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Kev
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1
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.
I
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r
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s
to
th
in
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w
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av
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t
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Fro
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7
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On
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n
icatio
n
s
p
r
o
to
co
ls
an
d
t
h
e
ap
p
licatio
n
b
y
e
x
p
o
s
es
u
n
i
v
er
s
al
A
P
I
;
th
er
ef
o
r
e,
d
ev
elo
p
er
s
ca
n
u
s
e
it
in
th
eir
ap
p
licatio
n
s
to
co
n
s
u
m
e
d
ata
f
r
o
m
t
h
i
n
g
s
.
R
az
za
q
u
e
d
escr
ib
ed
o
n
e
o
f
m
id
d
le
w
ar
e
d
esig
n
th
a
t
ad
d
r
ess
es
i
n
ter
o
p
er
ab
ilit
y
is
s
u
e
in
I
o
T
is
ev
e
n
t
-
b
ased
m
id
d
le
w
ar
e.
T
h
is
d
esi
g
n
also
p
r
o
v
id
es
s
o
m
e
ad
v
an
ta
g
e
s
i
n
r
eliab
il
it
y
,
av
ailab
ilit
y
,
r
ea
l
-
ti
m
e
p
er
f
o
r
m
an
ce
,
s
ca
lab
ilit
y
a
n
d
s
ec
u
r
it
y
[
8
]
.
B
ased
o
n
t
h
ese,
w
e
p
r
o
p
o
s
e
an
e
v
en
t
-
b
ased
m
id
d
le
w
ar
e
a
s
in
ter
m
ed
iar
y
m
u
lti
-
p
r
o
to
co
l
g
ate
w
a
y
(
a)
to
p
r
o
v
id
e
S
y
n
tact
ical
i
n
ter
o
p
er
ab
ilit
y
b
et
w
ee
n
d
ev
ices
u
s
in
g
C
o
A
P
an
d
MQ
T
T
p
r
o
to
co
l,
(
b
)
ex
ten
s
ib
le
ar
ch
itect
u
r
e
s
o
o
th
er
d
ev
elo
p
e
r
s
ca
n
ad
d
an
o
th
er
p
r
o
to
co
l
th
e
y
n
ee
d
,
(
c)
u
n
if
ied
A
P
I
b
ase
d
o
n
W
e
b
So
ck
et
to
ex
p
o
s
e
d
ata
f
r
o
m
d
e
v
ices.
T
h
is
ap
p
r
o
ac
h
ex
ten
d
s
w
eb
o
r
ien
t
ed
ab
ilit
y
to
p
er
f
o
r
m
r
ea
l
-
t
i
m
e
m
ess
a
g
i
n
g
an
d
h
elp
d
ev
elo
p
er
s
to
f
o
cu
s
o
n
t
h
eir
ap
p
licatio
n
r
ath
er
th
a
n
en
ab
lin
g
tec
h
n
o
lo
g
y
o
n
ea
c
h
d
ev
ice.
T
h
e
p
r
o
p
o
s
ed
m
id
d
le
w
ar
e
h
as b
ee
n
i
m
p
le
m
e
n
ted
an
d
v
alid
ated
t
h
r
o
u
g
h
a
n
ex
ten
s
i
v
e
p
er
f
o
r
m
a
n
ce
ev
al
u
at
io
n
.
T
h
e
r
em
ai
n
d
e
r
o
f
t
h
i
s
p
ap
er
is
o
r
g
an
ized
a
s
f
o
llo
w
s
:
a
d
i
s
c
u
s
s
io
n
o
f
p
r
ev
io
u
s
w
o
r
k
t
h
at
h
as
tr
ied
to
ad
d
r
ess
th
ese
p
r
o
b
lem
s
i
n
s
ec
tio
n
2
,
an
o
v
er
v
ie
w
o
f
t
h
e
m
id
d
le
w
ar
e
t
h
at
w
e
p
r
o
p
o
s
ed
in
s
ec
ti
o
n
3
,
ex
p
er
i
m
e
n
t
s
e
tu
p
i
n
s
ec
tio
n
4
,
r
esu
lt
ab
o
u
t
ex
p
er
i
m
en
t
an
d
ev
al
u
atio
n
in
s
ec
tio
n
5
an
d
t
h
e
co
n
cl
u
s
s
io
n
in
s
ec
tio
n
6
.
