RQteafactory-NodeJS/static/js/sensor-1.js

54 lines
2.0 KiB
JavaScript

document.addEventListener('DOMContentLoaded', function () {
var chartContainer = document.getElementById('chart-container');
var myChart = echarts.init(chartContainer);
var timestamps = [], temperatures = [];
function fetchInitialData() {
fetch('http://111.230.197.156:8000/get_sensor_data')
.then(response => response.json())
.then(data => {
timestamps = data.timestamps.slice(-200); // 只保留最新的200个时间戳
temperatures = data.temperatures.slice(-200); // 只保留最新的200个温度数据
updateChart();
});
}
function fetchLatestData() {
fetch('http://111.230.197.156:8000/get_latest_sensor_data')
.then(response => response.json())
.then(data => {
// 如果已有200个数据则移除最旧的一条
if (timestamps.length >= 200) {
timestamps.shift();
temperatures.shift();
}
// 添加新的数据
timestamps.push(data.timestamps);
temperatures.push(data.temperature);
updateChart();
});
}
function updateChart() {
var option = {
title: { text: '温度数据', textStyle: { color: 'white' } },
tooltip: { trigger: 'axis' },
legend: { data: ['温度'], textStyle: { color: 'white' } },
xAxis: { type: 'category', data: timestamps, axisLabel: { color: 'white' } },
yAxis: { type: 'value', axisLabel: { color: 'white' } },
series: [{ name: '温度', type: 'line', data: temperatures }]
};
myChart.setOption(option);
document.getElementById('temperature').textContent = `当前温度: ${temperatures[temperatures.length - 1]}`;
}
// 初始化时获取所有数据
fetchInitialData();
// 每5秒获取最新的数据
setInterval(fetchLatestData, 1000);
});