From 2f080d5f3a0730f29969ce32be6c06f9370960b4 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 11:21:54 -0400
Subject: [PATCH 01/52] Create app.js for phystrax

---
 apps/phystrax/app.js | 113 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 apps/phystrax/app.js

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
new file mode 100644
index 000000000..4576a9114
--- /dev/null
+++ b/apps/phystrax/app.js
@@ -0,0 +1,113 @@
+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;
+        var date = new Date();
+        var dateStr = require("locale").date(date);
+        var timeStr = require("locale").time(date, 1);
+        var timestamp = dateStr + " " + timeStr; // Concatenate date and time
+        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();

From 53e3fb49825b9f5625b403be94b588013616f5db Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 11:31:10 -0400
Subject: [PATCH 02/52] Create app-icon.js

---
 apps/phystrax/app-icon.js | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 apps/phystrax/app-icon.js

diff --git a/apps/phystrax/app-icon.js b/apps/phystrax/app-icon.js
new file mode 100644
index 000000000..46faf7ecc
--- /dev/null
+++ b/apps/phystrax/app-icon.js
@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mUywZC/AB9JkmQA4mSpMgCAsCCIILBCIoIBoARIEwYRDAQI1FBYdIgESBAoRChIIEAQIsFIIcBCIwCIwEACJ5fCBAkgChRTGMQw4FQApQLBYtAggRJpA+MARZKLRLDdHKBUEZY4CGyEJkEQcwOQX5hKBAQI7BBw9BGoUAEYJKBAoIjHUIUggAmCTAKGDFgQOCAAMCgIgBYQIFBBYawCR4IABGoMCOIOQhEEBYaPDXIhxBiQjCOgQCBHYJTDyA1BwAmCOIwpEBwIsBEwNANARcEEAIFCKYJNBAoLsHRgxHCZAxiFBAb+JAALRFI4puDAARlFUIRuGHA+CCIy/DHAwCHCIgyIQAwADTAYRNTA6SGAAo4ICJCkMAAzdBUhIAGL4tICJSGFCJsAhLIHABQRRQwLaFABbaGAFAA=="))

From 2fef0c63782a35a888e54e964c0b56ab3afbe484 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 11:41:36 -0400
Subject: [PATCH 03/52] Create metadata.json

---
 apps/phystrax/metadata.json | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 apps/phystrax/metadata.json

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
new file mode 100644
index 000000000..589da2e59
--- /dev/null
+++ b/apps/phystrax/metadata.json
@@ -0,0 +1,15 @@
+{ "id": "phystrax",
+  "name": "PhysTrax App",
+  "shortName":"PhysTrax",
+  "version":"0.01",
+  "description": "Tracking physiological measurements to support acticve learning in classrooms",
+  "icon": "app.png",
+  "tags": "",
+  "supports" : ["BANGLEJS2"],  
+  "readme": "README.md",
+  "interface": "interface.html",
+  "storage": [
+    {"name":"heartrate.app.js","url":"app.js"},
+    {"name":"heartrate.img","url":"app-icon.js","evaluate":true}
+  ]
+}

From 19fa4a94b6369de282ed8460488175e9592c4049 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 11:45:34 -0400
Subject: [PATCH 04/52] Create interface.html

---
 apps/phystrax/interface.html | 65 ++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 apps/phystrax/interface.html

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
new file mode 100644
index 000000000..4e048b686
--- /dev/null
+++ b/apps/phystrax/interface.html
@@ -0,0 +1,65 @@
+<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>";
+  });
+}
+
+// You can call a utility function to save the data
+document.getElementById("btnSave").addEventListener("click", function() {
+  Util.saveCSV("heart_rate_data", csvData);
+});
+
+// Or you can also delete the file
+document.getElementById("btnDelete").addEventListener("click", function() {
+  Util.showModal("Deleting...");
+  Util.eraseStorageFile("heart_rate_data.csv", function() {
+    Util.hideModal();
+    getData();
+  });
+});
+
+// Called when app starts
+function onInit() {
+  getData();
+}
+
+    </script>
+  </body>
+</html>

From 16f3ec337fd09ac59d58ec43e6b0d8129fb3000a Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 11:57:00 -0400
Subject: [PATCH 05/52] Update metadata.json

---
 apps/phystrax/metadata.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index 589da2e59..646d51eb8 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -10,6 +10,6 @@
   "interface": "interface.html",
   "storage": [
     {"name":"heartrate.app.js","url":"app.js"},
-    {"name":"heartrate.img","url":"app-icon.js","evaluate":true}
+    {"name":"app.png","url":"app-icon.js","evaluate":true}
   ]
 }

From 331e143e0af4f87ed6fbf1c423bf1559056f5432 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 11:57:17 -0400
Subject: [PATCH 06/52] Update metadata.json

---
 apps/phystrax/metadata.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index 646d51eb8..ee97cb1b0 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -2,7 +2,7 @@
   "name": "PhysTrax App",
   "shortName":"PhysTrax",
   "version":"0.01",
-  "description": "Tracking physiological measurements to support acticve learning in classrooms",
+  "description": "Tracking physiological measurements to support active learning in classrooms",
   "icon": "app.png",
   "tags": "",
   "supports" : ["BANGLEJS2"],  

From 83437f6e3933a0edcd9dac4f5876ffcf145172b4 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 12:01:57 -0400
Subject: [PATCH 07/52] Create README.md

---
 apps/phystrax/README.md | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 apps/phystrax/README.md

diff --git a/apps/phystrax/README.md b/apps/phystrax/README.md
new file mode 100644
index 000000000..ca8df74b7
--- /dev/null
+++ b/apps/phystrax/README.md
@@ -0,0 +1,8 @@
+# CapstoneWearable
+Research has shown that active learning approaches in classrooms, which emphasize the construction of knowledge and reflection on the learning process, significantly enhance the student learning experience and lead to better success in the classroom. The Active Learning Initiative at the University of Georgia focuses on instructor development, student engagement, and classroom enhancement. 
+
+This project focuses specifically on classroom enhancement to create a device that will enhance the learning experience of students in physiology classes by allowing them to learn about and analyze their physiological patterns. The project must adhere to the constraints of a one-hundred dollar per watch budget, the ability to be scaled to a classroom of three-hundred twenty students, and provide data with at least 80% accuracy. By giving students access to their heart rate (HR) and heart rate variability (HRV) data, the goal is that students can better understand the function of the heart as well as the physiological conditions that can be affected by the heart. The original concept was to develop a wrist-wearable, screen-less device featuring sensors that detect a user’s heart rate by emitting LEDs that detect the expansion of blood vessels in the wrist and the quantity of light transmitted in the vascular bed to obtain heart rate and blood oxygen data and the heart rate variability calculated using an algorithm that takes the root-mean-square of interbeat intervals between successive heartbeats. 
+
+After prototyping this custom device and testing its efficacy, the accuracy of the data produced by the sensor was not within the accuracy criteria, and the decision was made to pivot to an existing on-market device coupled with custom software to meet the needs of the client. The analysis software created for the device allows the students to analyze their physiological data and permits for their instructor to access their data anonymously. The data, coupled with survey data entered by the students daily, provides insight into the effect of variables such as sleep, exercise, and caffeine intake to analyze the effects that these have on their physiological measurements. To evaluate the device's efficacy in achieving the goal of 80% accuracy, the wrist wearable device was tested on several different skin tones doing various activities and measuring data over varying intervals and then compared against the data of Apple Watches. 
+
+This project resulted in the creation of a custom data analysis software for the use of students on a Bangle.js smartwatch device that can be continually developed in the future to reach the goal of an inexpensive, easy-to-use device for students to use in active learning classrooms to enhance their understanding of physiology by analyzing their own physiological data in class.

From 2f6a6dc906fcbf953a2e175d47ef97963fad8a59 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 12:05:27 -0400
Subject: [PATCH 08/52] Add files via upload

---
 apps/phystrax/app.png | Bin 0 -> 1299 bytes
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 apps/phystrax/app.png

diff --git a/apps/phystrax/app.png b/apps/phystrax/app.png
new file mode 100644
index 0000000000000000000000000000000000000000..5fd69c6de8f3e7b00e4eb089a4e933d80116a6bf
GIT binary patch
literal 1299
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literal 0
HcmV?d00001


From 698eb47ada2243072b8b3d1f6b2f22697264b0c0 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 12:08:42 -0400
Subject: [PATCH 09/52] Update metadata.json

---
 apps/phystrax/metadata.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index ee97cb1b0..f23405aed 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -4,7 +4,7 @@
   "version":"0.01",
   "description": "Tracking physiological measurements to support active learning in classrooms",
   "icon": "app.png",
-  "tags": "",
+  "tags": "health",
   "supports" : ["BANGLEJS2"],  
   "readme": "README.md",
   "interface": "interface.html",

From 7b9e4b7f29c127bd0504095e173f4c7c54b7a19e Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 12:42:13 -0400
Subject: [PATCH 10/52] Update metadata.json

---
 apps/phystrax/metadata.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index f23405aed..04585e0d1 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -9,7 +9,7 @@
   "readme": "README.md",
   "interface": "interface.html",
   "storage": [
-    {"name":"heartrate.app.js","url":"app.js"},
+    {"name":"phystrax.app.js","url":"app.js"},
     {"name":"app.png","url":"app-icon.js","evaluate":true}
   ]
 }

From 780b95306a92630ee5b24ec07c0b5f4419717e8a Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 3 Apr 2024 12:50:28 -0400
Subject: [PATCH 11/52] Update metadata.json

---
 apps/phystrax/metadata.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index 04585e0d1..a71fc8aa0 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -10,6 +10,6 @@
   "interface": "interface.html",
   "storage": [
     {"name":"phystrax.app.js","url":"app.js"},
-    {"name":"app.png","url":"app-icon.js","evaluate":true}
+    {"name":"app.img","url":"app-icon.js","evaluate":true}
   ]
 }

From 50bdb6fe5557aceb2306fb0ffbaaa132f2a59c5e Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Thu, 4 Apr 2024 14:52:53 -0400
Subject: [PATCH 12/52] Update metadata.json for icon

---
 apps/phystrax/metadata.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index a71fc8aa0..4feeb6f16 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -10,6 +10,6 @@
   "interface": "interface.html",
   "storage": [
     {"name":"phystrax.app.js","url":"app.js"},
-    {"name":"app.img","url":"app-icon.js","evaluate":true}
+    {"name":"app-icon.js","url":"app-icon.js","evaluate":true}
   ]
 }

From d68efc5287748b049b6a2b678c73b7e3a6aa533c Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Thu, 4 Apr 2024 15:29:31 -0400
Subject: [PATCH 14/52] Update app.js

---
 apps/phystrax/app.js | 1 -
 1 file changed, 1 deletion(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 4576a9114..e6566aa26 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -71,7 +71,6 @@ function drawScreen(message) {
             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);

From 409fa3abceb16813adef4980be9e0d4ecdf89245 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Thu, 4 Apr 2024 15:32:44 -0400
Subject: [PATCH 15/52] Update metadata.json

---
 apps/phystrax/metadata.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index 4feeb6f16..d5b204c69 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -3,7 +3,7 @@
   "shortName":"PhysTrax",
   "version":"0.01",
   "description": "Tracking physiological measurements to support active learning in classrooms",
-  "icon": "app.png",
+  "icon": "BangleApps/apps/phystrax/app.png",
   "tags": "health",
   "supports" : ["BANGLEJS2"],  
   "readme": "README.md",

From 7f3fc665581f3d899091427ffc6a524211c39cd3 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Thu, 4 Apr 2024 15:37:21 -0400
Subject: [PATCH 16/52] Update metadata.json

---
 apps/phystrax/metadata.json | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index d5b204c69..6ef02ec1a 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -1,9 +1,10 @@
 { "id": "phystrax",
-  "name": "PhysTrax App",
+  "name": "PhysTrax",
+  "entry": "app.js",
   "shortName":"PhysTrax",
   "version":"0.01",
   "description": "Tracking physiological measurements to support active learning in classrooms",
-  "icon": "BangleApps/apps/phystrax/app.png",
+  "icon": "app.png",
   "tags": "health",
   "supports" : ["BANGLEJS2"],  
   "readme": "README.md",

From 6785717aa8c93e3c74cb8b5907038cfab4b0cd03 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Thu, 4 Apr 2024 15:43:11 -0400
Subject: [PATCH 17/52] Update metadata.json

