137 lines
5.1 KiB
Plaintext
137 lines
5.1 KiB
Plaintext
<!DOCTYPE html>
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<html style="height: 100%;">
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<head>
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<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
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<script type="text/javascript" src="//thingspeak.com/highcharts-3.0.8.js"></script>
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<script type="text/javascript" src="//thingspeak.com/exporting.js"></script>
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<script type="text/javascript">
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// variables for the first series
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var series_1_channel_id = 9;
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var series_1_field_number = 1;
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var series_1_read_api_key = '';
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var series_1_results = 10;
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var series_1_color = '#d62020';
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// variables for the second series
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var series_2_channel_id = 9;
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var series_2_field_number = 2;
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var series_2_read_api_key = '';
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var series_2_results = 10;
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var series_2_color = '#00aaff';
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// chart title
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var chart_title = 'Light & Temperature';
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// y axis title
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var y_axis_title = 'Values';
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// user's timezone offset
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var my_offset = new Date().getTimezoneOffset();
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// chart variable
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var my_chart;
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// when the document is ready
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$(document).on('ready', function() {
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// add a blank chart
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addChart();
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// add the first series
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addSeries(series_1_channel_id, series_1_field_number, series_1_read_api_key, series_1_results, series_1_color);
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// add the second series
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addSeries(series_2_channel_id, series_2_field_number, series_2_read_api_key, series_2_results, series_2_color);
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});
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// add the base chart
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function addChart() {
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// variable for the local date in milliseconds
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var localDate;
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// specify the chart options
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var chartOptions = {
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chart: {
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renderTo: 'chart-container',
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defaultSeriesType: 'line',
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backgroundColor: '#ffffff',
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events: { }
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},
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title: { text: chart_title },
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plotOptions: {
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series: {
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marker: { radius: 3 },
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animation: true,
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step: false,
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borderWidth: 0,
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turboThreshold: 0
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}
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},
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tooltip: {
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// reformat the tooltips so that local times are displayed
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formatter: function() {
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var d = new Date(this.x + (my_offset*60000));
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var n = (this.point.name === undefined) ? '' : '<br>' + this.point.name;
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return this.series.name + ':<b>' + this.y + '</b>' + n + '<br>' + d.toDateString() + '<br>' + d.toTimeString().replace(/\(.*\)/, "");
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}
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},
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xAxis: {
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type: 'datetime',
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title: { text: 'Date' }
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},
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yAxis: { title: { text: y_axis_title } },
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exporting: { enabled: false },
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legend: { enabled: false },
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credits: {
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text: 'ThingSpeak.com',
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href: 'https://thingspeak.com/',
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style: { color: '#D62020' }
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}
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};
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// draw the chart
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my_chart = new Highcharts.Chart(chartOptions);
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}
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// add a series to the chart
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function addSeries(channel_id, field_number, api_key, results, color) {
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var field_name = 'field' + field_number;
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// get the data with a webservice call
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$.getJSON('https://api.thingspeak.com/channels/' + channel_id + '/fields/' + field_number + '.json?offset=0&round=2&results=' + results + '&api_key=' + api_key, function(data) {
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// blank array for holding chart data
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var chart_data = [];
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// iterate through each feed
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$.each(data.feeds, function() {
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var point = new Highcharts.Point();
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// set the proper values
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var value = this[field_name];
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point.x = getChartDate(this.created_at);
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point.y = parseFloat(value);
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// add location if possible
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if (this.location) { point.name = this.location; }
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// if a numerical value exists add it
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if (!isNaN(parseInt(value))) { chart_data.push(point); }
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});
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// add the chart data
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my_chart.addSeries({ data: chart_data, name: data.channel[field_name], color: color });
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});
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}
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// converts date format from JSON
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function getChartDate(d) {
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// get the data using javascript's date object (year, month, day, hour, minute, second)
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// months in javascript start at 0, so remember to subtract 1 when specifying the month
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// offset in minutes is converted to milliseconds and subtracted so that chart's x-axis is correct
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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)) - (my_offset * 60000);
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}
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</script>
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</head>
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<body style='background-color: white; height: 100%; margin: 0; padding: 0;'>
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<div id="chart-container" style="width: 800px; height: 400px; display: block; position:absolute; bottom:0; top:0; left:0; right:0; margin: 5px 15px 15px 0; overflow: hidden;">
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<%= image_tag 'ajax-loader.gif', :style => "position: absolute; margin: auto; top: 0; left: 0; right: 0; bottom: 0;" %>
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</div>
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</body>
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</html>
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