Reef Angel Forum

Ah, okay. Well, I might pick up an Arduino and do some testing then.

Thanks for the help, Roberto!

Have you breadboard-ed or otherwise tested multiple PCA9518's with a longer distance on the expansion pin bus?

Hardware. I need to create a hub with more ports, but did not find the time yet. But if you really want to add more, you can also splice 2 usb cables together in parallel. In fact ports 9 and 10 of the hub are like that. It should work. I've never tested, but each port in the hub should be capable ...

If you don't mind me asking, is the limitation software or hardware?

What is the maximum number of expansion hubs that can be connected to one RA+ controller? If applicable, what is the preferred topography with multiple hubs, ie: star, daisy chain?