Add native support for ESP32 ESP IDF with example.

[dzungpv]

Add native support for ESP IDF with example. Support all ESP32 family chip support by the IDF.

[dzungpv]

You will see many commit but the change with the last commit is minimal, because I use my own branch and merge with current master, most of the change is add directive to not using Arduino code with ESP IDF build.

[Noschvie]

@dzungpv Would it be possible to easily integrate this stack into the Tasmota ecosystem? What do you think?
Thanks!

[dzungpv]

@dzungpv Would it be possible to easily integrate this stack into the Tasmota ecosystem? What do you think? Thanks!

It is simple, you just ask the one maintenance the Tasmota project. Tasmota using native ESP8266/ESP32 c/c++ driver.

[Noschvie]

@dzungpv Sorry if this is a stupid question: I'd like to establish a "KNXnet/IP tunneling" connection from an ESP32 to a KNX IP interface and specify a group address. So, KNX telegrams should be sent via an tunnel rather than multicast. Is that somewhat understandable?

[thelsing]

Merged. Thanks for your contribution.