What started out as a project to modify Dave Bodnar's original Nextion Throttle while trying to learn "C" and a bit of "C++" has turned out to be a Controller for both DCC++ and DCC-EX Command ...
The WPSD Nextion repo is a set of Nextion HMI (source) and TFT (compiled) files for use with various TFT screens made by Nextion for WPSD-based hotspots and repeaters.