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e
co
n
tr
o
ller
is
u
s
ed
to
tr
a
n
s
m
it
th
e
p
u
r
ch
a
s
e
d
b
ill
s
er
iall
y
to
t
h
e
co
m
p
u
ter
av
ai
lab
le
in
t
h
e
u
s
in
g
Z
ig
B
ee
.
L
C
D
un
i
t:
I
n
th
i
s
p
r
o
j
ec
t
w
e
u
s
e
2
0
X4
L
C
D
Dis
p
la
y
f
o
r
d
is
p
la
y
in
g
t
h
e
cu
r
r
en
t
s
ca
n
n
ed
p
r
o
d
u
ct,
its
p
r
ice
an
d
th
e
to
tal
a
m
o
u
n
t f
o
r
th
e
ite
m
s
p
u
r
ch
ased
.
R
F
I
D
R
ea
d
er a
nd
T
a
g
:
B
asicall
y
t
h
er
e
ar
e
tw
o
k
i
n
d
s
o
f
R
FID
tag
s
,
th
e
y
ar
e
ac
tiv
e
an
d
p
ass
iv
e
ta
g
s
[
1
]
.
T
h
e
ac
tiv
e
tag
h
a
s
b
atter
y
li
f
e.
T
h
e
p
ass
iv
e
tag
s
h
as
n
o
b
atter
y
l
if
e.
I
n
t
h
i
s
p
r
o
j
ec
t,
w
e
u
s
e
p
ass
iv
e
tag
s
wh
ich
ar
e
a
f
f
ix
ed
to
ev
er
y
p
r
o
d
u
ct
in
t
h
e
m
all.
T
h
e
tag
s
u
s
ed
in
s
h
o
p
p
in
g
m
alls
h
av
e
a
n
te
n
n
a
s
p
r
esen
t
i
n
s
id
e
w
h
ic
h
h
a
v
e
a
r
an
g
e
o
f
o
n
e
m
e
ter
.
T
h
e
R
FID
r
ea
d
er
ca
n
d
etec
t
an
y
ta
g
w
h
ic
h
c
o
m
e
s
i
n
th
a
t
p
ar
ticu
lar
r
an
g
e
.
T
h
e
R
FID
r
ea
d
er
r
ea
d
s
th
e
co
d
e
in
th
e
f
o
r
m
o
f
h
ex
ad
ec
i
m
al
n
u
m
b
er
s
.
Z
ig
B
ee
:
Z
i
g
B
ee
Mo
d
u
le
is
a
co
s
t
ef
f
ec
ti
v
e,
lo
w
-
p
o
w
er
co
n
s
u
m
i
n
g
m
o
d
u
le,
w
h
ic
h
u
s
e
s
w
ir
el
ess
m
e
s
h
n
et
w
o
r
k
i
n
g
s
tan
d
ar
d
[
3
]
.
Z
i
g
B
ee
is
b
asicall
y
u
s
ed
f
o
r
s
ec
u
r
e
n
e
t
w
o
r
k
tr
a
n
s
m
i
s
s
io
n
b
u
t
it
h
a
s
s
lo
w
tr
an
s
m
is
s
io
n
r
ate.
Z
i
g
B
ee
h
as
a
tr
an
s
m
is
s
io
n
r
ate
o
f
2
5
0
⁄
,
b
est
s
u
i
ted
f
o
r
d
ata
tr
an
s
m
is
s
io
n
s
f
r
o
m
a
n
in
p
u
t d
ev
ice.
I
n
th
is
p
r
o
j
ec
t
Z
ig
B
ee
T
r
an
s
m
itter
is
u
s
ed
to
tr
an
s
m
it
t
h
e
b
il
l
to
th
e
P
C
a
v
ailab
le
n
ea
r
t
h
e
ex
it,
a
f
ter
th
e
b
ill
is
p
aid
th
e
P
C
u
s
ed
to
s
en
d
s
ig
n
al
to
co
n
tr
o
ller
i
n
th
e
tr
o
lle
y
t
h
r
o
u
g
h
Z
i
g
B
ee
r
ec
eiv
er
,
in
o
r
d
er
to
tu
r
n
th
e
L
E
D
Gr
ee
n
.
K
ey
p
a
d
Unit:
In
th
i
s
u
n
it
w
e
h
av
e
t
h
r
ee
k
e
y
s
:
i)
T
o
Add o
r
Re
m
o
v
e
pro
du
ct
T
h
e
f
ir
s
t
t
w
o
k
e
y
s
ar
e
u
s
ed
to
s
elec
t th
e
t
y
p
e
o
f
m
o
d
e
w
h
eth
er
to
ad
d
o
r
r
em
o
v
e
a
p
ar
ticu
la
r
p
r
o
d
u
ct.
ii)
T
o
t
ra
ns
m
it
t
he
bil
l
T
h
e
th
ir
d
k
e
y
is
to
s
e
n
d
th
e
b
ill
s
er
iall
y
to
t
h
e
co
m
p
u
te
r
w
h
ic
h
is
n
ea
r
t
h
e
e
x
it
u
s
i
n
g
Z
ig
B
ee
tr
an
s
m
is
s
io
n
,
w
h
e
n
t
h
e
k
e
y
i
s
p
r
ess
ed
f
o
r
th
e
f
ir
s
t
ti
m
e
t
h
e
m
icr
o
co
n
tr
o
ller
w
i
ll
as
k
f
o
r
co
n
f
ir
m
at
io
n
f
o
r
s
en
d
i
n
g
t
h
e
b
ill.