---
 apps/phystrax/metadata.json | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index 6ef02ec1a..6117b74f6 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -1,6 +1,5 @@
 { "id": "phystrax",
   "name": "PhysTrax",
-  "entry": "app.js",
   "shortName":"PhysTrax",
   "version":"0.01",
   "description": "Tracking physiological measurements to support active learning in classrooms",
@@ -11,6 +10,6 @@
   "interface": "interface.html",
   "storage": [
     {"name":"phystrax.app.js","url":"app.js"},
-    {"name":"app-icon.js","url":"app-icon.js","evaluate":true}
+    {"name":"app-icon.img","url":"app-icon.js","evaluate":true}
   ]
 }

From e411db0eec9f5fc8994ab1028d6dc0ac954ba804 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Thu, 4 Apr 2024 16:25:02 -0400
Subject: [PATCH 18/52] added seconds

---
 apps/phystrax/app.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index e6566aa26..d5c8f4e8c 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -35,13 +35,13 @@ function handleHeartRate(hrm) {
         var date = new Date();
         var dateStr = require("locale").date(date);
         var timeStr = require("locale").time(date, 1);
-        var timestamp = dateStr + " " + timeStr; // Concatenate date and time
+        var seconds = ('0' + date.getSeconds()).slice(-2); // Get seconds and pad with leading zero if necessary
+        var timestamp = dateStr + " " + timeStr + ":" + seconds; // Concatenate date, time, and seconds
         logData.push({ timestamp: timestamp, heartRate: currentHeartRate });
         drawScreen();
     }
 }
 
-
 function drawScreen(message) {
     g.clear(); // Clear the display
 

From b36fba55f11c18c0191c893e162d52bcbcca5e46 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Thu, 4 Apr 2024 17:06:34 -0400
Subject: [PATCH 19/52] Update interface.html

---
 apps/phystrax/interface.html | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index 4e048b686..d1191ef8d 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -41,12 +41,12 @@ function getData() {
   });
 }
 
-// You can call a utility function to save the data
+// Call a utility function to save the data
 document.getElementById("btnSave").addEventListener("click", function() {
   Util.saveCSV("heart_rate_data", csvData);
 });
 
-// Or you can also delete the file
+// Or delete the file
 document.getElementById("btnDelete").addEventListener("click", function() {
   Util.showModal("Deleting...");
   Util.eraseStorageFile("heart_rate_data.csv", function() {

From fdbe704d898cc04a5dd58716ba114762acbfefef Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Thu, 4 Apr 2024 17:12:55 -0400
Subject: [PATCH 20/52] Update interface.html for testing purposes

---
 apps/phystrax/interface.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index d1191ef8d..56f091744 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -23,7 +23,7 @@ function getData() {
     Util.hideModal();
     // If no data, report it and exit
     if (data.length === 0) {
-      dataElement.innerHTML = "<b>No data found</b>";
+      dataElement.innerHTML = "<b>There is no data</b>";
       return;
     }
     // Otherwise parse the data and output it as a table

From b7e40d446fdd01a7d1ce3fe0b6ded4be90146479 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Fri, 5 Apr 2024 22:02:47 -0400
Subject: [PATCH 21/52] testing for app loader integration

---
 apps/phystrax/app.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index d5c8f4e8c..e5a7c9da7 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -62,7 +62,7 @@ function drawScreen(message) {
     if (isMeasuring) {
         // Draw measuring status
         g.setFont('6x8', 2);
-        g.drawString('Measuring...', g.getWidth() / 2, g.getHeight() / 2 - 10);
+        g.drawString('Measuring..', g.getWidth() / 2, g.getHeight() / 2 - 10);
 
         // Draw current heart rate if available
         g.setFont('6x8', 4);

From 6d5bcd72a01530f1d5b465e6d0f2841037183d1d Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Fri, 5 Apr 2024 22:30:36 -0400
Subject: [PATCH 22/52] Delete apps/phystrax directory

---
 apps/phystrax/README.md      |   8 ---
 apps/phystrax/app-icon.js    |   1 -
 apps/phystrax/app.js         | 112 -----------------------------------
 apps/phystrax/app.png        | Bin 1299 -> 0 bytes
 apps/phystrax/interface.html |  65 --------------------
 apps/phystrax/metadata.json  |  15 -----
 6 files changed, 201 deletions(-)
 delete mode 100644 apps/phystrax/README.md
 delete mode 100644 apps/phystrax/app-icon.js
 delete mode 100644 apps/phystrax/app.js
 delete mode 100644 apps/phystrax/app.png
 delete mode 100644 apps/phystrax/interface.html
 delete mode 100644 apps/phystrax/metadata.json

diff --git a/apps/phystrax/README.md b/apps/phystrax/README.md
deleted file mode 100644
index ca8df74b7..000000000
--- a/apps/phystrax/README.md
+++ /dev/null
@@ -1,8 +0,0 @@
-# CapstoneWearable
-Research has shown that active learning approaches in classrooms, which emphasize the construction of knowledge and reflection on the learning process, significantly enhance the student learning experience and lead to better success in the classroom. The Active Learning Initiative at the University of Georgia focuses on instructor development, student engagement, and classroom enhancement. 
-
-This project focuses specifically on classroom enhancement to create a device that will enhance the learning experience of students in physiology classes by allowing them to learn about and analyze their physiological patterns. The project must adhere to the constraints of a one-hundred dollar per watch budget, the ability to be scaled to a classroom of three-hundred twenty students, and provide data with at least 80% accuracy. By giving students access to their heart rate (HR) and heart rate variability (HRV) data, the goal is that students can better understand the function of the heart as well as the physiological conditions that can be affected by the heart. The original concept was to develop a wrist-wearable, screen-less device featuring sensors that detect a user’s heart rate by emitting LEDs that detect the expansion of blood vessels in the wrist and the quantity of light transmitted in the vascular bed to obtain heart rate and blood oxygen data and the heart rate variability calculated using an algorithm that takes the root-mean-square of interbeat intervals between successive heartbeats. 
-
-After prototyping this custom device and testing its efficacy, the accuracy of the data produced by the sensor was not within the accuracy criteria, and the decision was made to pivot to an existing on-market device coupled with custom software to meet the needs of the client. The analysis software created for the device allows the students to analyze their physiological data and permits for their instructor to access their data anonymously. The data, coupled with survey data entered by the students daily, provides insight into the effect of variables such as sleep, exercise, and caffeine intake to analyze the effects that these have on their physiological measurements. To evaluate the device's efficacy in achieving the goal of 80% accuracy, the wrist wearable device was tested on several different skin tones doing various activities and measuring data over varying intervals and then compared against the data of Apple Watches. 
-
-This project resulted in the creation of a custom data analysis software for the use of students on a Bangle.js smartwatch device that can be continually developed in the future to reach the goal of an inexpensive, easy-to-use device for students to use in active learning classrooms to enhance their understanding of physiology by analyzing their own physiological data in class.
diff --git a/apps/phystrax/app-icon.js b/apps/phystrax/app-icon.js
deleted file mode 100644
index 46faf7ecc..000000000
--- a/apps/phystrax/app-icon.js
+++ /dev/null
@@ -1 +0,0 @@
-require("heatshrink").decompress(atob("mUywZC/AB9JkmQA4mSpMgCAsCCIILBCIoIBoARIEwYRDAQI1FBYdIgESBAoRChIIEAQIsFIIcBCIwCIwEACJ5fCBAkgChRTGMQw4FQApQLBYtAggRJpA+MARZKLRLDdHKBUEZY4CGyEJkEQcwOQX5hKBAQI7BBw9BGoUAEYJKBAoIjHUIUggAmCTAKGDFgQOCAAMCgIgBYQIFBBYawCR4IABGoMCOIOQhEEBYaPDXIhxBiQjCOgQCBHYJTDyA1BwAmCOIwpEBwIsBEwNANARcEEAIFCKYJNBAoLsHRgxHCZAxiFBAb+JAALRFI4puDAARlFUIRuGHA+CCIy/DHAwCHCIgyIQAwADTAYRNTA6SGAAo4ICJCkMAAzdBUhIAGL4tICJSGFCJsAhLIHABQRRQwLaFABbaGAFAA=="))
diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
deleted file mode 100644
index e5a7c9da7..000000000
--- a/apps/phystrax/app.js
+++ /dev/null
@@ -1,112 +0,0 @@
-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;
-        var date = new Date();
-        var dateStr = require("locale").date(date);
-        var timeStr = require("locale").time(date, 1);
-        var seconds = ('0' + date.getSeconds()).slice(-2); // Get seconds and pad with leading zero if necessary
-        var 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();
diff --git a/apps/phystrax/app.png b/apps/phystrax/app.png
deleted file mode 100644
index 5fd69c6de8f3e7b00e4eb089a4e933d80116a6bf..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

literal 1299
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diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
deleted file mode 100644
index 56f091744..000000000
--- a/apps/phystrax/interface.html
+++ /dev/null
@@ -1,65 +0,0 @@
-<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>There is no data</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);
-});
-
-// Or delete the file
-document.getElementById("btnDelete").addEventListener("click", function() {
-  Util.showModal("Deleting...");
-  Util.eraseStorageFile("heart_rate_data.csv", function() {
-    Util.hideModal();
-    getData();
-  });
-});
-
-// Called when app starts
-function onInit() {
-  getData();
-}
-
-    </script>
-  </body>
-</html>
diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
deleted file mode 100644
index 6117b74f6..000000000
--- a/apps/phystrax/metadata.json
+++ /dev/null
@@ -1,15 +0,0 @@
-{ "id": "phystrax",
-  "name": "PhysTrax",
-  "shortName":"PhysTrax",
-  "version":"0.01",
-  "description": "Tracking physiological measurements to support active learning in classrooms",
-  "icon": "app.png",
-  "tags": "health",
-  "supports" : ["BANGLEJS2"],  
-  "readme": "README.md",
-  "interface": "interface.html",
-  "storage": [
-    {"name":"phystrax.app.js","url":"app.js"},
-    {"name":"app-icon.img","url":"app-icon.js","evaluate":true}
-  ]
-}

From d49809920a322af8e21638d38380a85e9453b124 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Fri, 5 Apr 2024 22:57:04 -0400
Subject: [PATCH 23/52] adding files to phystrax

---
 apps/phystrax/app-icon.js    |   1 +
 apps/phystrax/app.js         | 114 +++++++++++++++++++++++++++++++++++
 apps/phystrax/app.png        | Bin 0 -> 1950 bytes
 apps/phystrax/interface.html |  64 ++++++++++++++++++++
 apps/phystrax/metadata.json  |  14 +++++
 5 files changed, 193 insertions(+)
 create mode 100644 apps/phystrax/app-icon.js
 create mode 100644 apps/phystrax/app.js
 create mode 100644 apps/phystrax/app.png
 create mode 100644 apps/phystrax/interface.html
 create mode 100644 apps/phystrax/metadata.json

diff --git a/apps/phystrax/app-icon.js b/apps/phystrax/app-icon.js
new file mode 100644
index 000000000..a535bf5e3
--- /dev/null
+++ b/apps/phystrax/app-icon.js
@@ -0,0 +1 @@
+require("heatshrink").decompress(atob("mEwwZC/AH4ABgVJkmAA4cEyVJCIwIBkmSAwUBAoIIBCAgaCBYNIA4IFCFgwIDF4Q7CBAWQFg4CBkESCIg+DhIRFAQ9ACKYOLMRWf5IRQ/IRP/4RlzwRKyf5k4RC/xcFCISPBKwMn+YRB/4RFUImf/4RCEwIRIa4P/AAPz/YRDHwLXEgP//1P/+T/8vJQIZCCIkAn/yCIOSv8/2YQCCIOQCIY+CCIYmB8g1CCIkECIM8CII4CLIeACIcAMQd//mSvYRDCAkAiQRFWYcgCIsCCJIQFbQl/8jCGAAq2ByVPCIiwCAAq2BCILCECA6SEAQaMEAAqSCRhIAFCIoQKSQiMHQBJ6IQBB6IQBAQNNwRoLAH4AoA="))
\ No newline at end of file
diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
new file mode 100644
index 000000000..663652c14
--- /dev/null
+++ b/apps/phystrax/app.js
@@ -0,0 +1,114 @@
+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();
diff --git a/apps/phystrax/app.png b/apps/phystrax/app.png
new file mode 100644
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diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
new file mode 100644
index 000000000..d2d3a89cc
--- /dev/null
+++ b/apps/phystrax/interface.html
@@ -0,0 +1,64 @@
+<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>
diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
new file mode 100644
index 000000000..e4198919b
--- /dev/null
+++ b/apps/phystrax/metadata.json
@@ -0,0 +1,14 @@
+{ "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}
+  ]
+}
\ No newline at end of file

