dji ROBOMASTER EP CORE Programming Manual page 118

Note:
" " " " "≠"
!= is the symbol for unequal to in programming language and has the same meaning as in mathematical language.
11. (0)<(0)
" " " "
(1) Description: Return True if the first value is less than the second value; otherwise, False is returned.
(2) Return value: Boolean
(3) Example: Approaching warning
When an object enters the area within 50 cm around the robot, the robot chassis LED will blink red.
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