Matrix Orbital LCD/VFD Legacy - Manual (Page 28)

Command Syntax Default Notes
Backlight on FE 42 [minutes]
254 66 [minutes] 254 ’B’
[minutes]
on Backlight will
stay on for [min-
utes]. If [minutes]
= 0 backlight
will stay on
permanently.
Backlight off FE 46
254 70
254 ’F’
on Turns off back-
light.
Load startup screen FE 40 [32 char]
254 64 [32 char]
254 ’@’ [32 char]
Matrix Orbital
LCD4041
Loads new startup
screen (32 char-
acters). Screen
is remembered for
subsequent power
ups.
General purpose output off FE 56
254 86
254 ’V’
off Turns the general
purpose output
OFF.
General purpose output on FE 57
254 87
254 ’W’
off Turns the general
purpose output
ON.
Set I 2 C address FE 33 [address]
254 51 [address]
254 ’3’ [address]
0x50 Value is write ad-
dress and must be
even, read address
is 1 higher.
Read module type FE 37
254 55
254 ’7’
see table Reads the module
type. Returns a 1-
byte value.
Set RS-232 port speed FE 39 [speed]
254 57 [speed]
254 ’9’ [speed]
19,200 baud Sets RS-232
speed.
Set Serial Number FE 34 [byte1][byte2]
254 52 [byte1][byte2]
254 ’4’ [byte1][byte2]
This is a one-
time-use com-
mand which
works only on
units without
factory set serial
numbers.
Read Serial Number FE 35
254 53
254 ’5’
Reads the two
byte serial num-
ber of the module.
Matrix Orbital LCD4041 25