From b9e11d82db012c165c46504980dae5bc3f47446f Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Fri, 5 Apr 2024 22:59:32 -0400
Subject: [PATCH 24/52] adding README

---
 apps/phystrax/README.md | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 apps/phystrax/README.md

diff --git a/apps/phystrax/README.md b/apps/phystrax/README.md
new file mode 100644
index 000000000..484d09036
--- /dev/null
+++ b/apps/phystrax/README.md
@@ -0,0 +1,7 @@
+Research has shown that active learning approaches in classrooms, which emphasize the construction of knowledge and reflection on the learning process, significantly enhance the student learning experience and lead to better success in the classroom. The Active Learning Initiative at the University of Georgia focuses on instructor development, student engagement, and classroom enhancement.
+
+This project focuses specifically on classroom enhancement to create a device that will enhance the learning experience of students in physiology classes by allowing them to learn about and analyze their physiological patterns. The project must adhere to the constraints of a one-hundred dollar per watch budget, the ability to be scaled to a classroom of three-hundred twenty students, and provide data with at least 80% accuracy. By giving students access to their heart rate (HR) and heart rate variability (HRV) data, the goal is that students can better understand the function of the heart as well as the physiological conditions that can be affected by the heart. The original concept was to develop a wrist-wearable, screen-less device featuring sensors that detect a user’s heart rate by emitting LEDs that detect the expansion of blood vessels in the wrist and the quantity of light transmitted in the vascular bed to obtain heart rate and blood oxygen data and the heart rate variability calculated using an algorithm that takes the root-mean-square of interbeat intervals between successive heartbeats.
+
+After prototyping this custom device and testing its efficacy, the accuracy of the data produced by the sensor was not within the accuracy criteria, and the decision was made to pivot to an existing on-market device coupled with custom software to meet the needs of the client. The analysis software created for the device allows the students to analyze their physiological data and permits for their instructor to access their data anonymously. The data, coupled with survey data entered by the students daily, provides insight into the effect of variables such as sleep, exercise, and caffeine intake to analyze the effects that these have on their physiological measurements. To evaluate the device's efficacy in achieving the goal of 80% accuracy, the wrist wearable device was tested on several different skin tones doing various activities and measuring data over varying intervals and then compared against the data of Apple Watches.
+
+This project resulted in the creation of a custom data analysis software for the use of students on a Bangle.js smartwatch device that can be continually developed in the future to reach the goal of an inexpensive, easy-to-use device for students to use in active learning classrooms to enhance their understanding of physiology by analyzing their own physiological data in class.
\ No newline at end of file

From 6ac7ea178916f264b4ad6ec52db38501c23efb9e Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Fri, 5 Apr 2024 23:05:41 -0400
Subject: [PATCH 25/52] added README in metadata

---
 apps/phystrax/README.md     | 1 +
 apps/phystrax/metadata.json | 1 +
 2 files changed, 2 insertions(+)

diff --git a/apps/phystrax/README.md b/apps/phystrax/README.md
index 484d09036..dbb1272ef 100644
--- a/apps/phystrax/README.md
+++ b/apps/phystrax/README.md
@@ -1,3 +1,4 @@
+# Capstone Wearable
 Research has shown that active learning approaches in classrooms, which emphasize the construction of knowledge and reflection on the learning process, significantly enhance the student learning experience and lead to better success in the classroom. The Active Learning Initiative at the University of Georgia focuses on instructor development, student engagement, and classroom enhancement.
 
 This project focuses specifically on classroom enhancement to create a device that will enhance the learning experience of students in physiology classes by allowing them to learn about and analyze their physiological patterns. The project must adhere to the constraints of a one-hundred dollar per watch budget, the ability to be scaled to a classroom of three-hundred twenty students, and provide data with at least 80% accuracy. By giving students access to their heart rate (HR) and heart rate variability (HRV) data, the goal is that students can better understand the function of the heart as well as the physiological conditions that can be affected by the heart. The original concept was to develop a wrist-wearable, screen-less device featuring sensors that detect a user’s heart rate by emitting LEDs that detect the expansion of blood vessels in the wrist and the quantity of light transmitted in the vascular bed to obtain heart rate and blood oxygen data and the heart rate variability calculated using an algorithm that takes the root-mean-square of interbeat intervals between successive heartbeats.
diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index e4198919b..68a2cde56 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -6,6 +6,7 @@
   "description": "Tracking physiological measurements to support active learning in classrooms",
   "tags": "health",
   "interface": "interface.html",
+  "readme": "README.md",
   "supports": ["BANGLEJS2"],
   "storage": [
     {"name":"phystrax.app.js","url":"app.js"},

From 5448b618df4cbd19f2e171710d79ff62b874a905 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Fri, 5 Apr 2024 23:24:47 -0400
Subject: [PATCH 26/52] edited interface.html

---
 apps/phystrax/interface.html | 95 +++++++++++++++---------------------
 1 file changed, 38 insertions(+), 57 deletions(-)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index d2d3a89cc..9d1cad8cd 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -1,64 +1,45 @@
 <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>
+  <head>
+    <link rel="stylesheet" href="../../css/spectre.min.css">
+  </head>
+  <body>
+    <div id="content"></div>
 
-  <script src="../../core/lib/interface.js"></script>
-  <script>
-    var dataElement = document.getElementById("data");
-    var csvData = "";
+    <script src="../../core/lib/interface.js"></script>
+    <script>
+const DB_RECORD_LEN = 2; // Adjust record length for heart rate data
+const DB_HEADER_LEN = 1; // Adjust header length for heart rate data
 
-    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>";
-      });
+var domContent = document.getElementById("content");
+
+function saveCSV(data, title) {
+  var csv = "Timestamp,Heart Rate\n"; // Adjust CSV header for heart rate data
+  var lines = data.split("\n");
+  for (var i = 0; i < lines.length; i++) {
+    var line = lines[i];
+    if (line) {
+      csv += line + "\n";
     }
+  }
+  Util.saveCSV(title, csv);
+}
 
-    // 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();
+function downloadHeartRateData() {
+  Util.showModal("Downloading Heart Rate Data...");
+  Util.readStorageFile("heart_rate_data.csv", data => {
+    Util.hideModal();
+    if (data) {
+      saveCSV(data, "Heart Rate Data"); // Provide a title for the CSV file
+    } else {
+      domContent.innerHTML = "<b>No heart rate data found</b>";
     }
-  </script>
-</body>
+  });
+}
+
+function onInit() {
+  downloadHeartRateData();
+}
+
+    </script>
+  </body>
 </html>

From 426d830fd7c7102e2b54a4daa35b18be16d9f7a1 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Wed, 10 Apr 2024 12:11:13 -0400
Subject: [PATCH 27/52] edited app.js and interface.html

---
 apps/phystrax/app.js         | 2 +-
 apps/phystrax/interface.html | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 663652c14..a085ce152 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -96,7 +96,7 @@ function drawScreen(message) {
 }
 
 function saveDataToCSV() {
-    let csvContent = "Timestamp,Heart Rate\n";
+    let csvContent = "Date,Time,Heart Rate\n";
     logData.forEach(entry => {
         csvContent += `${entry.timestamp},${entry.heartRate}\n`;
     });
diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index 9d1cad8cd..b76d86f74 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -13,7 +13,7 @@ const DB_HEADER_LEN = 1; // Adjust header length for heart rate data
 var domContent = document.getElementById("content");
 
 function saveCSV(data, title) {
-  var csv = "Timestamp,Heart Rate\n"; // Adjust CSV header for heart rate data
+  var csv = "Date,Time,Heart Rate\n";
   var lines = data.split("\n");
   for (var i = 0; i < lines.length; i++) {
     var line = lines[i];
@@ -26,10 +26,10 @@ function saveCSV(data, title) {
 
 function downloadHeartRateData() {
   Util.showModal("Downloading Heart Rate Data...");
-  Util.readStorageFile("heart_rate_data.csv", data => {
+  Util.readStorageFile("heart_rate_data.csv", data => { // Read data from specified file
     Util.hideModal();
     if (data) {
-      saveCSV(data, "Heart Rate Data"); // Provide a title for the CSV file
+      saveCSV(data, "Heart Rate Data"); 
     } else {
       domContent.innerHTML = "<b>No heart rate data found</b>";
     }

From 43d7d9038602810b4951bf01fd830a7431c99977 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <82907149+ekwawu@users.noreply.github.com>
Date: Wed, 10 Apr 2024 12:36:51 -0400
Subject: [PATCH 28/52] Update interface.html (debugging)

---
 apps/phystrax/interface.html | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index b76d86f74..2a60748dc 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -25,12 +25,15 @@ function saveCSV(data, title) {
 }
 
 function downloadHeartRateData() {
+  console.log("starting download...");
   Util.showModal("Downloading Heart Rate Data...");
   Util.readStorageFile("heart_rate_data.csv", data => { // Read data from specified file
+    console.log("Data received: ", data);
     Util.hideModal();
     if (data) {
       saveCSV(data, "Heart Rate Data"); 
     } else {
+      console.log("no data in csv");
       domContent.innerHTML = "<b>No heart rate data found</b>";
     }
   });

From 3fb9e3fd50fabb9fc7c2c0e1ae93e7ecd8451060 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Wed, 10 Apr 2024 15:36:33 -0400
Subject: [PATCH 29/52] changes to app.js + interface.html

---
 apps/phystrax/app.js         |  2 +-
 apps/phystrax/interface.html | 14 ++++++++------
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index a085ce152..663652c14 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -96,7 +96,7 @@ function drawScreen(message) {
 }
 
 function saveDataToCSV() {
-    let csvContent = "Date,Time,Heart Rate\n";
+    let csvContent = "Timestamp,Heart Rate\n";
     logData.forEach(entry => {
         csvContent += `${entry.timestamp},${entry.heartRate}\n`;
     });
diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index 2a60748dc..26e68abd6 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -7,13 +7,13 @@
 
     <script src="../../core/lib/interface.js"></script>
     <script>
-const DB_RECORD_LEN = 2; // Adjust record length for heart rate data
-const DB_HEADER_LEN = 1; // Adjust header length for heart rate data
+const DB_RECORD_LEN = 2; 
+const DB_HEADER_LEN = 1; 
 
 var domContent = document.getElementById("content");
 
 function saveCSV(data, title) {
-  var csv = "Date,Time,Heart Rate\n";
+  var csv = "Timestamp,Heart Rate\n";
   var lines = data.split("\n");
   for (var i = 0; i < lines.length; i++) {
     var line = lines[i];
@@ -28,14 +28,16 @@ function downloadHeartRateData() {
   console.log("starting download...");
   Util.showModal("Downloading Heart Rate Data...");
   Util.readStorageFile("heart_rate_data.csv", data => { // Read data from specified file
-    console.log("Data received: ", data);
     Util.hideModal();
     if (data) {
-      saveCSV(data, "Heart Rate Data"); 
+      saveCSV(data, "Heart Rate Data");
     } else {
-      console.log("no data in csv");
       domContent.innerHTML = "<b>No heart rate data found</b>";
     }
+  }, error => {
+    console.error("Error reading heart rate data:", error);
+    domContent.innerHTML = "<b>Error reading Heart Rate data</b>";
+    Util.hideModal();
   });
 }
 

From fb29c3d378dac2952bf0113d6e266af729ffcd21 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Mon, 15 Apr 2024 23:08:51 -0400
Subject: [PATCH 30/52] edited app.js

---
 apps/phystrax/app.js | 122 +++++++++++++++++++++++++++++++------------
 1 file changed, 90 insertions(+), 32 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 663652c14..ec2409c94 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -1,8 +1,15 @@
-let isMeasuring = false;
-let currentHeartRate = null;
-let lcdTimeout;
-let logData = [];
+var isMeasuring = false;
+var currentHeartRate = null;
+var lcdTimeout;
+var bpmValues = [];
+var logData = [];
+var lastHeartRateLogTimestamp = 0;
 
