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Arduino core for ESP8266 WiFi chip

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.

Installing with Boards Manager

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 1.6.5 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).

Available versions

Stable version

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

Documentation: Reference

Staging version

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

Documentation: Reference

Building latest version from source Linux build status

$ git clone https://github.com/esp8266/Arduino.git
$ cd Arduino/build
$ ant dist

Documentation for latest development version:

Issues and support

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

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).

Contributing

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

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.

License and credits

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.