iobroker.echarts

/* Example of server-side chart rendering using sendTo */ // Assuming 'echarts.0.myPreset' is a pre-configured chart preset in the ioBroker.echarts adapter. // You can create presets via the ioBroker admin interface for the echarts adapter. sendTo( 'echarts.0', { preset: 'echarts.0.myPreset', // The ID of your pre-defined chart preset renderer: 'png', // Output format: 'svg', 'png', 'jpg', 'pdf' width: 1024, // Width of the generated image height: 768, // Height of the generated image background: '#FFFFFF', // Background color (e.g., for PNG/JPG) theme: 'light', // Chart theme: 'light' or 'dark' quality: 0.9, // Quality for JPG renderer (0.0 - 1.0) fileName: 'my_chart.png', // Name to save the file in ioBroker DB (e.g., echarts.0/my_chart.png) cache: 300 // Cache time for this preset in seconds }, result => { if (result.error) { console.error('Failed to render chart:', result.error); } else { console.log('Chart rendering successful. Data or file path:', result.data); // result.data could be a base64 URL if fileName is not specified, // or a confirmation if fileName is used to save to ioBroker DB. } } ); // Example of updating a chart with data from a JSON state // This assumes you have a state '0_userdata.0.myCustomChartData' of type 'json' // and your chart preset is configured to use this state as a data source. const customJsonStateId = '0_userdata.0.myCustomChartData'; const chartData = [ { "ts": Date.now() - 3600000, "val": 25 }, { "ts": Date.now() - 1800000, "val": 30 }, { "ts": Date.now(), "val": 28 } ]; // To update the chart, simply update the JSON state. The adapter will react to changes. setState(customJsonStateId, JSON.stringify(chartData), true); console.log(`Updated state '${customJsonStateId}' with new chart data.`);