SimCom SIM900

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Step1:
P
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Step2:
C
endatc
Step3 :
I
Step4:
:
Step5:
N
Step6:
N
switch
O



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NOTE: 
A
onceth
e
64msO
N
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onnecton
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omputerss
e
I
nsertavali
d
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9
N
owpresst
h
N
owpresso
O
R applythe
A
fterpower
O
e
sim900/90
N
Time/300
0
HIGH
LOW
SIM900/90
0
p
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endofthe
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rialport.
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N
nboardSwit
pulseshow
n
O
Nthenet
w
0Amodemi
0
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m
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ltagesourc
N
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w
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sregistered
m
e. 
T
ON>1
n
Manual
M
P
INS.
a
ttheDB9s
e
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eatDC‐INj
a
u
rnontheb
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blinkatthe
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TOFF>=
M
ode:
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rialconnec
t
h
older.
a
ckofSM90
0
oard.
e
ssedforatl
e
rateof 64m
s
orkthenet
w
1.7Sec
t
orofthem
o
0
/900Amod
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ast1seca
n
s
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8
w
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rateof