Is there any difference, electrically, between the “in” and “out” ports on a nodeLynk device? I was surprised to see them marked in this way, as I²C is a bus architecture, and the SCL and SDA signals should be identical on an entire bus.
My assumption is that “in” and “out” are so marked solely to ensure that cabling is done correctly, but that the ports are directly connected to one another.
Physical limitations of a prototype are such that it’s substantially easier for me to connect to the “out” ports, and I expect that as long as I take care to connect the signals properly, this won’t be a problem. But if nodeLynk is doing anything sneaky that would keep this from working, it’d be nice to know.