Because Bart Dring’s tindie store is on vacation for a few weeks, I decided to throw something together to make my own out of perfboard.
Too late tonight to see whether this… work of… art lets the magic smoke out of the ESP32 or actually works:
Hidden underneath the ESP32 is a 4-channel level shifter I can use to drive anything that needs 5V instead of 3.3V, but the boards that Bart made drive the steppers with 3.3V and I hope that’s sufficient for the LV8727 boards I will be using. I used the same ports as his MPCNC v1.2 controller board so that I can use his configuration without having to think too much about it.
I haven’t hooked up any of the inputs yet, but I can test without them, I think, though I might have to rebuild firmware with some of them disabled or just give in and connect some more wires.