I am working on a project where I am going to use a Hyperpixel 4.0 square touch and hopefully an ePaper screen, both connected to a single Raspberry pi 3b. The Hyperpixel 4 square works great, but my problem is that, as far as I understand it, the Hyperpixel uses all of the GPIO. Most ePaper displays I have seen are either HATs or serial that are meant to be connected to the GPIO, which is a problem. I guess maybe serial to USB might be an option, but I don’t know and thats why I am asking you guys.
Anyone know a solution that might work? I should say that space is an issue, so I would prefer something compact.