rtlips-server

Real-Time Location & Indoor Positioning System server. Combines the following:

• real-time contextual events from Pareto or hlc-server (RTLS)
• real-time BLE (beacon) site surveys from mobile devices (IPS)
• simple positioning algorithms

The real-time location/positioning data stream can be consumed using websockets.

Installation

npm install rtlips-server

Hello rtlips-server

const rtlipsServer = require('rtlips-server');
 
const options = { /* See options */ };
 
var app = new rtlipsServer(options);
 
// Connect to Pareto websocket (requires token)
app.connect('https://pareto.reelyactive.com',
            { query: { token: 'paste from Pareto' } });
 
// Connect to a local hlc-server instance
app.connect('http://localhost:3001');

Then connect a websocket client to http://localhost:3007 and listen for 'appearance', 'displacement', 'keep-alive' and 'disappearance' events. See our Build web apps with beaver.js tutorial for everything you need to quickly get up and running.

Receiving mobile site surveys

POST mobile site surveys to the /events route (ex: http://localhost:3007/events). The mobile site survey must have, at a minimum, the following properties:

{
  "event": "keep-alive",
  "time": 1420075425678,
  "deviceAssociationIds": [ "/* BLE UUID */" ],
  "rssiSignature": {
    "beacon_id_0": rssi_0,
    "beacon_id_1": rssi_1, ...
  }
}

where the beacon_id values are the identifiers of the detected beacons given as lowercase hexadecimal strings without separators (ex: "7265656c79416374697665205555494400000000", which is a concatenated iBeacon UUID, Major, Minor), and the rssi values are numbers.

If the mobile device advertises a Bluetooth Low Energy UUID, be sure to include this in the deviceAssociationIds array, else provide an empty array.

Options

The following options are accepted at run-time.

references

Add a references property to the options to specify all the reference devices (with known positions). For example:

references: {
  "001bc50940810000": { position: [ 0, 0 ] },
  "001bc50940810001": { position: [ 10, 10 ] }
}

pullFactor

Add a pullFactor property to the options to adjust the pull factor in the anchor-and-pull positioning method. The default value is 2. Values should be 1 or greater.

pullFactor: 2

License

MIT License

Copyright (c) 2017 reelyActive

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.