adding files to phystrax

apps/phystrax/app-icon.js

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+require("heatshrink").decompress(atob("mEwwZC/AH4ABgVJkmAA4cEyVJCIwIBkmSAwUBAoIIBCAgaCBYNIA4IFCFgwIDF4Q7CBAWQFg4CBkESCIg+DhIRFAQ9ACKYOLMRWf5IRQ/IRP/4RlzwRKyf5k4RC/xcFCISPBKwMn+YRB/4RFUImf/4RCEwIRIa4P/AAPz/YRDHwLXEgP//1P/+T/8vJQIZCCIkAn/yCIOSv8/2YQCCIOQCIY+CCIYmB8g1CCIkECIM8CII4CLIeACIcAMQd//mSvYRDCAkAiQRFWYcgCIsCCJIQFbQl/8jCGAAq2ByVPCIiwCAAq2BCILCECA6SEAQaMEAAqSCRhIAFCIoQKSQiMHQBJ6IQBB6IQBAQNNwRoLAH4AoA="))

apps/phystrax/app.js

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

apps/phystrax/interface.html

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+<html>
+<head>
+  <link rel="stylesheet" href="../../css/spectre.min.css">
+</head>
+<body>
+  <div id="data"></div>
+  <button class="btn btn-default" id="btnSave">Save</button>
+  <button class="btn btn-default" id="btnDelete">Delete</button>
+
+  <script src="../../core/lib/interface.js"></script>
+  <script>
+    var dataElement = document.getElementById("data");
+    var csvData = "";
+
+    function getData() {
+      // Show loading window
+      Util.showModal("Loading...");
+      // Get the data
+      dataElement.innerHTML = "";
+      Util.readStorageFile(`heart_rate_data.csv`, data => {
+        csvData = data.trim();
+        // Remove loading window
+        Util.hideModal();
+        // If no data, report it and exit
+        if (data.length == 0) {
+          dataElement.innerHTML = "<b>No data found</b>";
+          return;
+        }
+        // Otherwise parse the data and output it as a table
+        dataElement.innerHTML = `<table>
+        <tr>
+          <th>Timestamp</th>
+          <th>Heart Rate</th>
+        </tr>` + data.trim().split("\n").map(l => {
+          l = l.split(",");
+          return `<tr>
+          <td>${l[0]}</td>
+          <td>${l[1]}</td>
+          </tr>`
+        }).join("\n") + "</table>";
+      });
+    }
+
+    // Call a utility function to save the data
+    document.getElementById("btnSave").addEventListener("click", function() {
+      Util.saveCSV("heart_rate_data", csvData);
+    });
+
+    // Delete the file
+    document.getElementById("btnDelete").addEventListener("click", function() {
+      Util.showModal("Deleting...");
+      Util.eraseStorageFile("heart_rate_data.csv", function() {
+        Util.hideModal();
+        getData();
+      });
+    });
+
+    // Called when the app starts
+    function onInit() {
+      getData();
+    }
+  </script>
+</body>
+</html>

apps/phystrax/metadata.json

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+{ "id": "phystrax",
+  "name": "PhysTrax",
+  "shortName":"PhysTrax",
+  "icon": "app.png",
+  "version":"0.01",
+  "description": "Tracking physiological measurements to support active learning in classrooms",
+  "tags": "health",
+  "interface": "interface.html",
+  "supports": ["BANGLEJS2"],
+  "storage": [
+    {"name":"phystrax.app.js","url":"app.js"},
+    {"name":"phystrax.img","url":"app-icon.js","evaluate":true}
+  ]
+}