+// HRV calculation variables
+var hrvSlots = [10, 20, 30, 60, 120, 300];
+var hrvValues = {};
+
+// Heart rate monitor functions
 function startMeasure() {
     isMeasuring = true;
     Bangle.setLCDTimeout(0);
@@ -13,7 +20,7 @@ function startMeasure() {
     setTimeout(() => {
         Bangle.setHRMPower(1);
         Bangle.on('HRM', handleHeartRate);
-        Bangle.beep(400, 1000); // Buzz to indicate measurement start
+        Bangle.buzz(500, 20);
         drawScreen();
     }, 500);
 }
@@ -24,37 +31,22 @@ function stopMeasure() {
     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
+    Bangle.buzz(500, 20);
     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'); 
+    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); 
+    g.setFont('Vector', 15);
 
     // Draw the title
     g.setColor('#000000'); // Set text color to black
@@ -65,9 +57,9 @@ function drawScreen(message) {
         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) {
+        // Draw current heart rate if available and not zero
+        if (currentHeartRate !== null && currentHeartRate > 0) {
+            g.setFont('6x8', 4);
             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);
@@ -83,6 +75,8 @@ function drawScreen(message) {
         if (currentHeartRate !== null && currentHeartRate > 0) {
             g.setFont('6x8', 4);
             g.drawString(currentHeartRate.toString(), g.getWidth() / 2, g.getHeight() / 2 + 10);
+            g.setFont('6x8', 1.6);
+            g.drawString(' BPM', g.getWidth() / 2 + 42, g.getHeight() / 2 + 12);
         } else {
             g.setFont('6x8', 2);
             g.drawString('No data', g.getWidth() / 2, g.getHeight() / 2 + 10);
@@ -96,14 +90,78 @@ function drawScreen(message) {
 }
 
 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);
+    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}`;
+
+    // Check if 10 seconds have passed since the last heart rate log
+    if (date.getTime() - lastHeartRateLogTimestamp >= 10 * 1000) {
+        logData.push({ timestamp: timestamp, heartRate: currentHeartRate });
+        lastHeartRateLogTimestamp = date.getTime(); // Update the last heart rate log timestamp
+
+        // Log data to CSV
+        let csvContent = "Timestamp,Heart Rate,HRV (ms)\n";
+        logData.forEach(entry => {
+            if (entry.heartRate > 0) {
+                let hrv = hrvValues[entry.timestamp] || ""; // Get HRV value for the timestamp
+                csvContent += `${entry.timestamp},${entry.heartRate},${hrv}\n`;
+            }
+        });
+        require("Storage").write("heart_rate_data.csv", csvContent);
+    }
 }
 
-setWatch(function() {
+function handleHeartRate(hrm) {
+    if (isMeasuring) {
+        currentHeartRate = hrm.bpm;
+        drawScreen();
+
+        // Log data to CSV
+        saveDataToCSV();
+
+        // Estimate RR intervals
+        let rrIntervals = estimateRRIntervals(bpmValues);
+
+        // Calculate HRV
+        calculateHRV(rrIntervals);
+    }
+}
+
+function estimateRRIntervals(rawData) {
+    let rrIntervals = [];
+    for (let i = 1; i < rawData.length; i++) {
+        let rrInterval = rawData[i] - rawData[i - 1];
+        rrIntervals.push(rrInterval);
+    }
+    return rrIntervals;
+}
+
+function calculateHRV(rawData) {
+    // Calculate HRV with SDNN method for each slot in hrvSlots
+    let sdnn = calcSDNN(rawData);
+    hrvValues[Date.now()] = sdnn; // Store HRV value with current timestamp
+
+    // Log HRV data if 5 minutes have elapsed
+    if (Date.now() - lastHeartRateLogTimestamp >= 5 * 60 * 1000) {
+        console.log("Recalculating HRV...");
+        saveDataToCSV(); // Save both heart rate and HRV data to the CSV file
+        lastHeartRateLogTimestamp = Date.now(); // Update the timestamp
+    }
+}
+
+function calcSDNN(rrIntervals) {
+    let sumOfDifferencesSquared = 0;
+    let meanRRInterval = rrIntervals.reduce((acc, val) => acc + val, 0) / rrIntervals.length;
+    rrIntervals.forEach(rr => {
+        sumOfDifferencesSquared += Math.pow(rr - meanRRInterval, 2);
+    });
+    let meanOfDifferencesSquared = sumOfDifferencesSquared / (rrIntervals.length - 1);
+    return Math.sqrt(meanOfDifferencesSquared);
+}
+
+setWatch(function () {
     if (!isMeasuring) {
         startMeasure();
     } else {

From 26bce85bdabd38b3cd2ef98258ce8e3fb02224a0 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Mon, 15 Apr 2024 23:14:55 -0400
Subject: [PATCH 31/52] testing

---
 apps/phystrax/app.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index ec2409c94..82cab3900 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -81,7 +81,7 @@ function drawScreen(message) {
             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);
+            g.drawString(message || 'Press button to start!', g.getWidth() / 2, g.getHeight() / 2 + 30);
         }
     }
 

From 27d745f1ccdb2b85cde2b26e9bb7a3ad2fbe2ec2 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Mon, 15 Apr 2024 23:49:21 -0400
Subject: [PATCH 32/52] interface.html debug

---
 apps/phystrax/interface.html | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index 26e68abd6..e665486b6 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -21,7 +21,22 @@ function saveCSV(data, title) {
       csv += line + "\n";
     }
   }
-  Util.saveCSV(title, csv);
+
+  var blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
+  if (navigator.msSaveBlob) { // IE 10+
+    navigator.msSaveBlob(blob, title + ".csv");
+  } else {
+    var link = document.createElement("a");
+    if (link.download !== undefined) {
+      var url = URL.createObjectURL(blob);
+      link.setAttribute("href", url);
+      link.setAttribute("download", title + ".csv");
+      link.style.visibility = 'hidden';
+      document.body.appendChild(link);
+      link.click();
+      document.body.removeChild(link);
+    }
+  }
 }
 
 function downloadHeartRateData() {
@@ -32,7 +47,7 @@ function downloadHeartRateData() {
     if (data) {
       saveCSV(data, "Heart Rate Data");
     } else {
-      domContent.innerHTML = "<b>No heart rate data found</b>";
+      domContent.innerHTML = "<b>No heart rate data found!</b>";
     }
   }, error => {
     console.error("Error reading heart rate data:", error);

From 8fd8cf56ea762e7477bdbf7f22733068d016e0c2 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 14:38:33 -0400
Subject: [PATCH 33/52] edited app.js

---
 apps/phystrax/app.js | 172 ++++++++++++++++++++-----------------------
 1 file changed, 79 insertions(+), 93 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 82cab3900..0f403a067 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -1,15 +1,10 @@
-var isMeasuring = false;
-var currentHeartRate = null;
-var lcdTimeout;
-var bpmValues = [];
-var logData = [];
-var lastHeartRateLogTimestamp = 0;
+let isMeasuring = false;
+let currentHR = null;
+let lcdTimeout;
+let logData = [];
+let bpmValues = [];
+let lastLogTime = 0;
 
-// HRV calculation variables
-var hrvSlots = [10, 20, 30, 60, 120, 300];
-var hrvValues = {};
-
-// Heart rate monitor functions
 function startMeasure() {
     isMeasuring = true;
     Bangle.setLCDTimeout(0);
@@ -18,9 +13,9 @@ function startMeasure() {
     }, 50000);
 
     setTimeout(() => {
-        Bangle.setHRMPower(1);
+        Bangle.setHRMPower(1); // starts HRM
         Bangle.on('HRM', handleHeartRate);
-        Bangle.buzz(500, 20);
+        Bangle.buzz(200, 10); // Buzz to indicate measurement start
         drawScreen();
     }, 500);
 }
@@ -30,23 +25,76 @@ function stopMeasure() {
     clearTimeout(lcdTimeout);
     Bangle.setLCDTimeout(10);
     Bangle.setHRMPower(0);
-    Bangle.removeAllListeners('HRM');
-    Bangle.buzz(500, 20);
+    Bangle.removeAllListeners('HRM'); //stop HRM
+    saveDataToCSV(); // Save data to CSV when measurement stops
+    Bangle.buzz(200, 10); // Buzz to indicate measurement stop
     drawScreen();
 }
 
+function handleHeartRate(hrm) {
+    if (hrm.confidence > 90) {
+        currentHR = hrm.bpm;
+        let currentTime = Date.now();
+        let elaspedTime = currentTime - lastLogTime;
+        let nextLog = 5 * 1000 - (elaspedTime % (5 * 1000)); // Calculate time to next log
+        if (elaspedTime >= 5 * 1000) { // Check if it's time for the next log
+            lastLogTime = currentTime - (elaspedTime % (5 * 1000)); // Set last log time to the previous 5-second boundary
+            let date = new Date(lastLogTime);
+            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: currentHR });
+            bpmValues.push(currentHR); // Store heart rate for HRV calculation
+            if (bpmValues.length > 30) bpmValues.shift(); // Keep last 30 heart rate values
+            // Calculate and add SDNN (standard deviation of NN intervals) to the last log entry
+            logData[logData.length - 1].hrv = calcSDNN();
+            drawScreen();
+        }
+        // Schedule next measurement
+        setTimeout(() => {
+            handleHeartRate(hrm);
+        }, nextLog);
+    }
+}
+
+
+function calcSDNN() {
+    if (bpmValues.length < 5) return 0; // No calculation if insufficient data
+
+    // Calculate differences between adjacent heart rate values
+    const differences = [];
+    for (let i = 1; i < bpmValues.length; i++) {
+        differences.push(Math.abs(bpmValues[i] - bpmValues[i - 1]));
+    }
+
+    // Calculate mean difference
+    const meanDifference = differences.reduce((acc, val) => acc + val, 0) / differences.length;
+
+    // Calculate squared differences from mean difference
+    const squaredDifferences = differences.map(diff => Math.pow(diff - meanDifference, 2));
+
+    // Calculate mean squared difference
+    const meanSquaredDifference = squaredDifferences.reduce((acc, val) => acc + val, 0) / squaredDifferences.length;
+
+    // Calculate SDNN (standard deviation of NN intervals)
+    const sdnn = Math.sqrt(meanSquaredDifference);
+
+    return sdnn;
+}
+
 function drawScreen(message) {
     g.clear(); // Clear the display
 
     // Set the background color
-    g.setColor('#95E7FF');
+    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);
+    g.setFont('Vector', 15); 
 
     // Draw the title
     g.setColor('#000000'); // Set text color to black
@@ -57,12 +105,13 @@ function drawScreen(message) {
         g.setFont('6x8', 2);
         g.drawString('Measuring...', g.getWidth() / 2, g.getHeight() / 2 - 10);
 
-        // Draw current heart rate if available and not zero
-        if (currentHeartRate !== null && currentHeartRate > 0) {
-            g.setFont('6x8', 4);
-            g.drawString(currentHeartRate.toString(), g.getWidth() / 2, g.getHeight() / 2 + 20);
+        // Draw current heart rate if available
+        g.setFont('6x8', 4);
+        if (currentHR !== null) {
+            g.drawString(currentHR.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
@@ -72,16 +121,17 @@ function drawScreen(message) {
         // 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) {
+        if (currentHR !== null && currentHR > 0) {
             g.setFont('6x8', 4);
-            g.drawString(currentHeartRate.toString(), g.getWidth() / 2, g.getHeight() / 2 + 10);
+            g.drawString(currentHR.toString(), g.getWidth() / 2, g.getHeight() / 2 + 10);
             g.setFont('6x8', 1.6);
             g.drawString(' BPM', g.getWidth() / 2 + 42, g.getHeight() / 2 + 12);
+
         } 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);
+            g.drawString(message || 'Press button to start', g.getWidth() / 2, g.getHeight() / 2 + 30);
         }
     }
 
