Module creation & registration now made a lot simpler. In essence,
each module file is now self-contained and only needs a
NODEMCU_MODULE(MYNAME, "myname", myname_map, luaopen_myname);
line to both be automatically recognised by the Lua initialization
as well as honor the LUA_USE_MODULES_MYNAME #define.
As per #810 & #796, only LUA_OPTIMIZE_MEMORY=2 & MIN_OPT_LEVEL=2 are
supported when building. This commit effects that limitation.
With this change modules/auxmods.h no longer needs to be updated for
every new module, nor do module writers need to cater for a hypothetical
LUA_OPTIMIZE_MEMORY < 2 scenario.
The module will start a SoftAP, DNS, HTTP server acting as a captive portal.
The portal will have the SSID SetupGadget and will serve a website where
credentials for the end users WLAN can be submitted.
Once valid credentials have been submitted and used to connect to the
local WLAN this module will stop.
This module requires USE_DNS to enabled in dhcpserver.h
