Why is ADR only relevant for nodes at fixed positions?

[arjanvanb (Arjan)]

@jezd

I read before about the challenges of say SF12 and having moving nodes?

One reference here:

@jpmeijers

From tests that I did the slowest data rate performs very bad on a mobile node. The best reason I can think of is that you get fading of the link as you move, and therefore long sequences of bit erasures with which the forward error correction can not deal. I’d rather send 10 packets at the fastest data rate, than one at the slowest. The short moment that you have a good link at least you’ll get one full packet through.

And as for:

@piair

and defaulting to SPF12 is not allowed.

I don’t know about that, but a fixed SF11 or SF12 is not allowed indeed.