@@ -90,78 +140,14 @@ function drawScreen(message) {
 }
 
 function saveDataToCSV() {
-    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}`;
-
-    // Check if 10 seconds have passed since the last heart rate log
-    if (date.getTime() - lastHeartRateLogTimestamp >= 10 * 1000) {
-        logData.push({ timestamp: timestamp, heartRate: currentHeartRate });
-        lastHeartRateLogTimestamp = date.getTime(); // Update the last heart rate log timestamp
-
-        // Log data to CSV
-        let csvContent = "Timestamp,Heart Rate,HRV (ms)\n";
-        logData.forEach(entry => {
-            if (entry.heartRate > 0) {
-                let hrv = hrvValues[entry.timestamp] || ""; // Get HRV value for the timestamp
-                csvContent += `${entry.timestamp},${entry.heartRate},${hrv}\n`;
-            }
-        });
-        require("Storage").write("heart_rate_data.csv", csvContent);
-    }
-}
-
-function handleHeartRate(hrm) {
-    if (isMeasuring) {
-        currentHeartRate = hrm.bpm;
-        drawScreen();
-
-        // Log data to CSV
-        saveDataToCSV();
-
-        // Estimate RR intervals
-        let rrIntervals = estimateRRIntervals(bpmValues);
-
-        // Calculate HRV
-        calculateHRV(rrIntervals);
-    }
-}
-
-function estimateRRIntervals(rawData) {
-    let rrIntervals = [];
-    for (let i = 1; i < rawData.length; i++) {
-        let rrInterval = rawData[i] - rawData[i - 1];
-        rrIntervals.push(rrInterval);
-    }
-    return rrIntervals;
-}
-
-function calculateHRV(rawData) {
-    // Calculate HRV with SDNN method for each slot in hrvSlots
-    let sdnn = calcSDNN(rawData);
-    hrvValues[Date.now()] = sdnn; // Store HRV value with current timestamp
-
-    // Log HRV data if 5 minutes have elapsed
-    if (Date.now() - lastHeartRateLogTimestamp >= 5 * 60 * 1000) {
-        console.log("Recalculating HRV...");
-        saveDataToCSV(); // Save both heart rate and HRV data to the CSV file
-        lastHeartRateLogTimestamp = Date.now(); // Update the timestamp
-    }
-}
-
-function calcSDNN(rrIntervals) {
-    let sumOfDifferencesSquared = 0;
-    let meanRRInterval = rrIntervals.reduce((acc, val) => acc + val, 0) / rrIntervals.length;
-    rrIntervals.forEach(rr => {
-        sumOfDifferencesSquared += Math.pow(rr - meanRRInterval, 2);
+    let csvContent = "Timestamp,Heart Rate(bpm),HRV(ms)\n";
+    logData.forEach(entry => {
+        csvContent += `${entry.timestamp},${entry.heartRate},${entry.hrv}\n`;
     });
-    let meanOfDifferencesSquared = sumOfDifferencesSquared / (rrIntervals.length - 1);
-    return Math.sqrt(meanOfDifferencesSquared);
+    require("Storage").write("heart_rate_data.csv", csvContent);
 }
 
-setWatch(function () {
+setWatch(function() {
     if (!isMeasuring) {
         startMeasure();
     } else {

From f223e10f0f999c5d3efd1245ee8d310fdc0a61ee Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 15:18:19 -0400
Subject: [PATCH 34/52] testing

---
 apps/phystrax/interface.html | 70 +++++++++++++-----------------------
 1 file changed, 25 insertions(+), 45 deletions(-)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index e665486b6..bc6ef215a 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -3,63 +3,43 @@
     <link rel="stylesheet" href="../../css/spectre.min.css">
   </head>
   <body>
-    <div id="content"></div>
+    <div id="data"></div>
 
     <script src="../../core/lib/interface.js"></script>
     <script>
-const DB_RECORD_LEN = 2; 
-const DB_HEADER_LEN = 1; 
+var dataElement = document.getElementById("data");
 
-var domContent = document.getElementById("content");
-
-function saveCSV(data, title) {
-  var csv = "Timestamp,Heart Rate\n";
-  var lines = data.split("\n");
-  for (var i = 0; i < lines.length; i++) {
-    var line = lines[i];
-    if (line) {
-      csv += line + "\n";
-    }
-  }
-
-  var blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
-  if (navigator.msSaveBlob) { // IE 10+
-    navigator.msSaveBlob(blob, title + ".csv");
-  } else {
-    var link = document.createElement("a");
-    if (link.download !== undefined) {
-      var url = URL.createObjectURL(blob);
-      link.setAttribute("href", url);
-      link.setAttribute("download", title + ".csv");
-      link.style.visibility = 'hidden';
-      document.body.appendChild(link);
-      link.click();
-      document.body.removeChild(link);
-    }
-  }
-}
-
-function downloadHeartRateData() {
-  console.log("starting download...");
-  Util.showModal("Downloading Heart Rate Data...");
-  Util.readStorageFile("heart_rate_data.csv", data => { // Read data from specified file
-    Util.hideModal();
-    if (data) {
-      saveCSV(data, "Heart Rate Data");
+function getHeartRateData() {
+  Util.showModal("Loading...");
+  dataElement.innerHTML = "";
+  Puck.eval('require("Storage").list(/heart_rate_data\\.csv\\x01/)', files => {
+    if (files.length == 0) {
+      dataElement.innerHTML = "<p>No heart rate data found</p>";
     } else {
-      domContent.innerHTML = "<b>No heart rate data found!</b>";
+      files.forEach(fn => {
+        fn = fn.slice(0, -1);
+        var link = document.createElement("a");
+        link.setAttribute("href", "#");
+        link.textContent = fn;
+        link.addEventListener("click", function() {
+          Util.showModal("Downloading...");
+          Util.readStorageFile(fn, function(data) {
+            Util.saveCSV(fn.slice(0, -4), data);
+            Util.hideModal();
+          });
+        });
+        dataElement.appendChild(link);
+        dataElement.appendChild(document.createElement("br"));
+      });
     }
-  }, error => {
-    console.error("Error reading heart rate data:", error);
-    domContent.innerHTML = "<b>Error reading Heart Rate data</b>";
     Util.hideModal();
   });
 }
 
+// Called when app starts
 function onInit() {
-  downloadHeartRateData();
+  getHeartRateData();
 }
-
     </script>
   </body>
 </html>

From 6841bb2d00fbe114c9b81562e154de95aa004654 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 15:36:36 -0400
Subject: [PATCH 35/52] testing (editing metadata)

---
 apps/phystrax/metadata.json | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index 68a2cde56..439eaacaf 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -8,6 +8,9 @@
   "interface": "interface.html",
   "readme": "README.md",
   "supports": ["BANGLEJS2"],
+  "permissions": {
+    "read": ["file"]
+  },
   "storage": [
     {"name":"phystrax.app.js","url":"app.js"},
     {"name":"phystrax.img","url":"app-icon.js","evaluate":true}

From 0627d757b375e57724be7d668813f16b631d2798 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 16:48:04 -0400
Subject: [PATCH 36/52] fix file saving

---
 apps/phystrax/app.js         | 18 ++++++++++------
 apps/phystrax/interface.html | 42 +++++++++++++++++++++++++-----------
 apps/phystrax/metadata.json  |  6 ++----
 3 files changed, 44 insertions(+), 22 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 0f403a067..15cab6b9d 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -4,6 +4,7 @@ let lcdTimeout;
 let logData = [];
 let bpmValues = [];
 let lastLogTime = 0;
+const MAX_LOGS = 9;
 
 function startMeasure() {
     isMeasuring = true;
@@ -58,7 +59,6 @@ function handleHeartRate(hrm) {
     }
 }
 
-
 function calcSDNN() {
     if (bpmValues.length < 5) return 0; // No calculation if insufficient data
 
@@ -87,14 +87,14 @@ function drawScreen(message) {
     g.clear(); // Clear the display
 
     // Set the background color
-    g.setColor('#95E7FF'); 
+    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); 
+    g.setFont('Vector', 15);
 
     // Draw the title
     g.setColor('#000000'); // Set text color to black
@@ -111,7 +111,6 @@ function drawScreen(message) {
             g.drawString(currentHR.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
@@ -126,7 +125,6 @@ function drawScreen(message) {
             g.drawString(currentHR.toString(), g.getWidth() / 2, g.getHeight() / 2 + 10);
             g.setFont('6x8', 1.6);
             g.drawString(' BPM', g.getWidth() / 2 + 42, g.getHeight() / 2 + 12);
-
         } else {
             g.setFont('6x8', 2);
             g.drawString('No data', g.getWidth() / 2, g.getHeight() / 2 + 10);
@@ -144,7 +142,15 @@ function saveDataToCSV() {
     logData.forEach(entry => {
         csvContent += `${entry.timestamp},${entry.heartRate},${entry.hrv}\n`;
     });
-    require("Storage").write("heart_rate_data.csv", csvContent);
+
+    // Find an available file number
+    let fileNum = 0;
+    while (require("Storage").read(`heart_rate_data_${fileNum}.csv`) !== undefined && fileNum <= MAX_LOGS) {
+        fileNum++;
+    }
+
+    // Write data to a CSV file
+    require("Storage").write(`heart_rate_data_${fileNum}.csv`, csvContent);
 }
 
 setWatch(function() {
diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index bc6ef215a..d372bfd70 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -9,36 +9,54 @@
     <script>
 var dataElement = document.getElementById("data");
 
-function getHeartRateData() {
+function getData() {
+  // show loading window
   Util.showModal("Loading...");
+  // get the data
   dataElement.innerHTML = "";
+  var promise = Promise.resolve();
   Puck.eval('require("Storage").list(/heart_rate_data\\.csv\\x01/)', files => {
     if (files.length == 0) {
       dataElement.innerHTML = "<p>No heart rate data found</p>";
     } else {
       files.forEach(fn => {
         fn = fn.slice(0, -1);
-        var link = document.createElement("a");
-        link.setAttribute("href", "#");
-        link.textContent = fn;
-        link.addEventListener("click", function() {
-          Util.showModal("Downloading...");
-          Util.readStorageFile(fn, function(data) {
-            Util.saveCSV(fn.slice(0, -4), data);
-            Util.hideModal();
+        dataElement.innerHTML += `
+<div class="card">
+  <div class="card-header">
+    <div class="card-title h5">${fn}</div>
+  </div>
+  <div class="card-footer">
+    <button class="btn btn-primary" fn="${fn}" act="save">Save</button>
+    <button class="btn" fn="${fn}" act="delete">Delete</button>
+  </div>
+</div>`;
+        promise = promise.then(function() {
+          document.querySelector(`.btn[fn='${fn}'][act='save']`).addEventListener("click", function() {
+            Util.showModal("Downloading...");
+            Util.readStorageFile(fn, function(data) {
+              Util.saveCSV(fn.slice(0, -4), data);
+              Util.hideModal();
+            });
+          });
+          document.querySelector(`.btn[fn='${fn}'][act='delete']`).addEventListener("click", function() {
+            Util.showModal("Deleting...");
+            Util.eraseStorageFile(fn, function() {
+              Util.hideModal();
+              getData();
+            });
           });
         });
-        dataElement.appendChild(link);
-        dataElement.appendChild(document.createElement("br"));
       });
     }
+    // remove window
     Util.hideModal();
   });
 }
 
 // Called when app starts
 function onInit() {
-  getHeartRateData();
+  getData();
 }
     </script>
   </body>
diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index 439eaacaf..58e0197b5 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -8,11 +8,9 @@
   "interface": "interface.html",
   "readme": "README.md",
   "supports": ["BANGLEJS2"],
-  "permissions": {
-    "read": ["file"]
-  },
   "storage": [
     {"name":"phystrax.app.js","url":"app.js"},
     {"name":"phystrax.img","url":"app-icon.js","evaluate":true}
-  ]
+  ],
+  "data": [{"wildcard":"heart_rate_data.?.csv"}]
 }
\ No newline at end of file

From c17b87ca47d6c3980f2980cf0d69a10d03aef11a Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 17:15:04 -0400
Subject: [PATCH 37/52] edited app.js

---
 apps/phystrax/app.js | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 15cab6b9d..b2eb31260 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -143,16 +143,26 @@ function saveDataToCSV() {
         csvContent += `${entry.timestamp},${entry.heartRate},${entry.hrv}\n`;
     });
 
-    // Find an available file number
+    // Check if the file already exists
     let fileNum = 0;
-    while (require("Storage").read(`heart_rate_data_${fileNum}.csv`) !== undefined && fileNum <= MAX_LOGS) {
+    let fileName = `heart_rate_data_${fileNum}.csv`;
+    while (require("Storage").read(fileName) !== undefined && fileNum <= MAX_LOGS) {
         fileNum++;
+        fileName = `heart_rate_data_${fileNum}.csv`;
     }
 
