The NodeMcu is an open-source firmware and development kit that helps you to Prototype your IOT product within a few Lua script lines.

•     Open-source
•     Interactive
•     Programmable
•     Low cost
•     Simple
•     Smart
•     WI-FI enabled

Features

Arduino-like hardware IO
Advanced API for hardware IO, which can dramatically reduce the redundant work for configuring and manipulating hardware.
Code like arduino, but interactively in Lua script.
 
Nodejs style network API
Event-driven API for network applicaitons, which faciliates developers writing code running on a 5mm*5mm sized MCU in Nodejs style.
Greatly speed up your IOT application developing process.

Specifications

The Development Kit based on ESP8266, integates GPIO, PWM, IIC, 1-Wire and ADC all in one board. Power your developement in the fastest way combinating with NodeMCU Firmware!

•     USB-TTL included, plug&play
•     10 GPIO, every GPIO can be PWM, I2C, 1-wire
•     FCC CERTIFIED WI-FI module（Coming soon）
•     PCB antenna

Details Info & Documents

https://github.com/nodemcu