Matrix Orbital LK202-25 Legacy - Manual (Page 30)

6.1.3 Set Contrast (254 80 [contrast]) (R)
This command sets the display’s contrast to [contrast], where [contrast] is a value between 0x00 and
0xFF (between 0 and 255). Lower values cause ‘on’ elements in the display area to appear lighter, while
higher values cause ‘on’ elements to appear darker. Lighting conditions will affect the actual value used
for optimal viewing. Individual display modules will also differ slightly from each other in appearance. In
addition, values for optimal viewing while the display backlight is on may differ from values used when
backlight is off.
6.1.4 Set Contrast and save (254 145[contrast])
This command works in exactly the same way as the "Set contrast" command. The only difference is
that it saves the contrast value in the non-volatile memory of the module, whereas the previous command
only changes the value until the next power down, unless ‘remember’ is set on.
6.1.5 Backlight on (254 66[minutes]) (R)
This command turns on the backlight for a time of [minutes] minutes. If [minutes] is zero (0), the
backlight will remain on indefinitely.
NOTE The factory default for backlight is on.
6.1.6 Backlight off (254 70) (R)
This command turns the backlight off.
6.1.7 Set Backlight brightness (254 153 [brightness]) (R)
This commands sets the display’s backlight brightness to [brightness], where [brightness] is a value
between 0x00 and 0xFF (between 0 and 255). Lower values will cause the backlight intensity to “dim”,
while higher values cause the backlight’s intensity to “brighten”.
6.1.8 Set Backlight brightness and save (254 152 [brightness])
This commands sets the display’s backlight brightness to [brightness] and saves it, where [brightness]
is a value between 0x00 and 0xFF (between 0 and 255). Lower values will cause the backlight intensity to
“dim”, while higher values cause the backlight’s intensity to “brighten”. Once this command has been sent,
[brightness] will be set accordingly on additional power ups.
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