2.
RE
L
AT
E
D
WO
RK
S
I
n
t
h
is
s
ec
tio
n
,
w
e
p
r
ese
n
t
a
r
elate
d
w
o
r
k
to
o
u
r
I
o
T
m
id
d
le
w
ar
e;
f
ir
s
t,
w
e
an
al
y
ze
r
e
g
a
r
d
in
g
t
h
e
in
ter
o
p
er
ab
ilit
y
i
n
th
e
I
o
T
;
s
ec
o
n
d
,
ex
is
ti
n
g
m
id
d
le
w
ar
e
a
d
d
r
ess
ed
th
e
in
ter
o
p
er
ab
ilit
y
p
r
o
b
l
em
;
t
h
ir
d
,
w
e
f
o
cu
s
o
n
th
e
liter
at
u
r
e
r
eg
ar
d
in
g
en
ab
li
n
g
tec
h
n
o
lo
g
ies
w
eb
-
o
r
ien
ted
in
I
o
T
;
la
s
tl
y
,
liter
atu
r
e
f
o
r
th
e
ev
alu
a
tio
n
o
f
o
u
r
p
r
o
p
o
s
ed
m
i
d
d
le
w
ar
e.
I
n
[
9
]
I
t
is
m
en
t
io
n
ed
th
at
i
n
ter
o
p
er
ab
ilit
y
is
t
h
e
b
ig
g
est
t
h
r
ea
d
as
th
e
r
esu
l
t
o
f
a
h
u
g
e
v
ar
iet
y
o
f
co
n
n
ec
ted
d
ev
ice
th
at
w
ill
i
n
t
er
ac
t,
eith
er
ex
i
s
ti
n
g
o
n
e
o
r
t
o
b
e
d
is
co
v
er
ed
in
th
e
f
u
tu
r
e.
As
s
tated
b
y
Desai
[
1
0
]
,
an
I
o
T
a
r
ch
itectu
r
e
m
u
s
t
b
e
s
elf
-
co
n
tai
n
ed
an
d
p
r
o
v
i
d
e
in
teg
r
ated
an
d
ca
p
ab
le
tr
an
s
lat
io
n
o
f
v
ar
io
u
s
p
o
p
u
lar
m
e
s
s
a
g
i
n
g
p
r
o
to
co
ls
.
T
h
o
m
as
Z
ac
h
ar
iah
e
x
p
o
s
ed
a
p
r
o
b
lem
f
o
r
I
o
T
w
h
ich
i
s
e
x
is
t
in
g
m
id
d
le
w
ar
e
(
g
ate
w
a
y
a
n
d
ap
p
licatio
n
)
m
o
s
tl
y
ca
n
o
n
l
y
b
e
u
s
ed
b
y
o
n
e
p
ar
ticu
lar
t
y
p
e
o
f
d
ev
ice.
Fo
r
ex
a
m
p
le,
th
e
s
m
ar
t
w
atc
h
as
A
p
p
le
W
atch
,
Fit
b
it,
an
d
Mo
to
3
6
0
r
eq
u
ir
es
ce
r
tain
ap
p
licatio
n
s
as
a
g
ate
wa
y
to
co
n
n
ec
t
to
th
e
in
ter
n
e
t.
T
h
e
s
a
m
e
th
in
g
h
ap
p
en
ed
o
n
t
h
e
s
m
ar
t
li
g
h
t
b
u
lb
as
P
h
ilip
s
Hu
e
t
h
at
r
eq
u
ir
e
s
s
p
ec
if
ic
d
ev
ice
s
a
n
d
ap
p
licatio
n
s
to
o
p
er
ate.
T
o
o
v
er
co
m
e
th
i
s
p
r
o
b
le
m
,
r
esear
c
h
er
s
o
f
f
er
a
g
ate
w
a
y
to
t
h
e
ar
ch
itect
u
r
al
co
n
ce
p
t
s
m
ar
tp
h
o
n
e
b
ased
o
n
B
lu
eto
o
th
L
o
w
E
n
er
g
y
(
B
L
E
)
an
d
I
P
v
6
[
1
1
]
.