-    // Write data to a CSV file
-    require("Storage").write(`heart_rate_data_${fileNum}.csv`, csvContent);
+    // Prompt user for confirmation before overwriting existing file
+    if (require("Storage").read(fileName) !== undefined) {
+        if (!confirm("Overwrite existing file?")) {
+            return; // Do not overwrite file if user cancels
+        }
+    }
+
+    // Write data to the CSV file
+    require("Storage").write(fileName, csvContent);
 }
 
+
 setWatch(function() {
     if (!isMeasuring) {
         startMeasure();

From a3561498e46ec5c0ec300924f77548c06347e27b Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 17:27:44 -0400
Subject: [PATCH 38/52] edit interface.html

---
 apps/phystrax/interface.html | 85 ++++++++++++++++--------------------
 1 file changed, 38 insertions(+), 47 deletions(-)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index d372bfd70..cf5b9e535 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -7,57 +7,48 @@
 
     <script src="../../core/lib/interface.js"></script>
     <script>
-var dataElement = document.getElementById("data");
+      var dataElement = document.getElementById("data");
 
-function getData() {
-  // show loading window
-  Util.showModal("Loading...");
-  // get the data
-  dataElement.innerHTML = "";
-  var promise = Promise.resolve();
-  Puck.eval('require("Storage").list(/heart_rate_data\\.csv\\x01/)', files => {
-    if (files.length == 0) {
-      dataElement.innerHTML = "<p>No heart rate data found</p>";
-    } else {
-      files.forEach(fn => {
-        fn = fn.slice(0, -1);
-        dataElement.innerHTML += `
-<div class="card">
-  <div class="card-header">
-    <div class="card-title h5">${fn}</div>
-  </div>
-  <div class="card-footer">
-    <button class="btn btn-primary" fn="${fn}" act="save">Save</button>
-    <button class="btn" fn="${fn}" act="delete">Delete</button>
-  </div>
-</div>`;
-        promise = promise.then(function() {
-          document.querySelector(`.btn[fn='${fn}'][act='save']`).addEventListener("click", function() {
-            Util.showModal("Downloading...");
-            Util.readStorageFile(fn, function(data) {
-              Util.saveCSV(fn.slice(0, -4), data);
-              Util.hideModal();
+      function getHeartRateData() {
+        Util.showModal("Loading...");
+        dataElement.innerHTML = "";
+        Puck.eval('require("Storage").list(/heart_rate_data\\.csv\\x01/)', files => {
+          if (files.length == 0) {
+            dataElement.innerHTML = "<p>No heart rate data found</p>";
+          } else {
+            files.forEach(fn => {
+              fn = fn.slice(0, -1);
+              var link = document.createElement("a");
+              link.setAttribute("href", "#");
+              link.textContent = fn;
+              link.addEventListener("click", function() {
+                Util.showModal("Downloading...");
+                Util.readStorageFile(fn, function(data) {
+                  Util.saveCSV(fn.slice(0, -4), data);
+                  console.log("Downloaded file path:", fn); // Print file path to console
+                  Util.hideModal();
+                });
+              });
+              dataElement.appendChild(link);
+              dataElement.appendChild(document.createElement("br"));
             });
-          });
-          document.querySelector(`.btn[fn='${fn}'][act='delete']`).addEventListener("click", function() {
-            Util.showModal("Deleting...");
-            Util.eraseStorageFile(fn, function() {
-              Util.hideModal();
-              getData();
-            });
-          });
+          }
+          Util.hideModal();
         });
-      });
-    }
-    // remove window
-    Util.hideModal();
-  });
-}
+      }
 
-// Called when app starts
-function onInit() {
-  getData();
-}
+      function deleteHeartRateData() {
+        Util.showModal("Deleting...");
+        require("Storage").erase("heart_rate_data.csv", function() {
+          Util.hideModal();
+          getHeartRateData();
+        });
+      }
+
+      // Called when app starts
+      function onInit() {
+        getHeartRateData();
+      }
     </script>
   </body>
 </html>

From 439c3db81415d3e2c60b62b31f9784587c187e37 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 17:34:26 -0400
Subject: [PATCH 39/52] added console logging

---
 apps/phystrax/interface.html | 45 ++++++++++++++++++------------------
 1 file changed, 23 insertions(+), 22 deletions(-)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index cf5b9e535..d9007967f 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -10,32 +10,33 @@
       var dataElement = document.getElementById("data");
 
       function getHeartRateData() {
-        Util.showModal("Loading...");
-        dataElement.innerHTML = "";
-        Puck.eval('require("Storage").list(/heart_rate_data\\.csv\\x01/)', files => {
-          if (files.length == 0) {
+    Util.showModal("Loading...");
+    dataElement.innerHTML = "";
+    Puck.eval('require("Storage").list(/heart_rate_data\\.csv\\x01/)', files => {
+        console.log("Files found:", files); // Add this line to check files
+        if (files.length == 0) {
             dataElement.innerHTML = "<p>No heart rate data found</p>";
-          } else {
+        } else {
             files.forEach(fn => {
-              fn = fn.slice(0, -1);
-              var link = document.createElement("a");
-              link.setAttribute("href", "#");
-              link.textContent = fn;
-              link.addEventListener("click", function() {
-                Util.showModal("Downloading...");
-                Util.readStorageFile(fn, function(data) {
-                  Util.saveCSV(fn.slice(0, -4), data);
-                  console.log("Downloaded file path:", fn); // Print file path to console
-                  Util.hideModal();
+                fn = fn.slice(0, -1);
+                var link = document.createElement("a");
+                link.setAttribute("href", "#");
+                link.textContent = fn;
+                link.addEventListener("click", function() {
+                    Util.showModal("Downloading...");
+                    Util.readStorageFile(fn, function(data) {
+                        Util.saveCSV(fn.slice(0, -4), data);
+                        console.log("Downloaded file path:", fn); // Print file path to console
+                        Util.hideModal();
+                    });
                 });
-              });
-              dataElement.appendChild(link);
-              dataElement.appendChild(document.createElement("br"));
+                dataElement.appendChild(link);
+                dataElement.appendChild(document.createElement("br"));
             });
-          }
-          Util.hideModal();
-        });
-      }
+        }
+        Util.hideModal();
+    });
+}
 
       function deleteHeartRateData() {
         Util.showModal("Deleting...");

From f63295adb7738eae6d4ff1b28d5df88a90f7f522 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 17:51:36 -0400
Subject: [PATCH 40/52] edit interface.html

---
 apps/phystrax/interface.html | 118 ++++++++++++++++++++++++-----------
 1 file changed, 80 insertions(+), 38 deletions(-)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index d9007967f..342d99f14 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -7,49 +7,91 @@
 
     <script src="../../core/lib/interface.js"></script>
     <script>
-      var dataElement = document.getElementById("data");
+var dataElement = document.getElementById("data");
 
-      function getHeartRateData() {
-    Util.showModal("Loading...");
-    dataElement.innerHTML = "";
-    Puck.eval('require("Storage").list(/heart_rate_data\\.csv\\x01/)', files => {
-        console.log("Files found:", files); // Add this line to check files
-        if (files.length == 0) {
-            dataElement.innerHTML = "<p>No heart rate data found</p>";
-        } else {
-            files.forEach(fn => {
-                fn = fn.slice(0, -1);
-                var link = document.createElement("a");
-                link.setAttribute("href", "#");
-                link.textContent = fn;
-                link.addEventListener("click", function() {
-                    Util.showModal("Downloading...");
-                    Util.readStorageFile(fn, function(data) {
-                        Util.saveCSV(fn.slice(0, -4), data);
-                        console.log("Downloaded file path:", fn); // Print file path to console
-                        Util.hideModal();
-                    });
-                });
-                dataElement.appendChild(link);
-                dataElement.appendChild(document.createElement("br"));
+function getHeartRateData() {
+  // show loading window
+  Util.showModal("Loading...");
+  // get the data
+  dataElement.innerHTML = "";
+  var promise = Promise.resolve();
+  Puck.eval('require("Storage").list(/heart_rate_data\\.csv\\x01/)', files => {
+    console.log("Files found:", files); // Print files to console
+    if (files.length == 0) {
+      dataElement.innerHTML = "<p>No heart rate data found</p>";
+    } else {
+      files.forEach(fn => {
+        fn = fn.slice(0, -1);
+        dataElement.innerHTML += `
+<div class="card">
+  <div class="card-header">
+    <div class="card-title h5">${fn}</div>
+  </div>
+  <div class="card-footer">
+    <button class="btn btn-primary" fn="${fn}" act="save">Save</button>
+    <button class="btn" fn="${fn}" act="delete">Delete</button>
+  </div>
+</div>`;
+        promise = promise.then(function() {
+          document.querySelector(`.btn[fn='${fn}'][act='save']`).addEventListener("click", function() {
+            Util.showModal("Downloading...");
+            console.log("Downloaded file path:", fn); // Print file path to console
+            Util.readStorageFile(fn, function(data) {
+              Util.saveCSV(fn.slice(0, -4), data);
             });
-        }
-        Util.hideModal();
-    });
+          });
+          document.querySelector(`.btn[fn='${fn}'][act='delete']`).addEventListener("click", function() {
+            Util.showModal("Deleting...");
+            Util.eraseStorageFile(fn, function() {
+              Util.hideModal();
+              getHeartRateData();
+            });
+          });
+          return new Promise(resolve=>{
+            Puck.eval(`require("Storage").read(${JSON.stringify(fn)})`, csv=>{
+              var el = document.querySelector(`.card-body[fn='${fn}']`);
+              el.innerHTML = '<canvas width="400" height="100"></canvas>';
+              var c = el.firstChild;
+              var ctx = c.getContext("2d");
+              var lines = csv.split("\n");
+              var y = 50, sx = 400/lines.length, sy = 50/8;
+              function plot(n) {
+                var last;
+                ctx.beginPath();
+                lines.map((l,x)=>{
+                  l = l.split(",");
+                  var yc = y + parseFloat(l[n])*sy;
+                  if (!last) {
+                    ctx.moveTo(0, yc);
+                  } else {
+                    ctx.lineTo(x*sx, yc);
+                  }
+                  last = l;
+                });
+                ctx.stroke();
+              };
+              ctx.strokeStyle = 'red';
+              plot(0);
+              ctx.strokeStyle = 'green';
+              plot(1);
+              ctx.strokeStyle = 'blue';
+              plot(2);
+              resolve();
+            });
+          });
+        });
+      });
+    }
+    // remove window
+    Util.hideModal();
+  });
 }
 
-      function deleteHeartRateData() {
-        Util.showModal("Deleting...");
-        require("Storage").erase("heart_rate_data.csv", function() {
-          Util.hideModal();
-          getHeartRateData();
-        });
-      }
+// Called when app starts
+function onInit() {
+  getHeartRateData();
+}
 
-      // Called when app starts
-      function onInit() {
-        getHeartRateData();
-      }
     </script>
   </body>
 </html>

From f41e7c15edf88ada97166a9118bb79e31c6176dc Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 18:15:54 -0400
Subject: [PATCH 41/52] testing

---
 apps/phystrax/app.js         |  24 ++-------
 apps/phystrax/interface.html | 101 ++++++++++-------------------------
 2 files changed, 33 insertions(+), 92 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index b2eb31260..9d2836d8a 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -37,9 +37,9 @@ function handleHeartRate(hrm) {
         currentHR = hrm.bpm;
         let currentTime = Date.now();
         let elaspedTime = currentTime - lastLogTime;
-        let nextLog = 5 * 1000 - (elaspedTime % (5 * 1000)); // Calculate time to next log
-        if (elaspedTime >= 5 * 1000) { // Check if it's time for the next log
-            lastLogTime = currentTime - (elaspedTime % (5 * 1000)); // Set last log time to the previous 5-second boundary
+        let nextLog = 3000 - (elaspedTime % 3000); // Calculate time to next log (3 seconds)
+        if (elaspedTime >= 3000) { // Check if it's time for the next log
+            lastLogTime = currentTime - (elaspedTime % 3000); // Set last log time to the previous 3-second boundary
             let date = new Date(lastLogTime);
             let dateStr = require("locale").date(date);
             let timeStr = require("locale").time(date, 1);
@@ -143,22 +143,8 @@ function saveDataToCSV() {
         csvContent += `${entry.timestamp},${entry.heartRate},${entry.hrv}\n`;
     });
 
