This project brings support for ESP8266 chip to the Arduino environment. It lets you write sketches using familiar Arduino functions and libraries, and run them directly on ESP8266, no external microcontroller required.

ESP8266 Arduino core comes with libraries to communicate over WiFi using TCP and UDP, set up HTTP, mDNS, SSDP, and DNS servers, do OTA updates, use a file system in flash memory, work with SD cards, servos, SPI and I2C peripherals.

A large community is well established for questions and answers about Arduino for ESP8266 ESP8266 Community Forum

• Installing options:
  • Using Boards Manager
  • Using git version
  • Using PlatformIO
  • Building with make
• Documentation
• Issues and support
• Contributing
• License and credits

Starting with 1.6.4, Arduino allows installation of third-party platform packages using Boards Manager. We have packages available for Windows, Mac OS, and Linux (32 and 64 bit).

• Install Arduino 1.6.8 from the Arduino website.
• Start Arduino and open Preferences window.
• Enter http://arduino.esp8266.com/stable/package_esp8266com_index.json into Additional Board Manager URLs field. You can add multiple URLs, separating them with commas.
• Open Boards Manager from Tools > Board menu and install esp8266 platform (and don't forget to select your ESP8266 board from Tools > Board menu after installation).

The best place to ask questions related to this core is ESP8266 community forum: http://www.esp8266.com/arduino. If you find this forum or the ESP8266 Boards Manager package useful, please consider supporting it with a donation.

Boards manager link: http://arduino.esp8266.com/stable/package_esp8266com_index.json

Documentation: http://esp8266.github.io/Arduino/versions/2.3.0/

Boards manager link: http://arduino.esp8266.com/staging/package_esp8266com_index.json

Documentation: http://esp8266.github.io/Arduino/versions/2.3.0-rc2/

• Install Arduino 1.6.8
• Go to Arduino directory
• Clone this repository into hardware/esp8266com/esp8266 directory (or clone it elsewhere and create a symlink)

cd hardware
mkdir esp8266com
cd esp8266com
git clone https://github.com/esp8266/Arduino.git esp8266

• Download binary tools (you need Python 2.7)

cd esp8266/tools
python get.py

• Restart Arduino

PlatformIO is an open source ecosystem for IoT development with cross platform build system, library manager and full support for Espressif (ESP8266) development. It works on the popular host OS: macOS, Windows, Linux 32/64, Linux ARM (like Raspberry Pi, BeagleBone, CubieBoard).

• What is PlatformIO?
• PlatformIO IDE
• Quick Start with PlatformIO IDE or PlatformIO Core
• Advanced using - custom settings, uploading to SPIFFS, Over-the-Air (OTA) or using stage version
• Integration with Cloud and Standalone IDEs - Cloud9, Codeanywhere, Eclipse Che (Codenvy), Atom, CLion, Eclipse, Emacs, NetBeans, Qt Creator, Sublime Text, VIM and Visual Studio
• Project Examples

makeEspArduino is a generic makefile for any ESP8266 Arduino project. Using make instead of the Arduino IDE makes it easier to do automated and production builds.

Documentation for latest development version:

• Reference
• Libraries
• File system
• OTA update
• Supported boards
• FAQ / Trubleshooting
• Change log

If you encounter an issue, you are welcome to submit it here on Github: https://github.com/esp8266/Arduino/issues. Please provide as much context as possible: version which you are using (you can check it in Boards Manager), your sketch code, serial output, board model, IDE settings (board selection, flash size, etc).

If you can not find the answers above, you can also try ESP8266 Community Forum

For minor fixes of code and documentation, go ahead and submit a pull request.

Check out the list of issues which are easy to fix — easy issues for 2.2.0. Working on them is a great way to move the project forward.

Larger changes (rewriting parts of existing code from scratch, adding new functions to the core, adding new libraries) should generally be discussed in the chat first.

Feature branches with lots of small commits (especially titled "oops", "fix typo", "forgot to add file", etc.) should be squashed before opening a pull request. At the same time, please refrain from putting multiple unrelated changes into a single pull request.

Arduino IDE is developed and maintained by the Arduino team. The IDE is licensed under GPL.

ESP8266 core includes an xtensa gcc toolchain, which is also under GPL.

Esptool written by Christian Klippel is licensed under GPLv2, currently maintained by Ivan Grokhotkov: https://github.com/igrr/esptool-ck.

Espressif SDK included in this build is under Espressif MIT License.

ESP8266 core files are licensed under LGPL.

SPI Flash File System (SPIFFS) written by Peter Andersson is used in this project. It is distributed under MIT license.

umm_malloc memory management library written by Ralph Hempel is used in this project. It is distributed under MIT license.