Arduino Blink

Arduino
1

I don’t know if this is documented anywhere.

For those who want to try the classic Arduino Blink example, the Arduino GPIO for the USER LED is 31.

2

This is handy, worth mentioning also that the LED_BUILTIN macro is set for that LED as well.

3

I’d forgotten about LED_BUILTIN - that would have saved me interating through 32 GPIOS to find the one that worked!

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