meerstern.github.io/web_serial_TMPHMD_SHT31_with_Graph.html at main · meerstern/meerstern.github.io · GitHub

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<!DOCTYPE html>
<html lang="en">
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.9.1/chart.min.js"></script>
  <head>
    <meta charset="UTF-8" />
    <title>TMP/HMD SENSOR SHT31 with Graph</title>
	<style>
			h1 { font-size:20pt; background-color:#4F4F4F; color:#FFFFFF; font-weight : normal;}
			h2 { font-size:16pt; }
			h3 { font-size:8pt; }
			body { font-size:12pt; color:#444444; }
			footer{ font-size:4pt; }
	</style>
  </head>
  <body>
	<h1><span>温度/湿度センサ SHT31 グラフツール </span></h1>
	<style>
	#tmp_chart {max-width:800px;max-height:300px;}
	#hmd_chart {max-width:800px;max-height:300px;}
	</style>
	<canvas id="tmp_chart"></canvas>
	<br/>
	<canvas id="hmd_chart"></canvas>
	<br/>
	<button id="connect-button" type="button" disabled>接続</button>
	<input id="start-button" type="button" value="開始">
	<button id="save-button" type="button">保存</button>
	<button id="clear-button" type="button">クリア</button>
	<h3>
		<span>
		本ツールは<a href="https://www.switch-science.com/catalog/6214/">USBシリアルI2C変換基板</a>とブラウザでI2Cデバイスのテストをするツールです</span>
	</h3>
	<h3><span>オフラインやローカル環境でも動作可能です</span></h3>
	<h3><span>ブラウザはEdgeもしくはChromeのみ対応しています</span></h3>
	<footer>
	<p>Copyright (c) 2022 Crescent All Rights Reserved.</p>
	</footer>

	<script>
	/*	TMP/HMD SENSOR SHT31 with Graph Tool
	 *	Copyright (c) 2022
	 *  K.Watanabe,Crescent
	 *  Released under the MIT license
	 *  http://opensource.org/licenses/mit-license.php
	 */
	const connectButton = document.getElementById ('connect-button');
	const startButton = document.getElementById ('start-button');
	const saveButton = document.getElementById ('save-button');
	const clearButton = document.getElementById ('clear-button');
	let tChart = document.getElementById('tmp_chart');
	let hChart = document.getElementById('hmd_chart');

	let tdata = {
		labels: [],
			datasets: [{
				label: '温度',
				data: [],
				borderColor: 'rgba(100, 100, 255, 1)'
			}]
	};

	let hdata = {
		labels: [],
			datasets: [{
				label: '湿度',
				data: [],
				borderColor: 'rgba(100, 100, 255, 1)'
			}]
	};

	let toptions = {
		scales: {
			x:{title:{display: true, text: '時刻'}},
			y:{title:{display: true, text: '温度℃'}}
		},
		plugins:{legend:{display: false}}
	};

	let hoptions = {
		scales: {
			x:{title:{display: true, text: '時刻'}},
			y:{title:{display: true, text: '湿度％'}}
		},
		plugins:{legend:{display: false}}
	};

	let tmpChart = new Chart(tChart, {
		type: 'line',
		data: tdata,
		options: toptions
	});

	let hmdChart = new Chart(hChart, {
		type: 'line',
		data: hdata,
		options: hoptions
	});

	let port;
	let keepReading = true;
	let reader;
	let dataIndex = 0;
	let str = "";
	let closed;
	let dataArry = Array(6);
	let chartIndex=0;
	let IsRunning = false;
	let IsDataReady = false;
	let nowTmp = 0.0;
	let nowHmd = 0.0;

	//Wait Function
	function Sleep( milli_second )
	{
		var start = new Date();
		while( new Date() - start < milli_second );
	}

	//Graph Clear
	clearButton.addEventListener('click', (event) =>
	{
		chartIndex=0;
		tdata.labels=[];
		tdata.datasets[0].data=[];
		hdata.labels=[];
		hdata.datasets[0].data=[];
		tmpChart.update();
		hmdChart.update();
	});

