Adafruit Feather HUZZAH with ESP8266 WiFi is an all in one ESP8266 Wi-Fi development board designed and produced by Adafruit. Feather is a new development board series from Adafruit. As the name suggests, Feather boards are thin and light. Feather is designed to be a new standard for open source development platforms.
Adafruit Feather HUZZAH with ESP8266 WiFi is based on ESP8266 WiFi microcontroller clocked at 80 MHz and at 3.3V logic. ESP8266 has a Tensilica chip core and a full WiFi stack. The microcontroller can be programmed easily by using the Arduino IDE and prepare an easy to run internet of things core. The board has a USB-Serial chip that supports 921600 baud uploading for fast development time.
For easy use in portable projects, Adafruit added a connector suitable for their 3,7V Lithium polymer batteries and built in battery charging. There is no need for a battery because the board can be powered directly from the micro USB connector. If you want to use it with a battery, you are also free to run your project with a battery and then plug in the USB for the battery to be recharged. Feather boards will automatically switch over to USB power when it is available. The battery is also tied through a divider to an analog pin, so it is possible to measure and monitor the battery voltage and detect when it needs a recharge.
The board has a USB interface that allows quick use with Arduino IDE or NodeMCU Lua (comes preprogrammed with the Lua interpreter). The pack also includes some headers for you to solder them and use in your projects or on your breadboard.
Note: USB cable and Li-Po battery are not included.
Adafruit Learn Link: https://learn.adafruit.com/adafruit-feather-huzzah-esp8266
Adafruit Web Page: https://www.adafruit.com/products/2821