NOT
the
b
since
afte
IF
au
usta
com
Now
the
c
TE:
A
HEX
str
baud
rate
of
e
it
is
used
fo
er
SIM900/90
uto
‐
baudin
art
up
the
ME
mmand
line.
connection
is
ring
such
as
“
f
115200
imm
or
synchroniz
00A
is
power
g
is
enabled,
E,
and
the
“A
s
established
“00
49
49
49
mediately
aft
zation
with
P
red
ON
and
u
d,
the
unsolic
prefix
no
AT”
d
and
you
ca
9
49
FF
FF
FF
ter
SIM900
is
PC
tool.
Only
unsolicited
re
ited
result
co
t
prefix
“at”
an
send
the
A
FF”
will
be
s
s
powered
on
y
enter
the
AT
esult
code
“R
odes
“RDY”
a
must
be
set
AT
‐
Comman
sent
out
thro
n.
The
string
T
commands
RDY”
is
receiv
and
so
on
are
at
the
begin
nds
to
the
GS
ugh
serial
po
g
shall
be
ign
s
through
ser
ved
from
seri
e
not
indicat
nning
of
each
SM
modem
ort
at
ored
rial
port
ial
port.
ted
when
h
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