ADR doesn't work (915 MHz Band - ABP)

[arjanvanb (Arjan)]

It seems I asked the same question for the very same code in another topic last year:

@martin_schilliger

@arjanvanb

By the way, what is port 13 used for?

if ((now & 512) != 0) {
  digitalWrite(13, HIGH);
}
else {
  digitalWrite(13, LOW);
}

Just a red LED

Great that this seems to fix ADR (or, downlinks in general) for you, but do you (or anyone) have any idea why? Are you using any sensors in your code?