http://www.banggood.com/NodeMcu-Lua-WIFI-Development-Board-For-ESP8266-Module-p-976440.html
Now the specs do not mention if the IO Pins are 3.3v or 5v?
I assume they will be 3.3 like the ESP8266 modules? and it looks like the wires to the breadboard pins go straight from the IO pins on the ESP-12 Module.
I just wanted to check, I am at work and do not have the module with me.
Chris