forked from FOSS/BangleApps
115 lines
3.4 KiB
JavaScript
115 lines
3.4 KiB
JavaScript
let isMeasuring = false;
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let currentHeartRate = null;
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let lcdTimeout;
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let logData = [];
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function startMeasure() {
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isMeasuring = true;
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Bangle.setLCDTimeout(0);
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lcdTimeout = setTimeout(() => {
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Bangle.setLCDTimeout(50);
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}, 50000);
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setTimeout(() => {
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Bangle.setHRMPower(1);
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Bangle.on('HRM', handleHeartRate);
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Bangle.beep(400, 1000); // Buzz to indicate measurement start
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drawScreen();
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}, 500);
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}
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function stopMeasure() {
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isMeasuring = false;
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clearTimeout(lcdTimeout);
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Bangle.setLCDTimeout(10);
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Bangle.setHRMPower(0);
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Bangle.removeAllListeners('HRM');
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saveDataToCSV(); // Save data to CSV when measurement stops
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Bangle.beep(400, 800); // Buzz to indicate measurement stop
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drawScreen();
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}
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function handleHeartRate(hrm) {
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if (hrm.confidence > 90) {
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currentHeartRate = hrm.bpm;
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let date = new Date();
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let dateStr = require("locale").date(date);
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let timeStr = require("locale").time(date, 1);
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let seconds = date.getSeconds();
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let timestamp = `${dateStr} ${timeStr}:${seconds}`; // Concatenate date, time, and seconds
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logData.push({ timestamp: timestamp, heartRate: currentHeartRate });
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drawScreen();
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}
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}
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function drawScreen(message) {
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g.clear(); // Clear the display
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// Set the background color
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g.setColor('#95E7FF');
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// Fill the entire display with the background color
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g.fillRect(0, 0, g.getWidth(), g.getHeight());
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// Set font and alignment for drawing text
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g.setFontAlign(0, 0);
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g.setFont('Vector', 15);
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// Draw the title
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g.setColor('#000000'); // Set text color to black
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g.drawString('Heart Rate Monitor', g.getWidth() / 2, 10);
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if (isMeasuring) {
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// Draw measuring status
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g.setFont('6x8', 2);
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g.drawString('Measuring...', g.getWidth() / 2, g.getHeight() / 2 - 10);
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// Draw current heart rate if available
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g.setFont('6x8', 4);
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if (currentHeartRate !== null) {
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g.drawString(currentHeartRate.toString(), g.getWidth() / 2, g.getHeight() / 2 + 20);
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g.setFont('6x8', 1.6);
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g.drawString(' BPM', g.getWidth() / 2 + 42, g.getHeight() / 2 + 20);
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}
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// Draw instructions
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g.setFont('6x8', 1.5);
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g.drawString('Press button to stop', g.getWidth() / 2, g.getHeight() / 2 + 42);
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} else {
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// Draw last heart rate
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g.setFont('Vector', 12);
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g.drawString('Last Heart Rate:', g.getWidth() / 2, g.getHeight() / 2 - 20);
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if (currentHeartRate !== null && currentHeartRate > 0) {
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g.setFont('6x8', 4);
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g.drawString(currentHeartRate.toString(), g.getWidth() / 2, g.getHeight() / 2 + 10);
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} else {
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g.setFont('6x8', 2);
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g.drawString('No data', g.getWidth() / 2, g.getHeight() / 2 + 10);
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g.setFont('6x8', 1);
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g.drawString(message || 'Press button to start', g.getWidth() / 2, g.getHeight() / 2 + 30);
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}
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}
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// Update the display
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g.flip();
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}
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function saveDataToCSV() {
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let csvContent = "Timestamp,Heart Rate\n";
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logData.forEach(entry => {
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csvContent += `${entry.timestamp},${entry.heartRate}\n`;
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});
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require("Storage").write("heart_rate_data.csv", csvContent);
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}
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setWatch(function() {
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if (!isMeasuring) {
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startMeasure();
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} else {
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stopMeasure();
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}
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}, BTN1, { repeat: true, edge: 'rising' });
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drawScreen();
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