W
h
e
n
th
e
k
e
y
is
p
r
ess
ed
ag
ai
n
th
e
b
ill i
s
tr
an
s
m
itted
.
L
E
D
un
i
t:
T
h
e
L
E
D
u
n
it
g
lo
w
s
i
n
r
ed
co
lo
r
w
h
e
n
t
h
e
p
u
r
ch
a
s
e
is
d
o
n
e.
Af
ter
t
h
e
p
u
r
ch
a
s
e
is
o
v
er
,
t
h
e
cu
s
to
m
er
m
o
v
e
s
to
th
e
b
illi
n
g
co
u
n
ter
t
o
p
ay
t
h
e
co
r
r
esp
o
n
d
in
g
p
u
r
c
h
ased
a
m
o
u
n
t.
W
h
e
n
t
h
e
a
m
o
u
n
t
f
o
r
th
e
p
u
r
c
h
ase
is
p
aid
at
t
h
e
b
illi
n
g
co
u
n
ter
t
h
e
L
E
D
t
u
r
n
s
i
n
to
Gr
ee
n
co
lo
r
b
y
in
ter
r
u
p
t
u
s
i
n
g
Z
i
g
B
ee
tr
an
s
m
i
s
s
io
n
f
r
o
m
t
h
e
P
C
.
T
h
is
Gr
ee
n
L
i
g
h
t
in
d
icate
s
th
at
th
e
tr
o
lle
y
ca
n
b
e
u
n
lo
ad
ed
an
d
it
is
r
ea
d
y
to
b
e
u
s
ed
b
y
a
n
o
th
er
cu
s
to
m
er
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
9
-
4864
IJ
R
E
S
Vo
l.
5
,
No
.
2
,
J
u
l
y
20
1
6
:
8
3
–
8
9
86
5.
F
L
O
W
CH
ART
6.
WO
RK
I
N
G
O
F
T
H
E
RF
I
D
T
RO
L
L
E
Y
W
h
en
t
h
e
c
u
s
to
m
er
en
ter
s
th
e
Sh
o
p
p
in
g
m
a
ll,
th
e
c
u
s
to
m
er
s
p
ick
s
u
p
t
h
e
Au
to
m
atic
B
ill
in
g
tr
o
lle
y
an
d
th
e
L
E
D
in
t
h
e
tr
o
lle
y
g
lo
w
s
in
g
r
e
en
co
lo
r
w
h
ic
h
s
h
o
ws th
e
tr
o
lle
y
i
s
i
n
w
o
r
k
in
g
m
o
d
e.
i)
T
h
e
L
C
D
i
n
th
e
tr
o
lle
y
d
is
p
la
y
s
t
h
e
w
elco
m
e
n
o
te
to
th
e
cu
s
to
m
er
,
an
d
it
w
aits
f
o
r
th
e
cu
s
to
m
er
to
s
ca
n
th
e
ar
ticle.
ST
A
R
T
L
C
D
I
n
itia
lis
atio
n
Scan
t
h
e
p
r
o
d
u
ct
R
FID
co
d
e
C
o
m
p
ar
e
th
e
co
d
e
w
it
h
t
h
e
lo
o
k
u
p
tab
le
Dis
p
la
y
t
h
e
d
etail
s
i
n
t
h
e
LC
D
a
n
d
a
d
d
th
e
p
r
o
d
u
ct
to
th
e
p
r
o
d
u
ct
lis
t
No
I
n
ter
r
u
p
t f
o
r
b
illi
n
g
T
o
ad
d
o
r
r
em
o
v
e
p
r
o
d
u
ct
p
r
e
s
s
t
h
e
k
e
y
s
Yes
No
T
r
an
s
m
it t
h
e
b
ill to
th
e
P
C
u
s
i
n
g
Z
I
GB
E
E
W
h
en
t
h
e
b
ill is
p
aid
th
e
led
t
u
r
n
s
g
r
ee
n
i
n
co
lo
r
ST
OP
Evaluation Warning : The document was created with Spire.PDF for Python.
IJ
R
E
S
I
SS
N:
2088
-
8708
Lo
w
C
o
s
t
Micr
o
co
n
tr
o
ller
B
a
s
ed
A
u
to
ma
tic
B
illi
n
g
S
ystem
w
ith
P
r
o
tective
…
(
C
.