Gu
in
ar
d
in
tr
o
d
u
ce
d
a
s
e
m
a
n
tic
g
ate
w
a
y
w
h
ic
h
p
r
o
v
id
es
tr
an
s
latio
n
f
u
n
ctio
n
b
et
w
ee
n
w
id
el
y
u
s
ed
MQ
T
T
,
XM
PP
,
an
d
C
o
A
P
p
r
o
to
co
ls
an
d
ex
p
o
s
in
g
p
h
y
s
i
ca
l
d
ev
ice
a
s
a
R
E
ST
f
u
l
r
eso
u
r
ce
,
b
u
t
d
o
n
o
t
f
o
cu
s
o
n
th
e
i
n
ter
ac
tio
n
s
o
f
th
e
g
at
e
w
a
y
w
it
h
e
x
ter
n
a
l
u
s
er
s
[
1
2
]
.
R
az
za
q
u
e
[
8
]
clas
s
i
f
ies
m
id
d
l
e
w
ar
e
‟s
r
eq
u
ir
e
m
e
n
t
s
i
n
to
t
h
r
ee
.
First,
f
u
n
c
tio
n
al
r
eq
u
ir
e
m
e
n
ts
w
h
ich
r
eq
u
ir
e
a
m
id
d
le
w
ar
e
to
b
e
u
s
ed
b
y
a
v
ar
iet
y
o
f
d
ev
ices
w
it
h
ea
s
e
w
it
h
o
u
t
h
a
v
i
n
g
to
p
ay
atten
t
io
n
to
tech
n
o
lo
g
y
a
n
d
d
ata
m
o
d
el
u
s
ed
b
y
t
h
e
d
ev
ice;
s
ec
o
n
d
,
n
on
-
f
u
n
ctio
n
al
r
eq
u
ir
e
m
en
ts
i
n
clu
d
in
g
r
ea
l
-
ti
m
e,
r
eliab
ilit
y
,
s
ca
lab
ilit
y
,
av
a
ila
b
ilit
y
,
s
ec
u
r
it
y
a
n
d
p
r
iv
ac
y
,
an
d
ea
s
e
-
of
-
d
ep
lo
y
m
en
t
;
L
astl
y
,
ar
c
h
itect
u
r
al
r
eq
u
ir
e
m
en
ts
i
n
cl
u
d
in
g
ad
ap
ti
v
e
an
d
co
n
tex
t
-
a
w
ar
e
n
es
s
,
in
t
er
o
p
er
a
b
ilit
y
,
au
to
n
o
m
o
u
s
b
e
h
av
io
r
,
an
d
s
er
v
ice
-
b
ased
.
Ou
r
ap
p
r
o
ac
h
f
o
cu
s
es
o
n
s
y
n
tactica
l
in
ter
o
p
er
ab
ilit
y
p
r
o
b
lem
an
d
en
h
a
n
ce
s
e
x
is
t
i
n
g
w
eb
-
o
r
ien
ted
b
y
p
r
o
v
id
in
g
r
ea
l
-
ti
m
e
co
m
m
u
n
ic
atio
n
.
Fo
r
ev
alu
at
io
n
m
eth
o
d
,
R
ez
a
h
as c
o
n
d
u
cted
r
esear
ch
r
elate
d
to
in
ter
o
p
er
ab
ilit
y
test
i
n
g
m
e
t
h
o
d
.
Fro
m
s
ev
er
al
tes
tin
g
m
et
h
o
d
s
,
in
ter
o
p
er
ab
ilit
y
as
s
es
s
m
e
n
t
m
et
h
o
d
o
lo
g
y
is
t
h
e
o
n
l
y
o
n
e
t
h
at
i
n
clu
d
e
s
d
escr
ip
tiv
e
test
(
Yes
/
No
)
an
d
q
u
alitativ
e
test
in
g
[
1
3
]
.
Din
esh
u
s
e
d
s
e
v
er
al
test
s
to
ev
al
u
ate
th
e
p
er
f
o
r
m
a
n
ce
o
f
C
O
A
P
an
d
MQ
T
T
v
ia
co
m
m
o
n
m
id
d
le
w
ar
e
.
