 Defines the Katakana key for Japanese USB word-processing keyboards.
				31 Defines the Hiragana key for Japanese USB word-processing keyboards.
				32 Usage 0x94 (Keyboard LANG5) "Defines the Zenkaku/Hankaku key for Japanese USB word-processing keyboards."
				33 The symbol displayed will depend on the current locale settings of the operating system. For example, the US thousands separator would be a comma, and the decimal separator would be a period.
				34 The symbol displayed will depend on the current locale settings of the operating system. For example the US currency unit would be $ and the sub-unit would be ¢.