S
u
g
a
n
th
i
E
va
n
g
elin
e
)
87
ii)
As
th
e
c
u
s
to
m
er
d
r
o
p
s
th
e
p
r
o
d
u
ct
th
at
h
e/s
h
e
p
u
r
ch
a
s
es
i
n
to
th
e
tr
o
lle
y
,
T
h
e
R
FID
r
ea
d
er
d
etec
ts
th
e
R
FID
ta
g
p
r
esen
t
w
it
h
t
h
e
p
r
o
d
u
ct.
iii)
As s
o
o
n
as t
h
e
f
ir
s
t a
r
ticle
is
s
ca
n
n
ed
t
h
e
L
E
D
t
u
r
n
s
i
n
to
R
e
d
co
lo
r
.
iv
)
T
h
e
R
FID
r
ea
d
er
s
en
d
s
t
h
e
s
c
an
n
ed
i
n
f
o
r
m
atio
n
to
th
e
m
icr
o
co
n
tr
o
ller
p
r
esen
t
in
th
e
tr
o
ll
e
y
i
n
th
e
f
o
r
m
o
f
Hex
ad
ec
i
m
al
co
d
e.
v)
T
h
e
m
ic
r
o
co
n
tr
o
ller
co
m
p
ar
es
th
e
o
b
tain
ed
i
n
f
o
r
m
atio
n
w
it
h
th
e
v
alu
e
p
r
esen
t
i
n
t
h
e
lo
o
k
u
p
tab
le
f
o
u
n
d
in
th
e
m
e
m
o
r
y
.
v
i)
T
h
e
lo
o
k
u
p
tab
le
co
n
tai
n
s
all
t
h
e
i
n
f
o
r
m
atio
n
r
e
g
ar
d
in
g
ea
ch
an
d
ev
er
y
p
r
o
d
u
ct
alo
n
g
w
it
h
its
R
FID
ta
g
s
h
ex
ad
ec
i
m
al
co
d
e.
v
ii)
W
h
en
t
h
e
co
d
e
m
atc
h
es,
t
h
e
p
r
o
d
u
ct
d
etails
alo
n
g
w
it
h
its
p
r
ice
an
d
to
tal
a
m
o
u
n
t
o
f
p
u
r
c
h
ase
i
s
d
is
p
la
y
ed
in
t
h
e
L
C
D.
v
iii)
W
h
en
a
p
r
o
d
u
ct
n
ee
d
s
to
b
e
ad
d
ed
o
r
r
em
o
v
ed
,
t
h
at
p
ar
ticu
lar
ac
tio
n
is
s
elec
ted
u
s
i
n
g
„
a
d
d
o
r
r
em
o
v
e
p
r
o
d
u
ct‟
k
e
y
s
p
r
esen
t i
n
t
h
e
tr
o
lle
y
.
ix
)
Af
ter
t
h
e
p
u
r
c
h
ase
i
s
o
v
er
,
t
h
e
cu
s
to
m
er
n
ee
d
s
to
p
r
ess
t
h
e
t
h
ir
d
k
e
y
,
to
s
e
n
d
th
e
b
ill,
t
h
e
m
icr
o
co
n
tr
o
ller
ask
s
f
o
r
co
n
f
ir
m
atio
n
f
o
r
tr
an
s
m
itti
n
g
th
e
b
ill.
x)
T
o
co
n
f
ir
m
t
h
e
en
d
o
f
p
u
r
c
h
a
s
e
p
r
ess
th
e
s
a
m
e
k
e
y
a
g
ain
,
w
h
e
n
p
r
ess
ed
th
e
b
ill
is
s
er
ial
l
y
tr
an
s
m
itted
alo
n
g
w
it
h
t
h
eir
tr
o
lle
y
n
u
m
b
e
r
u
s
i
n
g
Z
i
g
B
ee
Mo
d
u
le.
x
i)
T
h
e
cu
s
to
m
er
n
o
w
n
ee
d
s
to
g
o
n
ea
r
th
e
ex
it a
n
d
p
a
y
t
h
eir
b
ill
an
d
g
ets t
h
eir
p
u
r
ch
a
s
ed
ite
m
u
n
lo
ad
ed
.
x
ii)
As
t
h
e
c
u
s
to
m
er
p
a
y
s
t
h
e
b
ill
t
h
e
L
E
D
m
o
d
u
le
t
u
r
n
s
Gr
ee
n
a
g
ain
to
i
n
d
icate
t
h
e
tr
o
lle
y
i
s
r
ea
d
y
f
o
r
n
e
x
t
p
u
r
ch
ase.
7.
ADVA
N
T
A
G
E
S
i)
R
ed
u
ce
s
t
h
e
q
u
e
u
e
in
t
h
e
b
illi
n
g
co
u
n
ter
a
n
d
th
er
eb
y
u
s
i
n
g
t
i
m
e
e
f
f
ec
t
iv
el
y
.
ii)
T
h
e
im
p
le
m
e
n
tatio
n
o
f
s
m
ar
t t
r
o
lley
r
ed
u
ce
s
th
e
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[1
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).
Evaluation Warning : The document was created with Spire.PDF for Python.