7
Note:
the
user
can
not
power
off
PT200LS
if
the
power
key
is
disabled
by
protocol.
4
Frequency
LTE:
Band2
、
Band4
、
Band1
2
GPS:
1575.42MHz
WIFI:
2412-2462MHz
BLE: 2402-2480MHz
5
Trouble
shooting
and
Safety
info
5.1 Trouble shooting
5.2 Safety info
The
following
items
are
suggestion
for
safety
use,
please
pay
more
attention.
Please
do
not
disassemble
the
device
by
yourself.
Please
do
not
put
the
device
on
the
overheating
or
too
humid
place,
avoid
exposure
to
direct
sunlight.
Too
high
temperature
will
damage
the
device
or
even
cause
the
battery
explosion.
Trouble
Possible
Reason
Solution
Messages
can’t
be
reported
to
the
backend
server
by
Mobile
network.
APN
is
wrong.
Some
APN
can
not
visit
the
internet
directly.
Ask
the
network
operator
for
the
right
APN.
The
IP
address
or
port
of
the
backend
server
is
wrong.
Make
sure
the
IP
address
for
the
backend
server
is
an
identified
address
in
the
internet.
Unable
to
power
off
PT200LS
.
The
function
of
power
key
was
disabled
by
AT+GTFKS.
Enable
the
function
of
power
key
by
AT+GTFKS.
Battery
can
not
be
charged
The
battery
has
not
been
used
for
too
long
time
and
has
been
locked.
Using
a
external
power
source
with
3.6V
to
4.2V
DC
power
supply
to
active
the
battery
or
apply
for
after
sale
help.
PT200LS
can’t
fix
GPS
successfully.
The
GPS
signal
is
weak.
Please
move
PT200LS
to
a
place
with
open
sky.
It
is
better
to
let
the
top
surface
face
to
the
sky.
(The
same
surface
with
indication
LED)