He
also
e
x
a
m
i
n
e
I
n
f
lu
en
ce
o
f
p
ac
k
et
lo
s
s
o
n
d
ela
y
a
n
d
d
ata
tr
a
n
s
f
er
,
o
v
er
h
ea
d
f
o
r
v
ar
io
u
s
m
es
s
ag
e
s
izes
an
d
h
o
w
m
id
d
le
w
ar
e
ad
a
p
tiv
el
y
c
h
an
g
e
it
s
p
r
o
to
co
l b
ased
o
n
th
e
n
et
w
o
r
k
co
n
d
itio
n
.
T
h
is
m
eth
o
d
also
m
ea
s
u
r
es
t
h
e
p
er
f
o
r
m
a
n
ce
o
f
th
e
s
y
s
te
m
s
u
c
h
as
m
e
s
s
a
g
e
d
eliv
er
y
a
n
d
late
n
c
y
j
u
s
t
lik
e
in
[
7
]
.
T
h
er
ef
o
r
e,
in
th
i
s
p
ap
er
,
w
e
u
s
e
th
i
s
m
eth
o
d
to
ev
alu
ate
o
u
r
m
id
d
le
w
ar
e
in
ter
m
s
o
f
in
ter
o
p
er
ab
ilit
y
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
n
t J
E
lec
&
C
o
m
p
E
n
g
,
Vo
l.
8
,
No
.
5
,
Octo
b
er
2
0
1
8
:
378
4
–
37
92
3786
3.
P
RO
P
O
SE
D
M
I
DDLE
WAR
E
ARCH
I
T
E
CT
U
RE
T
h
e
p
r
o
p
o
s
ed
m
id
d
le
w
ar
e
ar
ch
itect
u
r
e
is
i
m
p
le
m
en
ted
u
s
i
n
g
th
e
"
E
n
d
s
to
m
id
d
le"
m
o
d
el.
T
h
er
e
ar
e
th
r
ee
m
ain
f
u
n
ctio
n
s
:
s
e
n
s
o
r
g
ate
w
a
y
,
s
er
v
ice
u
n
it,
a
n
d
ap
p
licatio
n
g
a
t
e
w
a
y
as
il
lu
s
tr
ate
d
in
Fi
g
u
r
e
1
.
T
h
e
ar
ch
itect
u
r
e
in
tr
o
d
u
ce
s
an
ap
p
r
o
ac
h
w
h
ic
h
i
m
p
le
m
e
n
ti
n
g
p
u
b
lis
h
-
s
u
b
s
cr
ib
e
p
atter
n
to
co
n
n
ec
t
C
o
A
P
an
d
MQ
T
T
en
ab
led
d
ev
ices th
e
n
e
x
p
o
s
in
g
t
h
eir
d
ata
th
r
o
u
g
h
W
e
b
S
o
ck
et
A
P
I
.
Fig
u
r
e
1
.
Mid
d
le
w
ar
e
a
r
ch
itec
tu
r
e
Fu
r
t
h
er
ex
p
lan
at
io
n
o
f
ea
c
h
co
m
p
o
n
en
t a
n
d
h
o
w
it
w
o
r
k
s
w
il
l b
e
d
escr
ib
ed
as f
o
llo
w
s
:
a.
Sen
s
o
r
g
a
te
w
a
y
T
h
is
co
m
p
o
n
en
t
co
n
s
i
s
ts
o
f
t
w
o
g
a
te
w
a
y
s
;
ea
c
h
is
r
esp
o
n
s
ib
le
f
o
r
h
an
d
li
n
g
th
e
in
co
m
i
n
g
m
e
s
s
a
g
e
f
r
o
m
C
o
A
P
o
r
MQ
T
T
en
ab
le
d
d
ev
ices,
r
esp
ec
tiv
el
y
.
A
s
s
t
ate
-
of
-
t
h
e
-
ar
t
o
f
p
u
b
lis
h
/s
u
b
s
cr
ib
e
p
atter
n
,
ea
ch
m
es
s
ag
e
s
h
o
u
ld
h
av
e
a
to
p
ic;
MQ
T
T
h
as
th
is
to
p
ic
b
y
n
at
u
r
e
s
in
ce
it
i
m
p
le
m
e
n
t
s
p
u
b
lis
h
/
s
u
b
s
cr
ib
e
to
o
.
