About NodeMCU NodeMCU stands for Node Microcontroller Unit. It is an open-source Lua-based firmware that is designed for IoT(Internet of Things) applications. The module that runs this firmware is ESP-12E and that module is based on 32-bit ESP8266 MCU. It has 2.4 GHz Wi-Fi that supports WPA/WP2. The ESP-12E comes with a programmer and a
