Command
Syntax
Default
Notes
Set contrast and save
FE 91 [contrast]
254 145 [contrast]
0x80
128
Same as "set con-
trast" but saves
[contrast] as de-
fault.
Backlight on
FE 42 [minutes]
254 66 [minutes]
254 “B” [minutes]
on
R
Backlight
will
stay on for [min-
utes]. If [minutes]
=
0 backlight
will
stay
on
permanently.
Backlight off
FE 46
254 70
254 “F”
on
R
Turns off back-
light.
Set backlight brightness
FE 99 [brightness]
254 153 [brightness]
254
0xFF
255
Sets display back-
light brightness.
Set backlight brightness
and save
FE 98 [brightness]
254 152 [brightness]
254
0xFF
255
Same
as
“Set
backlight bright-
ness” but saves
[brightness]
as
default.
Load startup screen
FE 40 [40 char]
254 64 [40 char]
254 “@” [40 char]
Matrix Orbital
LK204-24-USB
Loads new startup
screen (40 char-
acters).
Screen
is remembered for
subsequent power
ups.
General purpose output off
FE 56 [gpo #]
254 86 [gpo #]
254 “V” [gpo #]
off
Turns a general
purpose
output
OFF. [gpo #] may
be from 1 to 6.
General purpose output on
FE 57 [gpo #]
254 87 [gpo #]
254 “W” [gpo #]
off
Turns a general
purpose
output
ON. [gpo #] may
be from 1 to 6.
Read module type
FE 37
254 55
254 “7”
see table
Reads the module
type.
Matrix Orbital
LK204-24-USB
39
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