-    // Check if the file already exists
-    let fileNum = 0;
-    let fileName = `heart_rate_data_${fileNum}.csv`;
-    while (require("Storage").read(fileName) !== undefined && fileNum <= MAX_LOGS) {
-        fileNum++;
-        fileName = `heart_rate_data_${fileNum}.csv`;
-    }
-
-    // Prompt user for confirmation before overwriting existing file
-    if (require("Storage").read(fileName) !== undefined) {
-        if (!confirm("Overwrite existing file?")) {
-            return; // Do not overwrite file if user cancels
-        }
-    }
-
     // Write data to the CSV file
+    let fileName = "heart_rate_data.csv"; // Use consistent file name
     require("Storage").write(fileName, csvContent);
 }
 
@@ -171,4 +157,4 @@ setWatch(function() {
     }
 }, BTN1, { repeat: true, edge: 'rising' });
 
-drawScreen();
+drawScreen();
\ No newline at end of file
diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index 342d99f14..5ceb53e68 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -9,87 +9,42 @@
     <script>
 var dataElement = document.getElementById("data");
 
-function getHeartRateData() {
-  // show loading window
-  Util.showModal("Loading...");
-  // get the data
-  dataElement.innerHTML = "";
-  var promise = Promise.resolve();
-  Puck.eval('require("Storage").list(/heart_rate_data\\.csv\\x01/)', files => {
-    console.log("Files found:", files); // Print files to console
-    if (files.length == 0) {
-      dataElement.innerHTML = "<p>No heart rate data found</p>";
+function saveHeartRateData() {
+  Util.showModal("Saving...");
+  var csvContent = "Timestamp,Heart Rate(bpm),HRV(ms)\n";
+  // Assuming logData contains the heart rate data
+  logData.forEach(entry => {
+    csvContent += `${entry.timestamp},${entry.heartRate},${entry.hrv}\n`;
+  });
+  var fileName = "heart_rate_data.csv"; // Set the desired file name
+  Util.saveCSV(fileName, csvContent, function(success) {
+    if (success) {
+      dataElement.innerHTML = "<p>Heart rate data saved successfully</p>";
     } else {
-      files.forEach(fn => {
-        fn = fn.slice(0, -1);
-        dataElement.innerHTML += `
-<div class="card">
-  <div class="card-header">
-    <div class="card-title h5">${fn}</div>
-  </div>
-  <div class="card-footer">
-    <button class="btn btn-primary" fn="${fn}" act="save">Save</button>
-    <button class="btn" fn="${fn}" act="delete">Delete</button>
-  </div>
-</div>`;
-        promise = promise.then(function() {
-          document.querySelector(`.btn[fn='${fn}'][act='save']`).addEventListener("click", function() {
-            Util.showModal("Downloading...");
-            console.log("Downloaded file path:", fn); // Print file path to console
-            Util.readStorageFile(fn, function(data) {
-              Util.saveCSV(fn.slice(0, -4), data);
-            });
-          });
-          document.querySelector(`.btn[fn='${fn}'][act='delete']`).addEventListener("click", function() {
-            Util.showModal("Deleting...");
-            Util.eraseStorageFile(fn, function() {
-              Util.hideModal();
-              getHeartRateData();
-            });
-          });
-          return new Promise(resolve=>{
-            Puck.eval(`require("Storage").read(${JSON.stringify(fn)})`, csv=>{
-              var el = document.querySelector(`.card-body[fn='${fn}']`);
-              el.innerHTML = '<canvas width="400" height="100"></canvas>';
-              var c = el.firstChild;
-              var ctx = c.getContext("2d");
-              var lines = csv.split("\n");
-              var y = 50, sx = 400/lines.length, sy = 50/8;
-              function plot(n) {
-                var last;
-                ctx.beginPath();
-                lines.map((l,x)=>{
-                  l = l.split(",");
-                  var yc = y + parseFloat(l[n])*sy;
-                  if (!last) {
-                    ctx.moveTo(0, yc);
-                  } else {
-                    ctx.lineTo(x*sx, yc);
-                  }
-                  last = l;
-                });
-                ctx.stroke();
-              };
-              ctx.strokeStyle = 'red';
-              plot(0);
-              ctx.strokeStyle = 'green';
-              plot(1);
-              ctx.strokeStyle = 'blue';
-              plot(2);
-              resolve();
-            });
-          });
-        });
-      });
+      dataElement.innerHTML = "<p>Error saving heart rate data</p>";
+    }
+    Util.hideModal();
+  });
+}
+
+function deleteHeartRateData() {
+  Util.showModal("Deleting...");
+  var fileName = "heart_rate_data.csv"; // Set the desired file name
+  Util.eraseStorageFile(fileName, function(success) {
+    if (success) {
+      dataElement.innerHTML = "<p>Heart rate data deleted successfully</p>";
+    } else {
+      dataElement.innerHTML = "<p>Error deleting heart rate data</p>";
     }
-    // remove window
     Util.hideModal();
   });
 }
 
 // Called when app starts
 function onInit() {
-  getHeartRateData();
+  // Only show options to save or delete data
+  saveHeartRateData();
+  deleteHeartRateData();
 }
 
     </script>

From e0efdc75eaa0939fb755f54ac65ce04dc0909385 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 18:28:37 -0400
Subject: [PATCH 42/52] testing interface

---
 apps/phystrax/interface.html | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index 5ceb53e68..9b2e3890b 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -20,10 +20,11 @@ function saveHeartRateData() {
   Util.saveCSV(fileName, csvContent, function(success) {
     if (success) {
       dataElement.innerHTML = "<p>Heart rate data saved successfully</p>";
+      Util.hideModal(); // Move hideModal() call inside the success callback
     } else {
       dataElement.innerHTML = "<p>Error saving heart rate data</p>";
+      Util.hideModal(); // Move hideModal() call inside the error callback
     }
-    Util.hideModal();
   });
 }
 
@@ -36,7 +37,7 @@ function deleteHeartRateData() {
     } else {
       dataElement.innerHTML = "<p>Error deleting heart rate data</p>";
     }
-    Util.hideModal();
+    Util.hideModal(); // Always hide the modal after the operation completes
   });
 }
 

From 01a5d2c238b20e3f6acf24861fc13f701ca841fd Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Tue, 16 Apr 2024 18:56:01 -0400
Subject: [PATCH 43/52] edit interface file

---
 apps/phystrax/interface.html | 51 +++++++++++++++---------------------
 1 file changed, 21 insertions(+), 30 deletions(-)

diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index 9b2e3890b..92dad7d0b 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -9,43 +9,34 @@
     <script>
 var dataElement = document.getElementById("data");
 
-function saveHeartRateData() {
-  Util.showModal("Saving...");
-  var csvContent = "Timestamp,Heart Rate(bpm),HRV(ms)\n";
-  // Assuming logData contains the heart rate data
-  logData.forEach(entry => {
-    csvContent += `${entry.timestamp},${entry.heartRate},${entry.hrv}\n`;
-  });
-  var fileName = "heart_rate_data.csv"; // Set the desired file name
-  Util.saveCSV(fileName, csvContent, function(success) {
-    if (success) {
-      dataElement.innerHTML = "<p>Heart rate data saved successfully</p>";
-      Util.hideModal(); // Move hideModal() call inside the success callback
-    } else {
-      dataElement.innerHTML = "<p>Error saving heart rate data</p>";
-      Util.hideModal(); // Move hideModal() call inside the error callback
-    }
-  });
+function displayOptions() {
+  // Display options to save the heart rate data file
+  dataElement.innerHTML = `
+    <button class="btn btn-primary" onclick="saveHeartRateData()">Save</button>
+  `;
 }
 
-function deleteHeartRateData() {
-  Util.showModal("Deleting...");
-  var fileName = "heart_rate_data.csv"; // Set the desired file name
-  Util.eraseStorageFile(fileName, function(success) {
-    if (success) {
-      dataElement.innerHTML = "<p>Heart rate data deleted successfully</p>";
-    } else {
-      dataElement.innerHTML = "<p>Error deleting heart rate data</p>";
-    }
-    Util.hideModal(); // Always hide the modal after the operation completes
+function saveHeartRateData() {
+  Util.showModal("Saving...");
+  var fileName = "heart_rate_data.csv"; // Set the file name to save
+  // Read the heart rate data from the watch's storage
+  Util.readStorageFile(fileName, function(data) {
+    // Save the data to the device through app loader
+    Util.saveFileToDevice(fileName, data, function(success) {
+      if (success) {
+        dataElement.innerHTML = "<p>Heart rate data saved successfully</p>";
+      } else {
+        dataElement.innerHTML = "<p>Error saving heart rate data</p>";
+      }
+      Util.hideModal();
+    });
   });
 }
 
 // Called when app starts
 function onInit() {
-  // Only show options to save or delete data
-  saveHeartRateData();
-  deleteHeartRateData();
+  // Display option to save data
+  displayOptions();
 }
 
     </script>

From fdf7b1b117454e9f56ef6772eb167ff0a6c7cd0b Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Wed, 17 Apr 2024 10:57:45 -0400
Subject: [PATCH 44/52] edit app + interface file

---
 apps/phystrax/app.js         |  6 ++--
 apps/phystrax/interface.html | 67 +++++++++++++++++++++++-------------
 2 files changed, 47 insertions(+), 26 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 9d2836d8a..4c89f02d1 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -145,10 +145,10 @@ function saveDataToCSV() {
 
     // Write data to the CSV file
     let fileName = "heart_rate_data.csv"; // Use consistent file name
-    require("Storage").write(fileName, csvContent);
+    var file = require("Storage").open(fileName,"a"); // Open file in append mode
+    file.write(csvContent);
 }
 
-
 setWatch(function() {
     if (!isMeasuring) {
         startMeasure();
@@ -157,4 +157,4 @@ setWatch(function() {
     }
 }, BTN1, { repeat: true, edge: 'rising' });
 
-drawScreen();
\ No newline at end of file
+drawScreen();
diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index 92dad7d0b..fb550cb21 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -4,39 +4,60 @@
   </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 displayOptions() {
-  // Display options to save the heart rate data file
-  dataElement.innerHTML = `
-    <button class="btn btn-primary" onclick="saveHeartRateData()">Save</button>
-  `;
-}
-
-function saveHeartRateData() {
-  Util.showModal("Saving...");
-  var fileName = "heart_rate_data.csv"; // Set the file name to save
-  // Read the heart rate data from the watch's storage
-  Util.readStorageFile(fileName, function(data) {
-    // Save the data to the device through app loader
-    Util.saveFileToDevice(fileName, data, function(success) {
-      if (success) {
-        dataElement.innerHTML = "<p>Heart rate data saved successfully</p>";
-      } else {
-        dataElement.innerHTML = "<p>Error saving heart rate data</p>";
-      }
-      Util.hideModal();
-    });
+function getData() {
+  // show loading window
+  Util.showModal("Loading...");
+  // get the data
+  dataElement.innerHTML = "";
+  Util.readStorageFile(`heart_rate_data.csv`,data=>{
+    csvData = data.trim();
+    // remove 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 (bpm)</th>
+      <th>HRV (ms)</th>
+    </tr>`+data.trim().split("\n").map(l=>{
+      l = l.split(",");
+      return `<tr>
+      <td>${l[0]}</td>
+      <td>${l[1]}</td>
+      <td>${l[2]}</td>
+      </tr>`
+    }).join("\n")+"</table>";
   });
 }
 
+// You can call a utility function to save the data
+document.getElementById("btnSave").addEventListener("click", function() {
+  Util.saveCSV("heart_rate_data.csv", csvData);
+});
+// Or you can also delete the file
+document.getElementById("btnDelete").addEventListener("click", function() {
+  Util.showModal("Deleting...");
+  Util.eraseStorageFile("heart_rate_data.csv", function() {
+    Util.hideModal();
+    getData();
+  });
+});
 // Called when app starts
 function onInit() {
-  // Display option to save data
-  displayOptions();
+  getData();
 }
 
     </script>

From de7d6e82934571916503ea99350f53dcc58a4045 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Wed, 17 Apr 2024 12:08:50 -0400
Subject: [PATCH 45/52] updated app.js

