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@krhoyt /app.js
Last active May 27, 2017

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Particle Location with Google Integration
var cfenv = require( 'cfenv' );
var express = require( 'express' );
var jsonfile = require( 'jsonfile' );
var parser = require( 'body-parser' );
var Particle = require( 'particle-api-js' );
var request = require( 'request' );
// External configuration
config = jsonfile.readFileSync( __dirname + '/config.json' );
// Application
var app = express();
// Middleware
app.use( parser.json() );
app.use( parser.urlencoded( {
extended: false
} ) );
// Per-request actions
app.use( function( req, res, next ) {
// Configuration
req.config = config;
// Just keep swimming
next();
} );
// Static for main files
app.use( '/', express.static( 'public' ) );
// Bluemix
var env = cfenv.getAppEnv();
// Listen
var server = app.listen( env.port, env.bind, function() {
// Debug
console.log( 'Started on: ' + env.port );
} );
// Socket
var io = require( 'socket.io' )( server );
// Paricle
var particle = new Particle();
// Login
particle.login( {
username: config.particle_username,
password: config.particle_password
} ).then(
function( data ) {
// Listen to event stream
// Specific to my devices
// Can use device ID if known
particle.getEventStream( {
auth: data.body.access_token,
deviceId: 'mine',
} ).then( function( stream ) {
// Stream event arrived
stream.on( 'event', function( evt ) {
// Look for location-specific event
if( evt.name.startsWith( 'hook-response/' + config.event_name ) ) {
// Parse out location details
var parts = evt.data.split( ',' );
// Assemble message
var msg = JSON.stringify( {
id: evt.name.split( '/' )[2],
published: evt.published_at,
position: {
lat: parseFloat( parts[0] ),
lng: parseFloat( parts[1] ),
},
accuracy: parseInt( parts[2] )
} );
// Send to clients
io.emit( 'location', msg );
}
} );
} );
},
function( err ) {
console.log( err );
}
);
{
"location_api_key": "AIzaSyBLfo4g4C8Wzo2gqZy6rFkYLORIBAXakPw",
"map_api_key": "AIzaS2AVdZUkJcTZlcBr3xdidBgCBA55q4jjbXg",
"event_name": "deviceLocator",
"particle_username": "_YOUR_PARTICLE_USERNAME_",
"particle_password": "_YOUR_PARTICLE_PASSWORD_",
"particle_device": "240023000f4d343436313031"
}
<html>
<head>
<title>Location</title>
<!-- Styles -->
<!-- Just fill with map -->
<style>
body {
margin: 0;
overflow: hidden;
padding: 0;
}
#map {
height: 100%;
width: 100%;
}
</style>
</head>
<body>
<!-- Map placeholder -->
<div id="map"></div>
<!-- Google Maps -->
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCHSq9HBd3Q-ar2zbCUnB4HwdD64IgNl3M"></script>
<!-- Socket IO -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/1.7.2/socket.io.js"></script>
<!-- Application -->
<script>
class Location {
constructor() {
// Create the map instance
// Set default location
// Set default zoom level
this._map = new google.maps.Map( document.querySelector( '#map' ), {
center: {lat: 41.1106266, lng: -73.7248718},
zoom: 14
} );
// Marker showing location
// Wait for first location event
this._marker = null;
// Socket
// Listen for location events
this._socket = io();
this._socket.on( 'location', evt => this.doLocation( evt ) );
}
// Location event
// Position marker and map
doLocation( evt ) {
// Parse JSON
var data = JSON.parse( evt );
console.log( data );
// First location event
// Instantiate marker
if( this._marker == null ) {
this._marker = new google.maps.Marker( {
map: this._map
} );
}
// Position marker
// Center map
this._marker.setPosition( data.position );
this._map.setCenter( data.position );
}
};
// Here we go!
let app = new Location();
</script>
</body>
</html>
#include <google-maps-device-locator.h>
// Google Maps
GoogleMapsDeviceLocator locator;
// Setup
void setup() {
// Scan for visible networks
// Publish to the cloud every thirty seconds
locator.withSubscribe( locationCallback ).withLocatePeriodic( 30 );
}
void locationCallback( float lat, float lng, float accuracy ) {
// Do stuff if you want
}
// Loop
void loop() {
// Keep on looping
locator.loop();
}
{
"name": "Locator",
"version": "0.1.0",
"description": "Listen for geolocation from Particle Cloud.",
"private": true,
"scripts": {
"start": "node app.js"
},
"dependencies": {
"body-parser": "^1.15.2",
"cfenv": "^1.0.3",
"express": "^4.14.0",
"jsonfile": "^2.4.0",
"particle-api-js": "^6.5.0",
"request": "^2.78.0",
"socket.io": "^1.5.1"
},
"repository": {},
"engines": {
"node": "4.x"
}
}
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