2014-02-17 18:05:39 +01:00
<script type="text/javascript">
// users timezone offset
var myOffset = new Date().getTimezoneOffset();
// converts date format from JSON
function getChartDate(d) {
// get the data using javascript's date object (year, month, day, hour, minute, second)
// months in javascript start at 0, so remember to subtract 1 when specifying the month
// offset in minutes is converted to milliseconds and subtracted so that chart's x-axis is correct
return Date.UTC(d.substring(0,4), d.substring(5,7)-1, d.substring(8,10), d.substring(11,13), d.substring(14,16), d.substring(17,19)) - (myOffset * 60000);
}
$(document).ready(function() {
// blank array for holding chart data
var chartData = [];
// variable for the date string
var d;
// variable for the data point
var p;
// variable for the local date in milliseconds
var localDate;
// get the data with a webservice call
$.getJSON('https://api.thingspeak.com/channels/9/field/1.json?callback=?&results=15&offset=0', function(data) {
// if no access
if (data == '-1') {
$('#chart-container').append('This channel is not public. To embed charts, the channel must be public or a read key must be specified.');
}
// iterate through each feed
$.each(data.feeds, function() {
p = this.field1;
// if a numerical value exists add it
if (!isNaN(parseInt(p))) {
chartData.push([getChartDate(this.created_at), parseFloat(p)]);
}
});
// specify the chart options
var chartOptions = {
chart: {
renderTo: 'chart-container',
defaultSeriesType: 'line',
backgroundColor: '#fff',
events: {
load: function() {
// push data every 15 seconds
setInterval(function() {
// get the data with a webservice call
$.getJSON('https://api.thingspeak.com/channels/9/feed/last.json?callback=?&offset=0', function(data) {
p = data.field1;
d = getChartDate(data.created_at);
last_date = dynamicChart.series[0].data[dynamicChart.series[0].data.length-1].x;
// if a numerical value exists and it is a new date, add it
if (!isNaN(parseInt(p)) && (d != last_date)) {
dynamicChart.series[0].addPoint([d, parseFloat(p)], true, true);
}
});
}, 15000);
}
}
},
title: {
text: ''
},
plotOptions: {
line: {
color: '#d62020'
},
bar: {
color: '#d62020'
},
column: {
color: '#d62020'
},
series: {
marker: {
radius: 3
},
animation: true
}
},
tooltip: {
// reformat the tooltips so that local times are displayed
formatter: function() {
var d = new Date(this.x + (myOffset*60000));
return this.series.name + ':<b>' + this.y + '</b><br/>' + d.toDateString() + '<br/>' + d.toTimeString().replace(/\(.*\)/, "");
}
},
xAxis: {
type: 'datetime',
title: {
text: ''
}
},
yAxis: {
title: {
text: ''
}
},
exporting: {
enabled: false
},
legend: {
enabled: false
},
series: [{
name: data.channel.field1
}]
};
// add the data to the chart
chartOptions.series[0].data = chartData;
// set chart labels here so that decoding occurs properly
chartOptions.title.text = 'Dynamic Light Levels';
chartOptions.xAxis.title.text = 'Time';
chartOptions.yAxis.title.text = data.channel.field1;
// draw the chart
var dynamicChart = new Highcharts.Chart(chartOptions);
});
});
</script>
<div class="row">
<div class="text-center">
<%= image_tag 'front.png', :size => '854x144' %>
</div>
</div>
<br><br><br>
<div class="row">
<div class="col-sm-6">
<div id="chart-container" class="center-block" style="width: 500px; height: 260px; padding-left: 20px;"></div>
</div>
<div class="col-sm-6">
<div style="margin-top: 55px;" class="text-center"><a href="http://community.thingspeak.com/tutorials/netduino/create-your-own-web-of-things-using-the-netduino-plus-and-thingspeak/"><%= image_tag 'my_house_status_update.png' %></a></div>
</div>
</div>
<br><br><br>
<div class="row">
<div class="col-sm-4">
<h4 class="breadcrumb">Features</h4>
<p>
<ul>
<li>Open Source API</li>
<li>Real-time data collection</li>
<li>Data processing</li>
<li>Data visualizations</li>
<li>Location-awareness</li>
<li>Status context</li>
<li>Application infrastructure</li>
<li>Twitter proxy</li>
<li>Apps</li>
<li>Plugins</li>
<li><%= link_to '... more', features_pages_path %></li>
</ul>
</p>
</div>
<div class="col-sm-4">
<h4 class="breadcrumb">Applications</h4>
<p>
<ul>
<li>Sensor monitoring</li>
<li>Energy monitoring</li>
<li>Connecting devices and systems</li>
<li>Geo location tracking</li>
<li>Interfacing with social networks</li>
<li>RFID transactions</li>
</ul>
</p>
<h4 class="breadcrumb">Who Uses ThingSpeak</h4>
<p>
<ul>
<li>Application developers</li>
<li>Product integrators</li>
<li>Web designers</li>
</ul>
</p>
</div>
<div class="col-sm-4">
<h4 class="breadcrumb">Get Started</h4>
<div class="col-pad">
If you are ready to get started, <span id="feature_signup"> <%= link_to t(:signup), new_account_path %></span> for a free user account.
</div>
<h4 class="breadcrumb">Connect</h4>
<p>
<ul>
<li><a href="http://www.twitter.com/thingspeak" title="Follow ThingSpeak on Twitter">Twitter</a></li>
<li><a href="https://github.com/iobridge/ThingSpeak" title="Open Source Internet of Things Project on GitHub">GitHub</a></li>
<li><a href="http://community.thingspeak.com" title="Join the ThingSpeak Community">ThingSpeak Community</a></li>
<li><a href="http://community.thingspeak.com/documentation" title="ThingSpeak API and Apps Documentation">Documentation</a> and <a href="http://community.thingspeak.com/tutorials" title="ThingSpeak Tutorials">Tutorials</a></li>
<li><a href="mailto:support@thingspeak.com" title="Contact ThingSpeak">Questions</a></li>
</ul>
</p>
</div>
</div>
<br><br><br>
<div class="row">
<div class="col-sm-offset-2 col-sm-8 col-xs-12">
<div class="center-block" style="max-width: 600px;">
<h4><a href="http://community.thingspeak.com/" title="ThingSpeak Community, Blog, and Forum">latest news<a> <a href="http://feeds.feedburner.com/internetofthings/" title="ThingSpeak RSS Feed"><%= image_tag 'icon_rss.gif' %></a></h4>
<br>
<% cache("blog-posts-on-homepage", :expires_in => 10.minutes) do %>
<%= raw blog_entries %>
<% end %>
</div>
</div>
</div>
