A viewer question has given me an opportunity to revisit the R9 in order to add Smart Port telemetry. Consider this a part 1 video in which we use the physical UART TX, and in part 2 we'll try and use Softserial on a non-UART pin to accomplish the same thing.
I couldn't find a decent description of inverted/non-inverted anywhere, so I think what I'm saying is correct in a broad sense, but as I said - please feel to correct me if there's some glaring errors.
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Aside from Part 2, I'll be back doing some more on the R9 as well and seeing if it's improved since I last took a look at it.
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