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test.html
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<html>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.min.js"></script>
<script type="text/javascript">
$(function(){
$.getJSON("/api/sensorreadings", function(data) {
//$(".text").text(JSON.stringify(data));
drawChart(data);
});
});
function convertData(data) {
var chartData = {};
var humidities = [];
var temps = [];
var dataPoints = [];
for(i=0;i<data.length;i++) {
var dateOfReading = new Date(data[i].dateofreading);
console.log(dateOfReading);
dataPoints.push( (dateOfReading.getMonth()+1) + "/" + dateOfReading.getDate() );
temps.push(data[i].temp);
humidities.push(data[i].humidity);
}
chartData.dataPoints = dataPoints;
chartData.temps = temps;
chartData.humidities = humidities;
return chartData;
}
function drawChart(data) {
var chartData = convertData(data);
var data = {
labels: chartData.dataPoints,
datasets: [
{
label: "Temperature",
fillColor: "rgba(220,220,220,0.2)",
strokeColor: "rgba(220,220,220,1)",
pointColor: "rgba(220,220,220,1)",
pointStrokeColor: "#fff",
pointHighlightFill: "#fff",
pointHighlightStroke: "rgba(220,220,220,1)",
data: chartData.temps
},
{
label: "Humidity",
fillColor: "rgba(151,187,205,0.2)",
strokeColor: "rgba(151,187,205,1)",
pointColor: "rgba(151,187,205,1)",
pointStrokeColor: "#fff",
pointHighlightFill: "#fff",
pointHighlightStroke: "rgba(151,187,205,1)",
data: chartData.humidities
}
]
};
var options = {
multiTooltipTemplate: "<%= datasetLabel %> - <%= value %>"
};
// Get context with jQuery - using jQuery's .get() method.
var ctx = $("#myChart").get(0).getContext("2d");
// This will get the first returned node in the jQuery collection.
var myLineChart = new Chart(ctx).Line(data, options);
}
</script>
<body>
<div class="text"></div>
<canvas id="myChart" width="100%" height="400"></canvas>
</body>
</html>