Matrix Orbital LK204-25 Legacy - Manual (Page 29)

7.7Miscellaneous Commands
Table 7-4 Miscellaneous Commands
Command Syntax Default Notes
Clear display FE 58
254 88
254 'X' n/a Clears screen of text and graphics, places text
cursor at top left.
Set contrast FE 50 [contrast]
254 80 [contrast]
254 'P' [contrast] 0x80
128 Sets display contrast. Compensates for
viewing angle. Contrast is a value between 0
and 255 (hex 0 to FF). Larger = darker.
Backlight on FE 42 [minutes]
254 66 [minutes]
254 'B' [minutes] on Backlight will stay on for [minutes]. If [minutes]
= 0 backlight will stay on permanently.
Backlight off FE 46
254 70
254 'F' on Turns off backlight.
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. See section 2.2 for further
details.
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. See section 2.2 for further
details.
Read Version
Number FE 36
254 54
254 '6' Reads the firmware version number of the
module. Returns a 1-byte hex value.
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