Moment Software Development Kit

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This repository contains the Software Development Kit (SDK) for Moment, the wearable device that communicates entirely through your sense of touch.

For more information about Moment, visit

This SDK contains the code that is executed on the Moment devices inside of a custom JavaScript runtime environment. To simplify the process of creating custom embedded software for Moment, we provide several ready-to-use functions for creating event callbacks, transitioning the LED color, and creating rich haptic effects.


The source code for the SDK is hosted on Github and can be found at


You can browse the documentation at

Extending Moment (beginners)

If you just want to create plugins for Moment that extend the functionality of the device, you don't need to modify the SDK code at all. The Moment SDK is built into every Moment device. All you need to do is create a JavaScript source file that makes use of the public API's provided by the SDK.

Step 1: Launch the Moment Simulator

To test your plugins, you can use our web-based simulator before deploying to your Moment device. The simulator allows you to visualize haptic effects and test event handlers you have created for the device.

Step 2: Implement a Plugin

The Moment.extend() function allows you to create a plugin that integrates with Moment and provides additional functionality to the device in a reusable and modular fashion. Below, you can find an example of the implementation:

// structure for implementing a meditation timer plugin
Moment.extend('meditate', {
    init: function () {
        this.interval = Moment.setInterval(5000, function () {
            // create haptic patterns every 5 seconds

    remove: function () {

    // events to attach to the Moment global
    events: {
        'accelerometer': function () {
            var data = Moment.Accelerometer;
            Moment._log(data.x + "," + data.y + "," + data.z);
            // implement some accelerometer logic here e.g. if values exceed threshold
        'timertick': function () {
            var time = Moment.uptime();
            // implement something to change the haptic feedback based on the time

Step 3: Create a Gist on Github

Visit to create a Gist. A Gist will provide you with a version-controlled pastebin for your Moment plugin. Once you create a Gist, copy the URL and paste it into the Moment app as a user script. This will allow you to enable and disable the plugin you've created from the Moment app.

Hacking the SDK (advanced users)

To develop on the Moment SDK, you will need to install some dependencies first. The following instructions assume you have some familiarity with your terminal.

Step 0: Clone Repository

Clone the repository:

git clone

Change the working directory:

cd moment-sdk

Step 1: Install NPM

Follow this Getting Started Guide to install NPM for your operating system.

Step 2: Install Gulp

Our build system uses the Gulp package to manage JavaScript compilation and documentation generation. You will need a global installation of gulp, which you can obtain by entering the following command into your terminal:

npm install -g gulp

Step 4: Ensure Java is Available

Make sure you have the Java runtime (JRE) installed. We use the java command as part of the build process.

Step 5: Install NPM Dependencies

For the rest of our build system, you can install all the necessary software by entering the following command into your terminal:

npm install


All features of the SDK are contained within the Moment namespace. This is a global object that contains submodules of functionality in their own individual namespaces. This is the only global variable exposed by the SDK, and is the only global variable you must avoid reassigning. However, we recommend using a self-invoking function for all of your code to avoid polluting the global namespace.

Typical Development Workflow

Creating and Running Tests

Unit tests are run using Mocha, and all test files are in the test/ folder. Running tests is easy:

npm test

To create new tests, you will do one of the following:

  1. Create a new test module in a separate file
  2. Add a unit test to an existing module

If your changes involve several new classes and functions, you may want to create a new file; however, we prefer adding unit tests to existing test files under most circumstances.

To ensure tests cases provide adequate code coverage, we make use of the istanbul package. To run a coverage test using it, just run the following command:

npm run coverage

Generating Documentation

Documentation is generated using JSDoc, and all additions to the Moment SDK must be documented using inline comments. To generate documentation for your code, simply run the following command:

npm run generate-docs

Compiling with Closure Compiler

The last step before the SDK code can be used on-board Moment is compilation using the Google Closure Compiler. The Closure Compiler is configured to use all of its advanced optimizations, and will also enforce several code style rules to allow for aggressive size reduction and optimization. To compile the JavaScript source for the SDK, run the following command:

npm run compile

Pull Requests and Issues

We invite anyone to open an issue for feature requests, bugs, and questions. Likewise, you are welcome to fork the code as long as you respect the GNU General Public License. If you wish to create a pull request on the main repository, we may require you to sign a contributor's agreement - your code will still be made available under the GPL, but Somatic Labs requires all direct contributions to be licensed back to our company (it makes our lawyers happy).


Copyright (c) 2016 Somatic Labs. All Rights Reserved.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

The information contained herein is property of Somatic Technologies, Inc.