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Important Notice: This repository contains the legacy Arduino IDE 1.x, which is no longer in active development. For the latest features and updates, please visit theArduino IDE 2.x repository. If you encounter issues related to the newer IDE, please report them there.

Arduino is an open-source physical computing platform based on a simple I/O board and a development environment that implements the Processing/Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing and MaxMSP). The boards can be assembled by hand or purchased preassembled; the open-source IDE can be downloaded for free athttps://arduino.cc.

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• The forums
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• To report abug in the software or to requesta simple enhancement, go toGithub Issues.
• More complex requests and technical discussions should go on theArduino Developers mailing list.
• If you're interested in modifying or extending the Arduino software, we strongly suggest discussing your ideas on theDevelopers mailing listbefore starting to work on them. That way you can coordinate with the Arduino Team and others, giving your work a higher chance of being integrated into the official release.

If you think you found a vulnerability or other security-related bug in this project, please read oursecurity policy and report the bug to our Security Team 🛡️. Thank you!

e-mail contact:security@arduino.cc

Detailed instructions for installation on popular operating systems can be found at:

• Linux (see also theArduino playground)
• macOS
• Windows

This repository contains just the code for the Arduino IDE itself. Originally, it also contained the AVR and SAM Arduino core and libraries (i.e. the code that is compiled as part of a sketch and runs on the actual Arduino device), but those have been moved into their own repositories. They are still automatically downloaded as part of the build process and included in built releases, though.

The repositories for these extra parts can be found here:

• Non-core specific Libraries are listed under:Arduino Libraries (and also a few other places, seebuild/build.xml).
• The AVR core can be found at:ArduinoCore-avr.
• Other cores are not included by default but can be installed through the board manager. Their repositories can also be found underArduino GitHub organization.

Instructions for building the IDE and running unit tests can be found on the wiki:

• Building Arduino
• Testing Arduino

Arduino is an open-source project, supported by many. The Arduino team is composed of Massimo Banzi, David Cuartielles, Tom Igoe, and David A. Mellis.

Arduino usesGNU avr-gcc toolchain,GCC ARM Embedded toolchain,avr-libc,avrdude,bossac,openOCD, and code fromProcessing andWiring.

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