a pi cow with an scs0009 smart servo connected using two 10k resistors
https://cdn.fosstodon.org/media_attachments/files/110/125/660/204/321/307/original/83cb492d7e3630c3.jpeg
I got the little fren to move. And reply to pings and report its position and all that. The examples in the documentation were invaluable, I wouldn't manage to do it with description alone.
For now I'm using a regular uart with two resistors to turn it into a half-duplex uart, and discarding the data I send and read back. I might leave it like that, it works well enough for my needs.
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