LED commands

Mantis’s single onboard status LED is fully scriptable — there’s no fixed meaning attached to it, only what your script tells it to do:

Combine both with DELAY to build a blink pattern, e.g. to signal that a script is about to finish:

REM Simple blink pattern
LED_ON
DELAY 300
LED_OFF
DELAY 300

1REM Simple blink pattern
2LED_ON
3DELAY 300
4LED_OFF
5DELAY 300

Custom indications

You can combine LED commands with loops and conditional logic to create custom indicators. For example, you can blink the LED rapidly to tell the user that the script is paused and waiting for a physical button press before continuing.

REM Set typing speed for when we resume
SET_SPEED $Human

REM Loop infinitely until the button is pressed
LOOP
  REM Create a rapid blink pattern
  LED_ON
  DELAY 100
  LED_OFF
  DELAY 100
  
  REM Check if the user has pressed the button
  IF BUTTON_PRESSED THEN
    REM Exit the loop and continue the script
    BREAK
  END_IF
END_LOOP

REM The script only reaches here once the button is pressed
STRINGLN The button was pressed. Resuming execution!

1REM Set typing speed for when we resume
2SET_SPEED $Human
3
4REM Loop infinitely until the button is pressed
5LOOP
6  REM Create a rapid blink pattern
7  LED_ON
8  DELAY 100
9  LED_OFF
10  DELAY 100
11  
12  REM Check if the user has pressed the button
13  IF BUTTON_PRESSED THEN
14    REM Exit the loop and continue the script
15    BREAK
16  END_IF
17END_LOOP
18
19REM The script only reaches here once the button is pressed
20STRINGLN The button was pressed. Resuming execution!

See the LEDs hardware page for the LED itself.