	//Save Data
	saveButton.addEventListener('click', (event) =>
	{
		var strCsv = "time,temp,humd,\n";

		for(var i=0; i<chartIndex; i++)
		{
			strCsv = strCsv + tmpChart.data.labels[i] + ","
							+ tmpChart.data.datasets[0].data[i] + ","
							+ hmdChart.data.datasets[0].data[i] + ",\n";
		}

		var doc = document.createElement("a");
		doc.href = 'data:text/csv,' + encodeURIComponent(strCsv);
		doc.download = "SHT31.csv";
		doc.click();
	});

	//Com Open & Recieve Data
	async function getReader()
	{
        port = await navigator.serial.requestPort({});
        await port.open({ baudRate: 9600 });

        //Set Init
		if (port && port.writable)
		{
			const bytes1 = new Uint8Array([0x53, 0x88, 0x02, 0x30, 0xA2, 0x50]);
			const bytes2 = new Uint8Array([0x53, 0x88, 0x02, 0x30, 0x41, 0x50]);
			const bytes3 = new Uint8Array([0x53, 0x88, 0x02, 0x30, 0x66, 0x50]);
			const writer = port.writable.getWriter();
			dataIndex=0;
			writer.write(bytes1);
			Sleep(30);
			writer.write(bytes2);
			Sleep(30);
			writer.write(bytes3);
			writer.releaseLock();
		}

		connectButton.innerText = '切断';
		startButton.disabled = false;


		//Start Stop Control
		startButton.addEventListener('click', (event) =>
		{
			IsRunning=IsRunning?false:true;
			startButton.value=IsRunning?"停止":"開始";
		});


		//Interval Timer 2000msec=2sec
		setInterval(function()
		{
			//console.log("Interval");
			if(IsDataReady==false)
				getTmpHmdData();
			if(IsRunning && IsDataReady)
			{
				const dt = new Date();
				const d = new Intl.DateTimeFormat("ja-jp", {
				  hour: "2-digit",
				  minute: "2-digit",
				  second: "2-digit",
				}).format(dt);
				tmpChart.data.datasets[0].data[chartIndex] = nowTmp;
				hmdChart.data.datasets[0].data[chartIndex] = nowHmd;
				tmpChart.data.labels[chartIndex] = d;
				hmdChart.data.labels[chartIndex] = d;
				tmpChart.update();
				hmdChart.update();
				chartIndex=chartIndex+1;
				IsDataReady=false;
			}
		},2000);


		//Get TEMP & HUMD
		function getTmpHmdData()
		{
          if (port && port.writable)
		  {
            const bytes1 = new Uint8Array([0x53, 0x88, 0x02, 0x24, 0x00, 0x50]);
			const bytes2 = new Uint8Array([0x53, 0x89, 0x06, 0x50]);
            const writer = port.writable.getWriter();
			dataIndex=0;
            writer.write(bytes1);
			Sleep(30);
			writer.write(bytes2);
            writer.releaseLock();
			//console.log("Send");
          }
        }


		while (port.readable && keepReading)
		{
			reader = port.readable.getReader();
			try {
				while (true)
				{
					const { value, done } = await reader.read();
					if (done)
					{
						reader.releaseLock();
						break;
					}

					if (value)
					{
						//console.log(value);
						//console.log(dataIndex);
						dataArry[dataIndex] = value;

						if(dataIndex==5)
						{
							var t = -45.0+((dataArry[0]*256.0+dataArry[1]*1.0)*175.0/65535.0);
							var h = 100.0*(dataArry[3]*256+dataArry[4]*1.0)/65535.0;
							nowTmp = Math.round(10*t)/10;
							nowHmd = Math.round(10*h)/10;
							var str=" " + nowTmp + " ℃ " + nowHmd + " ％";
							console.log(str);
							dataIndex=0;
							IsDataReady=true;
						}
						else
						{
							dataIndex = dataIndex+1;
						}
					}
				}
			}
			catch (error)
			{
			}
			finally
			{
				reader.releaseLock();
				await port.close();
			}

		}

      }

	if ('serial' in navigator)
	{
		connectButton.addEventListener('click', async ()=>
		{
			if (port)
			{
				keepReading = false;
				connectButton.innerText = '接続';
				startButton.disabled = true;
				reader.cancel();
				await closed;
				port = undefined;
			}
			else
			{
				closed = getReader();
			}
		});
		connectButton.disabled = false;
	}
	else
	{
		alert('お使いのブラウザは対応していません Edgeもしくはchromeを使用してください');
	}
	</script>
  </body>
</html>