Command / Comments

Suggested Pause

Example

Send Text

Serial.print(“Hello World!”);

?a

Home Cursor

Serial.print(“?a”);

?b

Destructive Backspace

Serial.print(“?b”); // backspace

?c#

Set Cursor Style:  0= none 2= blinking 3=underline

(“?c0″); // turn cursor off

?f

Clear Screen

Serial.print(“?f”);

?g

Beep (requires speaker on pin 6)

Serial.print(“?g”);

?h

Backup Cursor (Non-destructive backspace)

Serial.print(“?h”);

?i

Forward cursor

Serial.print(“?i”);

?j

Up cursor

Serial.print(“?j”);

?k

Down cursor

Serial.print(“?k”);

?l

Clear cursor line

Serial.print(“?k”);

?m

Carriage Return

Serial.print(“?m”);

?n

CRLF, carriage return & line feed,
cursor at start of next line, line cleared

Serial.print(“?n”);

?s#

Set tabs at # spaces

100 ms

Serial.print(“?s7″);
// set tab to 7 spaces

?t

Tab, advance one tab position

Serial.print(“?t”);

?x##

Position cursor on x column, (two characters are required), first column is column 0

Serial.print(“?x09″);
// cursor to column 10

?y#

Position cursor at y row, first row is row 0,
one digit only (no leading zero)

Serial.print(“?y3″);
// cursor to row 4

??

Display a “?”

Serial.print(“??”);

?!

Send direct command to LCD

Serial.print(“?!01″);

?B

Backlight Intensity – sets PWM value, two hex digits req. (00 to FF)

100 ms

Serial.print(“?BFF”);
// backlight on full brightness

?D#

Define Character “?D#1A001A001A001A00″ D# = character
# 0-7 then 8 two character hex digits representing
(5 bit values top to bottom)

100 ms

Serial.print(“?D31F001F001F001F00″);
// custom character 3
// every other line black

?#

Print a custom character
numerals 0-7 are valid

5 ms

Serial.print(“?3);
// print custom character 3

?H

High output on auxiliary digital pins: valid numbers are 4,5,6

Serial.print(“?H4″);
// aux pin 4 HIGH

?L

Low output on auxiliary digital pins: valid numbers are 4,5,6

Serial.print(“?L4″);

// aux pin 4 LOW

?G

Configure for LCD geometry. Supported formats:
2X16, 2X20, 2X24, 2X40, 4X16 and 4X20.

Serial.print(“?G216″);
// configure driver for 2 x 16 LCD

Ganging up commands is OK, except for commands requiring a following  pause

Serial.print(“?x01?y1?fHello World”);
// cursor to beginning of line 1
// clear screen, print “Hello World”

Enhanced Commands

?>#

Enter BIG Number Mode (numbers only!) “?>3″ X # = 3 or 4 ,

# represents number of characters displayed. (20×4 LCD’s only)

100 ms

Serial.print(“?>4″);
// enter big number mode, 4 character option.

?<

Exit BIG number mode “?<”

Serial.print(“?<”);

?C#

Define custom boot screen line # = 0 – 3

100 ms

Serial.print(“?C0abcdefghijklmnopqrst”)

?S#

“?S0″ - display no screen on boot.
“?S1″  – display the configuration setting on boot
“?S2″ - display the user custom text screen on boot.

Serial.print(“?S2); // custom boot screen