Cloudant Chrome OpenXC CAN

Using HTML5 and Chrome to read directly from USB or Bluetooth

Traffic trace simulator using WebWorkers

This application demonstrates how to develop a HTML5 Chrome app to access USB and Bluetooth OpenXC Vehicle Interface devices.

The application uses PouchDB and Cloudant to synch the captured vehicle data even when the application is offline. If the vehicle slows and connectivity is available these metrics are synchronized with the server to enable crowd source traffic information for all streets. When WIFI is available then all the captured events for the whole journey can be synchronized with Cloudant for post-analysis.

The app queries the server at intervals for traffic information near to the car by using a geospatial radius search.

Why a Chrome App?

Chrome Apps

• Bluetooth / USB Connectivity
• Runs on Windows, Mac, Linux, Android and iOS
  • Current API support
• App runs in the background even when page is closed
• Offline / Online usage

Chrome Apps are HTML5 applications that expose some of the native APIs in Chrome.

Features

v1.0 March 2014

• Traffic Simulator
  • Uses a WebWorker as a background thread and runs OpenXC trace files
• Screen can be locked to disable visual cues
• Text to Speech used for voice cues of traffic congestion
• Translated the NYC Downtown trace to be over London.

Installation

Application can be installed from the Chrome WebStore. Click link to install.

Configuration

Configuration is in the app manifest.json and in src/config.js file.

Running

Download the entire git repository here to access the demo trace file data/london.json as github doesn't support single download of ~60mb JSON files.

Select this trace file as input.

Issues

Find a bug or want to request a new feature? Please let us know by submitting an issue.

Contributing

Cloudant welcomes contributions from anyone and everyone.

Credit

Licensing

Copyright 2014 Cloudant

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

A copy of the license is available in the repository's license file.