NodeMCU. 30 Pins (ESP8266 WiFi Programming & Development Kit)

Features

• Finally, programable WiFi module.
• Arduino-like (software defined) hardware IO.
• Can be programmed with the simple and powerful Lua programming language or Arduino IDE.
•  USB-TTL included, plug & play.
• 10 GPIOs D0-D10, PWM functionality, IIC and SPI communication, 1-Wire and ADC A0 etc. all in one board.
• Wifi networking (can be used as access point and/or station, host a web server), connect to internet to fetch or upload data.
• Event-driven API for network applications.
• PCB antenna.