On
th
e
o
th
er
h
a
n
d
,
w
e
h
a
v
e
to
ex
p
o
s
e
C
o
A
P
r
eso
u
r
ce
as
to
p
ics.
Fo
r
ex
am
p
le,
if
t
h
e
to
p
ic‟
s
n
a
m
e
is
k
i
tch
e
n
,
s
o
w
e
ca
n
p
u
b
lis
h
a
m
e
s
s
a
g
e
i
n
t
h
e
to
p
ic
b
y
d
o
in
g
a
P
OST
r
eq
u
est at
/to
p
ics/
k
itc
h
e
n
.
T
h
e
co
m
p
lete
p
r
o
ce
s
s
o
n
h
o
w
a
g
ate
w
a
y
h
a
n
d
le
s
i
n
co
m
i
n
g
m
e
s
s
a
g
e
i
s
s
h
o
w
n
in
F
g
u
r
e
2
.
Af
ter
r
ec
eiv
in
g
a
m
e
s
s
a
g
e
f
r
o
m
C
o
A
P
o
r
MQ
T
T
d
ev
ice,
it
w
il
l
ch
ec
k
t
h
e
in
te
g
r
it
y
o
f
UR
L
a
n
d
p
ass
th
e
d
ata
to
Ser
v
ice
U
n
it.
Fig
u
r
e
2
.
Sen
s
o
r
g
ate
w
a
y
l
o
g
i
c
Fig
u
r
e
3
.
Ser
v
ice
u
n
it lo
g
ic
b.
Ser
v
ice
u
n
it
Ser
v
ice
u
n
it
p
r
o
v
id
es
A
P
I
‟
s
f
o
r
Sen
s
o
r
an
d
A
p
p
licatio
n
g
a
t
e
w
a
y
to
p
u
b
li
s
h
o
r
s
u
b
s
cr
ib
e
a
p
ar
ticu
lar
to
p
ic
to
R
ed
is
.
T
h
i
s
A
P
I
‟
s
all
o
w
d
e
v
elo
p
er
s
o
r
u
s
er
s
to
ad
d
th
eir
o
w
n
p
r
o
to
co
l
ap
ar
t
f
r
o
m
C
o
A
P
an
d
M
QT
T
.
R
ed
is
h
as
a
n
i
m
p
o
r
ta
n
t
r
o
le
i
n
o
u
r
s
y
s
te
m
a
s
a
b
r
o
k
er
o
f
t
h
e
p
u
b
lis
h
a
n
d
s
u
b
s
cr
ib
e
m
ec
h
an
i
s
m
as
s
h
o
w
n
i
n
T
ab
le
1
.
T
ab
le
1
.
Ser
v
ice
Un
it
‟
s
A
P
I
I
n
t
e
r
f
a
c
e
D
e
scri
p
t
i
o
n
f
i
n
d
(
t
o
p
i
c
)
su
b
s
c
r
i
b
e
(
k
e
y
)
sav
e
(
k
e
y
,
p
a
y
l
o
a
d
)
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t
J
E
lec
&
C
o
m
p
E
n
g
I
SS
N:
2088
-
8708
A
n
E
ve
n
t
-
b
a
s
ed
Mid
d
lew
a
r
e
fo
r
S
yn
ta
ctica
l I
n
tero
p
era
b
ilit
y
(
E
ko
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a
kti
P
r
a
mu
ka
n
t
o
r
o
)
3787
As
s
h
o
w
n
in
F
i
g
u
r
e
3
,
an
ap
p
licatio
n
s
u
b
s
cr
ib
es
a
p
ar
ticu
lar
to
p
ic
th
r
o
u
g
h
A
p
p
licatio
n
g
ate
w
a
y
.
Un
d
er
th
e
h
o
o
d
,
f
ir
s
t,
Ser
v
ic
e
u
n
it
f
i
n
d
s
ex
is
ti
n
g
d
ata
f
o
r
th
at
to
p
ic
an
d
r
etu
r
n
s
it
d
ir
ec
t
ly
i
f
th
er
e
i
s
o
n
e.
A
lter
n
ati
v
el
y
,
Ser
v
ice
la
y
er
will
m
a
k
e
a
s
u
b
s
cr
ip
tio
n
a
n
d
s
et
a
lis
ten
er
to
R
ed
is
u
s
i
n
g
t
h
e
t
o
p
ic
as
k
e
y
.
