WI-FI NodeM ESP8266+extra memory, module is based on widely explored esp8266 System on Chip from Expressif. an extra memory size to 32Mb (Megabit) was added. This is better, for make a big project with a big library. You do not need to worry about the size of your memory.

Features:

• Event-driven API for network applications
• Onboard have USB-TTL serial converter CH340G, with Micro-USB socket.
  PowerIn for DC 4~9V, to pin VIN.
  
• It combined features of the WI-FI access point and station + microcontroller and uses a simple LUA-based programming language. Arduino-like hardware I/O. And can programming in Arduino IDE
  
• 10 GPIO's D0-D10, PWM functionality, IIC, and SPI communication, 1-Wire and ADC A0, etc. all in one board
• Wi-Fi networking (can be used as an access point and/or station, host a web-server), connect to the internet to fetch or upload data.
• For development can use install on the breadboard.
• Pin headers 2.54mm (0.1") 15 pins x 2 lines inset. Don't solder.
  

Specifications