changed the pin naming for their LUA firmware. If you are programming a NodeMCU module
you can use the printed D# names. If you use a generic ESP8266 module then you have to
use the corresponding GPIO numbers. Here is a table of the mapping:
The NodeMCU Index is the name on the board, whereas the ESP8266 Internal column is the
one you use in the Arduino IDE code: e.g. D5 on the board is pin GPIO14 in C/C++.