WebUSB ❤ ️Arduino

This repository contains an Arduino library for WebUSB-enabling your sketches. Example sketches and JavaScript code are available in the demos directory.

Compatible Hardware

WebUSB requires an Arduino model that gives the sketch complete control over the USB hardware. This library has been tested with the following models:

• Arduino Leonardo
• Arduino/Genuino Micro

These boards are both based on the ATmega32U4.

Getting Started

1. Make sure you are running the latest dev-channel release of Google Chrome.

2. Make sure the "Experimental Web Platform Features" flag is enabled in chrome://flags. (Sorry, I can't link to it. You need to enter it manually into the omnibox.)

3. Install at least version 1.6.7 of the Arduino SDK.

4. The WebUSB library provides all the extra low-level USB code necessary for WebUSB support except for one thing: Your device must be upgraded from USB 2.0 to USB 2.1. To do this go into the SDK installation directory and open hardware/arduino/avr/cores/arduino/USBCore.h. Then find the definition of the D_DEVICE macro and change 0x200 to 0x210. That's it!

5. Copy (or symlink) the library/WebUSB directory from this repository into the libraries folder in your sketchbooks directory.

6. Launch the Arduino SDK. You should see "WebUSB" as an option under "Sketch > Include Library".

7. Load up demos/rgb/sketch/sketch.ino and program it to your device.

8. When the sketch is finished uploading you should see a notification from Chrome: "Go to webusb.github.io/arduino/demos/ to connect." Try it out!