Advanced
Miniature
CCD
Scan
Module
19
U
SER
’
S
M
ANUAL
Trigger
Command
Format
(Only
for
RS
‐
232C
and
USB
‐
Virtual
COM
Port)
Level
Trigger
Command
Command
Description
<ESC>A0<CR>
When
the
scanner
receives
this
command,
the
CCD/laser
would
light
up
and
start
scanning
barcodes
entering
its
scan
filed.
The
light
would
be
switched
off
when
the
scanner
receives
a
trigger
off
command.
Edge
Trigger
Command
Command
Description
<ESC>A0.mm<CR>
When
the
scanner
receives
this
command,
the
CCD/laser
would
light
up
and
start
scanning
barcodes
entering
its
scan
field.
The
light
would
remain
on
until
the
scanner
reads
a
barcode
or
until
“mm”
period
is
over
(mm=01~60,
unit:
second).
The
edge
trigger
command
is
not
controlled
by
the
trigger
off
command.
<ESC>A2<CR>
When
the
scanner
receives
this
command,
the
CCD/laser
light
would
light
up
and
remain
on
but
the
device
can
only
scan
once.
The
light
would
be
switched
off
when
the
scanner
receives
a
trigger
off
command.
<ESC>A2.mm<CR>
When
the
scanner
receives
this
command,
the
CCD/laser
light
would
light
up
and
remain
on
until
“mm”
period
is
over.
If
the
scanner
read
a
barcode
before
“mm”
period
is
over,
the
light
‐
off
countdown
would
re
‐
start.
The
scanner
is
not
controlled
by
the
trigger
off
command.
Trigger
Off
Command
Command
Description
<ESC>A1<CR>
The
CCD/laser
light
would
be
switched
off
when
the
scanner
receives
a
trigger
off
command.
Example:
Sending
<ESC>
“A0”
<CR>
(0x1b
0x41
0x30
0x0d)
to
scan
module
will
activate
the
module
for
scanning.
Sending
<ESC>
“A1”
<CR>
(0x1b
0x41
0x31
0x0d)
to
scan
module
will
turn
off
the
scan.