@defgroup boards_esp8266_esp-12x ESP-12x based boards
@ingroup boards_esp8266
@brief Support for boards that use ESP-12x modules.
## Overview
This board definition covers not just a single board, but rather a large set of generic boards that either use one of the AI-Tinker ESP-12x AI-Thinker ESP8266 modules or are compatible with them. ESP-12x stands for different versions of the ESP-12 module: ESP-12, ESP-12E, ESP-12E and ESP-12S.
@image html "https://gitlab.com/gschorcht/RIOT.wiki-Images/raw/master/esp8266/ESP-12F_Module.png" "ESP8266 ESP-12F module"<br>
Common examples for this type of boards are the [WEMOS LOLIN D1 mini V2](#wemos_lolin_d1_mini), the [NodeMCU DEVKIT](#nodemcu_devkit_esp8266) and the [Adafruit Feather HUZZAH ESP8266](#adafruit_feather_huzzah_esp8266). All these boards are characterized by using any of the ESP-12x module and breaking out all GPIO pins.
@note This board definition is the most generic one and might also be used for other ESP8266 and ESP8285 boards.
## MCU
Most features of the boards are provided by the ESP8266EX SoC.
@image html "https://gitlab.com/gschorcht/RIOT.wiki-Images/raw/master/esp8266/Wemos_D1_mini_Stack.png?inline=false" "WEMOS LOLIN D1 mini stack example"<br>
There is also a MRF24J40 shield that can be used to extend the board with an IEEE 802.15.4 radio module, the standard networking technology in RIOT.
@image html "https://gitlab.com/gschorcht/RIOT.wiki-Images/raw/master/esp8266/Wemos_MRF24J40_Shield.png?inline=false" "MRF24J40 shield for WEMOS LOLIN D1 mini"<br>
There are several versions of WEMOS LOLIN D1 mini, which only differ in the size of the flash memory and the MCU version used. All versions have a microUSB port with flash / boot / reset logic that makes flashing much easier. Their peripherals are equal and work with the default ESP8266 ESP-12x board definition.
NodeMCU DEVKIT is an open-source hardware project hosted on [GitHub](https://github.com/nodemcu/nodemcu-devkit-v1.0). Therefore, there are a lot of clones available. The board was originally designed for NodeMCU firmware development.
As the other boards described here, NodeMCU ESP12 is generic board that uses ESP-12E module and breaks out all available GPIO pins. It has a Micro-USB port including a flash/boot/reset logic which makes flashing much easier.
Feather is the new series of development boards from Adafruit. [Adafruit Feather HUZZAH ESP8266](https://www.adafruit.com/product/2821) is a ESP8266 based development board with built in WiFi, USB and battery charging. As the other boards described here, Adafruit Feather HUZZAH ESP8266 is a generic board that uses an ESP-12x module and breaks out most of the available GPIO pins. It has one additional LED connected to GPIO0 and a Micro-USB port including a flash/boot/reset logic which makes flashing much easier.
