v.2.1.0

This release contains many enhancements.
I would not call this stable, but I may never call my projects "stable". 😉

The most important ne feature is the integration of the Homie framework.
This adds support for wifi #3 , mqtt #7 , OTA-Update #5 .
There are also some new scenes like "ice" #17 and some new flags #10 .
If you do not want to use wifi you can enable the "standalone mode" in your custom_values.h.

You can copy the attached binary to an micro sd card to update the Nextion display.