I perform the development against github but keeping private because the code needs major cleanup. I hope to open it in a month or two.
There is a proof of concept that I developed earlier using a Teensy 4 (it’s a beast), a 3.5 Nextion screen and Arduino IDE. https://github.com/zapta/stepper_analyzer.
The new one will be more robust, less expensive, easier to develop, and easier to upgrade and LVGL has a big part in it. 