NodeMCU V3 IoT WiFi Board (ESP8266)

Description

The NodeMCU LUA IoT WiFi development board is a great starting point for those who are new to developing network-enabled projects. This board features a powerful ESP8266 chip, which is more than enough for pretty much all projects. Furthermore, since the device is programmable using the Arduino IDE, experienced Arduino users who plan to develop IoT-enabled devices have a familiar interface to play with.

Specifications:

• Main module: ESP-12E (ESP8266)
• Flash space: 4MB (32Mbits)
• WiFi 2.4GHz b/g/n; supports WPA/WPA2
• Uses MicroUSB
• The pins are 3.3V, NOT 5V
• The board can be powered with 5V using USB or the VIN pin.
• More info here (how to program) and here (comparison)