O
n
t
h
e
o
th
er
s
id
e,
w
h
e
n
a
d
ev
ice
p
u
b
l
is
h
es
m
e
s
s
a
g
e
th
r
o
u
g
h
Sen
s
o
r
g
ate
w
a
y
,
Ser
v
ice
u
n
it
w
ill
s
a
v
e
an
d
p
u
b
lis
h
it
to
R
ed
is
.
A
t
t
h
e
s
a
m
e
t
i
m
e,
e
v
e
r
y
Ser
v
ice
u
n
it
t
h
at
s
et
lis
ten
er
ea
r
lier
g
et
n
o
ti
f
ied
ab
o
u
t
n
e
w
d
ata
a
n
d
p
ass
it
th
r
o
u
g
h
to
A
p
p
licatio
n
g
ate
w
a
y
.
c.
A
p
p
licatio
n
Ga
te
w
a
y
T
h
is
co
m
p
o
n
e
n
t
b
asica
ll
y
e
x
p
o
s
e
s
s
ev
er
al
A
P
I
s
f
o
r
ap
p
licatio
n
s
to
co
n
s
u
m
e
d
ata
f
r
o
m
I
o
T
d
ev
ice
s
u
s
i
n
g
W
eb
S
o
ck
e
t p
r
o
to
co
l.
T
ab
le
2
s
h
o
w
s
t
h
e
ap
p
licatio
n
g
ate
w
a
y
‟
s
A
P
I
.
T
ab
le
2
.
A
p
p
licatio
n
G
ate
w
a
y
‟
s
A
P
I
I
n
t
e
r
f
a
c
e
D
e
scri
p
t
i
o
n
c
o
n
n
e
c
t
(
)
su
b
s
c
r
i
b
e
(
t
o
p
i
c
)
Giv
e
n
an
ap
p
licatio
n
t
h
at
n
ee
d
s
to
r
ea
d
d
ata
f
r
o
m
I
o
T
d
ev
ices,
it
s
h
o
u
ld
co
n
n
ec
t
to
o
u
r
m
id
d
le
w
ar
e
f
ir
s
t
s
o
it
ca
n
s
u
b
s
cr
ib
e
a
to
p
ic.
E
v
er
y
ti
m
e
an
I
o
T
d
ev
ice
s
en
d
d
ata
u
s
i
n
g
th
e
s
a
m
e
to
p
ic
to
m
id
d
le
w
ar
e,
t
h
is
ap
p
licatio
n
w
i
ll r
ec
eiv
e
t
h
e
s
a
m
e
d
ata
in
r
ea
l
-
ti
m
e
(
F
ig
u
r
e
4
)
.
Fig
u
r
e
4
.
A
p
p
licatio
n
g
ate
w
a
y
l
o
g
ic
4.
E
XP
E
R
I
M
E
NT
S
E
T
UP
I
n
o
r
d
er
to
ex
a
m
i
n
e
o
u
r
m
id
d
l
e
w
ar
e,
w
e
b
u
ild
a
s
y
s
te
m
co
n
s
is
t
i
n
g
o
f
s
e
v
er
al
co
m
p
o
n
en
ts
w
h
ic
h
ar
e
te
m
p
er
atu
r
e
a
n
d
h
u
m
id
it
y
s
en
s
o
r
s
,
o
u
r
m
id
d
le
w
ar
e
o
n
R
asp
b
er
r
y
P
i,
W
eb
ap
p
licatio
n
,
an
d
Mo
n
g
o
DB
as
d
ata
s
to
r
ag
e.
O
u
r
m
id
d
le
w
ar
e
co
n
n
e
cts
I
o
T
d
ev
ices
s
u
ch
as
s
en
s
o
r
an
d
ap
p
licatio
n
,
a
s
s
h
o
w
n
in
f
ig
u
r
e
5
.
