This open source hardware variant is intended for development. It has an ESP-12S to provide with more pins available for makers but is to be treated as if the module is an ESP-12E. See my post on the ESP-12E for all the information.
Additional Information
- GitHub repo: nodemcu/nodemcu-devkit-v1.0
- LUA Documentation – This is for the NodeMCU device and many libraries of components it supports now.