Arduino onboard LED pin number as a constant

Question

To use the onboard LED on an Arduino one usually has to know the pin number (13 in most cases), but is there a constant in the Arduino IDE one can use as well?

So is it possible to use something like int LED = ONBOARDLED; instead of using int LED = 13;?

score 4 · Answer 1 · answered Mar 12 '16 at 19:24

4

Try LED_BUILTIN:

pins_arduino.h:static const uint8_t LED_BUILTIN = 13;

answered Mar 12 '16 at 19:24

Majenko

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score 4 · Accepted Answer · answered Mar 12 '16 at 19:24

4

#define LED_BUILTIN 13

(source)

answered Mar 12 '16 at 19:24

Gerben

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Arduino onboard LED pin number as a constant

2 Answers2