I
ts
m
ai
n
r
esp
o
n
s
ib
ilit
y
i
s
to
tak
e
i
n
co
m
in
g
d
ata
f
r
o
m
t
h
e
s
en
s
o
r
an
d
n
o
tify
s
u
b
s
cr
ib
er
o
f
n
e
w
to
p
ic,
w
h
ic
h
is
d
escr
ib
ed
as f
o
llo
w
s
:
T
h
e
clie
n
t c
o
n
n
ec
t
s
to
m
id
d
le
w
ar
e
th
r
o
u
g
h
W
eb
S
o
ck
et
an
d
s
u
b
s
cr
ib
es
f
o
r
u
p
d
ate
o
n
a
to
p
ic:
1.
T
h
e
w
eb
ap
p
licatio
n
r
eg
is
ter
s
to
g
et
an
u
p
d
ate
o
n
a
s
p
ec
i
f
ic
t
o
p
ic,
let
s
ay
t
h
e
to
p
ic
is
"
/to
p
ics/
k
i
tch
e
n
"
.
2.
T
h
er
e
is
a
n
e
w
e
v
en
t f
r
o
m
a
s
e
n
s
o
r
n
o
d
e
w
h
ic
h
d
eliv
er
s
n
e
w
d
ata
u
n
d
er
to
p
ic
"
/to
p
ics/
k
itc
h
en
"
.
3.
W
h
en
e
v
er
th
e
s
e
n
s
o
r
n
o
d
e
p
u
b
lis
h
e
s
n
e
w
d
ata
e
v
en
t
h
r
o
u
g
h
C
o
A
P
o
r
MQ
T
T
p
r
o
t
o
co
l,
it
is
f
o
r
w
ar
d
ed
to
th
e
Ser
v
ice
u
n
it;
4.
Ser
v
ice
u
n
it
s
to
r
es th
e
d
ata
an
d
p
u
b
lis
h
es
n
e
w
d
ata
to
th
e
s
u
b
s
cr
ib
er
w
ith
a
s
p
ec
if
ic
to
p
ic.
5.
Af
ter
g
o
t
u
p
d
ates,
w
eb
ap
p
s
d
is
p
la
y
d
ata
to
f
r
o
n
t
-
en
d
s
an
d
s
t
o
r
e
d
ata
o
n
Mo
n
g
o
DB
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8708
I
n
t J
E
lec
&
C
o
m
p
E
n
g
,
Vo
l.
8
,
No
.
5
,
Octo
b
er
2
0
1
8
:
378
4
–
37
92
3788
M
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ddl
e
w
a
r
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/
Ac
c
e
s
s
P
oi
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W
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b
-
a
pp
M
O
D
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6
M
O
D
V
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R
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2
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4
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H
Z
P
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+
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m
8
0
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/
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/
n
Fi
Wi
S
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or
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oAP
m
ong
oD
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M
O
D
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L
E
S
P
8
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6
M
O
D
V
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R
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NK
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m
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b
/
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/
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Fi
Wi
S
e
ns
or
M
Q
T
T
B
r
ow
s
e
r
1
4
2
3
5
6
Fig
u
r
e
5
.
S
y
s
te
m
a
r
ch
itect
u
r
e
4.
1
.
E
na
bli
ng
t
ec
hn
o
lo
g
ies a
nd
i
m
p
le
m
ent
a
t
io
n
a.
Sen
s
o
r
d
ev
ice
s
As
s
h
o
w
n
in
F
ig
u
r
e
7
,
w
e
u
se
t
w
o
id
en
tical
s
e
n
s
o
r
s
t
h
at
i
m
p
le
m
en
t
C
o
A
P
a
n
d
MQ
T
T
p
r
o
to
co
l.
A
ll
s
en
s
o
r
s
ar
e
b
u
ilt
u
s
i
n
g
No
d
e
MCU
(
E
SP
8
2
6
6
)
an
d
DHT
m
o
d
u
le.
Nex
t,
w
e
m
a
n
a
g
e
to
s
et
o
u
r
s
en
s
o
r
s
i
n
o
r
d
er
to
s
en
d
an
u
p
d
ate
ev
er
y
3
0
s
ec
o
n
d
s
.
T
h
e
d
ata
s
en
t b
y
s
e
n
s
o
r
f
o
llo
w
s
s
e
m
a
n
tic
as d
ep
icted
in
Fi
g
u
r
e
6
.
No
d
e
MQ
T
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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2
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8
-
8708
I
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P
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R
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Is se
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