Add support for ESP32-C3

[tjfsteele]

No description provided.

[tjfsteele]

There is also one change needed to esp async webserver (separate lib) due to a compile error with ambigious overload:

return IPAddress(0U); -> return IPAddress((uint32_t)0);

[DaveDavenport]

relevant issue: me-no-dev/ESPAsyncWebServer#1164

[cpainchaud]

Can you please also make the change for the IPAddress(0U) code? and test it will still compile with other targets?
Then I will merge your request happily!

[cpainchaud]

You will also need to enable builds in .travis.platform.ini and add steps in the GitHub Actions (.github/workflows) so they get built automatically

[tjfsteele]

Can you please also make the change for the IPAddress(0U) code? and test it will still compile with other targets? Then I will merge your request happily!

The other change is in a different Git repository, it's already been requested.

[tjfsteele]

If you can send me your postal address we would like to send you a pcb for RFlink32

[cpainchaud]

@tjfsteele me?

[tjfsteele]

@tjfsteele me?

@cpainchaud Yes :)

[tjfsteele]

@cpainchaud My email address is nodo@tjfs.com