Onstep Smart Hand controller add on unit.
I have included a couple of the menu pages for example of its complexity.
Here is some info.
This OnStep add-on is a hand controller with display which can be used to setup and control OnStep. It's an adaptation (and extension in some respects) of Charles Lemaire's excellent "Teen Astro" hand controller firmware that allows it's use with a stock OnStep system. Nearly all features are supported so an SHC+OnStep is a stand-alone telescope controller capable of setup, alignment, and operation (gotos to stars, Messier/Herschel400 objects, the planets, etc.)
This is a wired device that plugs into any OnStep (Alpha branch) controller that has an ST4 port*.
There are currently two versions of the SHC, one based on the Teensy 3.2, and the other on the ESP32.
https://onstep.groups.io/g/main/wiki/7152