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A chart of atmospheric pressure measured with Bosch BME280 using Milkcocoa and Charts.js
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| <!DOCTYPE html> | |
| <html lang="ja"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.2.1/Chart.js"></script> | |
| <script src="https://cdn.mlkcca.com/v0.6.0/milkcocoa.js"></script> | |
| <title>ESPr-BME280</title> | |
| </head> | |
| <body> | |
| <canvas id="canvas" height="80"></canvas> | |
| <script type="text/javascript"> | |
| var canvas = document.getElementById('canvas').getContext('2d'); | |
| var chart_data = { | |
| labels: [], | |
| datasets: [{ | |
| label: "pressure (hPa)", | |
| backgroundColor: "rgba(50, 50, 100, 0.2)", | |
| borderColor: "rgba(50, 50, 100, 1)", | |
| borderWidth: 1, | |
| pointRadius: 0, | |
| data: [] | |
| }] | |
| }; | |
| var ds = new MilkCocoa('xxxxxxx.mlkcca.com').dataStore('xxxxxxxx'); | |
| ds.stream().size(100).sort('desc').next(function(err, data){ | |
| for(var i=0; i<data.length; i++) { | |
| var dt = new Date(data[i].timestamp).toLocaleString(); | |
| chart_data.labels.push(dt); | |
| chart_data.datasets[0].data.push(data[i].value.Press); | |
| } | |
| new Chart.Line(canvas, {data: chart_data}); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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