---
 apps/phystrax/app.js | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 4c89f02d1..3f0191797 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -4,9 +4,9 @@ let lcdTimeout;
 let logData = [];
 let bpmValues = [];
 let lastLogTime = 0;
-const MAX_LOGS = 9;
 
 function startMeasure() {
+    logData = [];
     isMeasuring = true;
     Bangle.setLCDTimeout(0);
     lcdTimeout = setTimeout(() => {
@@ -33,8 +33,7 @@ function stopMeasure() {
 }
 
 function handleHeartRate(hrm) {
-    if (hrm.confidence > 90) {
-        currentHR = hrm.bpm;
+    if (isMeasuring && hrm.confidence > 85) {
         let currentTime = Date.now();
         let elaspedTime = currentTime - lastLogTime;
         let nextLog = 3000 - (elaspedTime % 3000); // Calculate time to next log (3 seconds)
@@ -45,6 +44,8 @@ function handleHeartRate(hrm) {
             let timeStr = require("locale").time(date, 1);
             let seconds = date.getSeconds();
             let timestamp = `${dateStr} ${timeStr}:${seconds}`; // Concatenate date, time, and seconds
+            currentHR = hrm.bpm;
+
             logData.push({ timestamp: timestamp, heartRate: currentHR });
             bpmValues.push(currentHR); // Store heart rate for HRV calculation
             if (bpmValues.length > 30) bpmValues.shift(); // Keep last 30 heart rate values
@@ -118,9 +119,9 @@ function drawScreen(message) {
         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 (currentHR !== null && currentHR > 0) {
+            g.setFont('Vector', 12);
+            g.drawString('Last Heart Rate:', g.getWidth() / 2, g.getHeight() / 2 - 20);
             g.setFont('6x8', 4);
             g.drawString(currentHR.toString(), g.getWidth() / 2, g.getHeight() / 2 + 10);
             g.setFont('6x8', 1.6);
@@ -140,15 +141,17 @@ function drawScreen(message) {
 function saveDataToCSV() {
     let csvContent = "Timestamp,Heart Rate(bpm),HRV(ms)\n";
     logData.forEach(entry => {
-        csvContent += `${entry.timestamp},${entry.heartRate},${entry.hrv}\n`;
+        // Scale HRV - placeholder
+        let scaledHRV = entry.hrv * 13.16; 
+        csvContent += `${entry.timestamp},${entry.heartRate},${scaledHRV}\n`;
     });
 
-    // Write data to the CSV file
-    let fileName = "heart_rate_data.csv"; // Use consistent file name
-    var file = require("Storage").open(fileName,"a"); // Open file in append mode
-    file.write(csvContent);
+    // Write data to the CSV file with the desired file name
+    let fileName = "heart_rate_data.csv"; 
+    require("Storage").write(fileName, csvContent);
 }
 
+
 setWatch(function() {
     if (!isMeasuring) {
         startMeasure();

From f6e172b616aedc5585178105222d1298136ff113 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Wed, 17 Apr 2024 12:44:47 -0400
Subject: [PATCH 46/52] edit app.js for file storage

---
 apps/phystrax/app.js | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 3f0191797..33c6f23d2 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -128,7 +128,7 @@ function drawScreen(message) {
             g.drawString(' BPM', g.getWidth() / 2 + 42, g.getHeight() / 2 + 12);
         } else {
             g.setFont('6x8', 2);
-            g.drawString('No data', g.getWidth() / 2, g.getHeight() / 2 + 10);
+            g.drawString('No data', g.getWidth() / 2, g.getHeight() / 2 + 5);
             g.setFont('6x8', 1);
             g.drawString(message || 'Press button to start', g.getWidth() / 2, g.getHeight() / 2 + 30);
         }
@@ -139,19 +139,22 @@ function drawScreen(message) {
 }
 
 function saveDataToCSV() {
-    let csvContent = "Timestamp,Heart Rate(bpm),HRV(ms)\n";
+    let fileName = "heart_rate_data.csv";
+    let file = require("Storage").open(fileName, "a"); // Open the file for appending
+
+    // Check if the file is empty (i.e., newly created)
+    if (file.getLength() === 0) {
+        // Write the header if the file is empty
+        file.write("Timestamp,Heart Rate(bpm),HRV(ms)\n");
+    }
+
+    // Append the data
     logData.forEach(entry => {
-        // Scale HRV - placeholder
-        let scaledHRV = entry.hrv * 13.16; 
-        csvContent += `${entry.timestamp},${entry.heartRate},${scaledHRV}\n`;
+        file.write(`${entry.timestamp},${entry.heartRate},${entry.hrv}\n`);
     });
 
-    // Write data to the CSV file with the desired file name
-    let fileName = "heart_rate_data.csv"; 
-    require("Storage").write(fileName, csvContent);
 }
 
-
 setWatch(function() {
     if (!isMeasuring) {
         startMeasure();

From 56ac7aa297dfd7a794409a583cbbfc4bdc6d988e Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Wed, 17 Apr 2024 12:53:29 -0400
Subject: [PATCH 47/52] slight app.js tweaking

---
 apps/phystrax/app.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 33c6f23d2..56ab61cd0 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -150,7 +150,8 @@ function saveDataToCSV() {
 
     // Append the data
     logData.forEach(entry => {
-        file.write(`${entry.timestamp},${entry.heartRate},${entry.hrv}\n`);
+        let scaledHRV = entry.hrv * 13.61;
+        file.write(`${entry.timestamp},${entry.heartRate},${scaledHRV}\n`);
     });
 
 }

From 2b8471cc3607e8cc8760fb6d358796ac6e61e1fb Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Thu, 18 Apr 2024 14:28:40 -0400
Subject: [PATCH 48/52] increased confidence interval

---
 apps/phystrax/app.js | 37 ++++++++++++++-----------------------
 1 file changed, 14 insertions(+), 23 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index 56ab61cd0..d2ba21ee6 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -33,30 +33,21 @@ function stopMeasure() {
 }
 
 function handleHeartRate(hrm) {
-    if (isMeasuring && hrm.confidence > 85) {
-        let currentTime = Date.now();
-        let elaspedTime = currentTime - lastLogTime;
-        let nextLog = 3000 - (elaspedTime % 3000); // Calculate time to next log (3 seconds)
-        if (elaspedTime >= 3000) { // Check if it's time for the next log
-            lastLogTime = currentTime - (elaspedTime % 3000); // Set last log time to the previous 3-second boundary
-            let date = new Date(lastLogTime);
-            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
-            currentHR = hrm.bpm;
+    if (isMeasuring && hrm.confidence > 90) {
+        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
+        currentHR = hrm.bpm;
 
-            logData.push({ timestamp: timestamp, heartRate: currentHR });
-            bpmValues.push(currentHR); // Store heart rate for HRV calculation
-            if (bpmValues.length > 30) bpmValues.shift(); // Keep last 30 heart rate values
-            // Calculate and add SDNN (standard deviation of NN intervals) to the last log entry
-            logData[logData.length - 1].hrv = calcSDNN();
-            drawScreen();
-        }
-        // Schedule next measurement
-        setTimeout(() => {
-            handleHeartRate(hrm);
-        }, nextLog);
+        logData.push({ timestamp: timestamp, heartRate: currentHR });
+        bpmValues.push(currentHR); // Store heart rate for HRV calculation
+        if (bpmValues.length > 30) bpmValues.shift(); // Keep last 30 heart rate values
+        // Calculate and add SDNN (standard deviation of NN intervals) to the last log entry
+        logData[logData.length - 1].hrv = calcSDNN();
+        drawScreen();
+        
     }
 }
 

From 47ed20f7fbf083ff62e29bf1e1ca512d86e17609 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Sun, 21 Apr 2024 14:56:50 -0400
Subject: [PATCH 49/52] made final changes

---
 apps/phystrax/ChangeLog | 1 +
 apps/phystrax/app.js    | 1 -
 2 files changed, 1 insertion(+), 1 deletion(-)
 create mode 100644 apps/phystrax/ChangeLog

diff --git a/apps/phystrax/ChangeLog b/apps/phystrax/ChangeLog
new file mode 100644
index 000000000..3bc4ef732
--- /dev/null
+++ b/apps/phystrax/ChangeLog
@@ -0,0 +1 @@
+0.01: New App.
\ No newline at end of file
diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index d2ba21ee6..e51d0ab7f 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -3,7 +3,6 @@ let currentHR = null;
 let lcdTimeout;
 let logData = [];
 let bpmValues = [];
-let lastLogTime = 0;
 
 function startMeasure() {
     logData = [];

From fe4939cbb7092ff0a08b304f2cd0d6ab6735fc9c Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Mon, 22 Apr 2024 10:40:24 -0400
Subject: [PATCH 50/52] does not need to specify wildcard pattern

---
 apps/phystrax/metadata.json | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index 58e0197b5..68a2cde56 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -11,6 +11,5 @@
   "storage": [
     {"name":"phystrax.app.js","url":"app.js"},
     {"name":"phystrax.img","url":"app-icon.js","evaluate":true}
-  ],
-  "data": [{"wildcard":"heart_rate_data.?.csv"}]
+  ]
 }
\ No newline at end of file

From d9e51ddbde0fc6dffa70e6a1855c7d118f608892 Mon Sep 17 00:00:00 2001
From: Elfreda Kwawu <ek06917@uga.edu>
Date: Mon, 22 Apr 2024 15:44:38 -0400
Subject: [PATCH 51/52] Added data entry

---
 apps/phystrax/metadata.json | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index 68a2cde56..c9e41b1db 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -11,5 +11,6 @@
   "storage": [
     {"name":"phystrax.app.js","url":"app.js"},
     {"name":"phystrax.img","url":"app-icon.js","evaluate":true}
-  ]
+  ],
+  "data": [{"wildcard":"phystrax_hrm.?.csv"}]
 }
\ No newline at end of file

From 261776b3cb4a99c713852343f00fd2a6031d8006 Mon Sep 17 00:00:00 2001
From: Rob Pilling <robpilling@gmail.com>
Date: Mon, 22 Apr 2024 20:48:43 +0100
Subject: [PATCH 52/52] phystrax: rename CSV, heart_rate_data -> phystrax_hrm

---
 apps/phystrax/app.js         | 4 ++--
 apps/phystrax/interface.html | 6 +++---
 apps/phystrax/metadata.json  | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/apps/phystrax/app.js b/apps/phystrax/app.js
index e51d0ab7f..3ecb5d04e 100644
--- a/apps/phystrax/app.js
+++ b/apps/phystrax/app.js
@@ -46,7 +46,7 @@ function handleHeartRate(hrm) {
         // Calculate and add SDNN (standard deviation of NN intervals) to the last log entry
         logData[logData.length - 1].hrv = calcSDNN();
         drawScreen();
-        
+
     }
 }
 
@@ -129,7 +129,7 @@ function drawScreen(message) {
 }
 
 function saveDataToCSV() {
-    let fileName = "heart_rate_data.csv";
+    let fileName = "phystrax_hrm.csv";
     let file = require("Storage").open(fileName, "a"); // Open the file for appending
 
     // Check if the file is empty (i.e., newly created)
diff --git a/apps/phystrax/interface.html b/apps/phystrax/interface.html
index fb550cb21..4d1933df6 100644
--- a/apps/phystrax/interface.html
+++ b/apps/phystrax/interface.html
@@ -17,7 +17,7 @@ function getData() {
   Util.showModal("Loading...");
   // get the data
   dataElement.innerHTML = "";
-  Util.readStorageFile(`heart_rate_data.csv`,data=>{
+  Util.readStorageFile(`phystrax_hrm.csv`,data=>{
     csvData = data.trim();
     // remove window
     Util.hideModal();
@@ -45,12 +45,12 @@ function getData() {
 
 // You can call a utility function to save the data
 document.getElementById("btnSave").addEventListener("click", function() {
-  Util.saveCSV("heart_rate_data.csv", csvData);
+  Util.saveCSV("phystrax_hrm.csv", csvData);
 });
 // Or you can also delete the file
 document.getElementById("btnDelete").addEventListener("click", function() {
   Util.showModal("Deleting...");
-  Util.eraseStorageFile("heart_rate_data.csv", function() {
+  Util.eraseStorageFile("phystrax_hrm.csv", function() {
     Util.hideModal();
     getData();
   });
diff --git a/apps/phystrax/metadata.json b/apps/phystrax/metadata.json
index c9e41b1db..bcc0be70d 100644
--- a/apps/phystrax/metadata.json
+++ b/apps/phystrax/metadata.json
@@ -12,5 +12,5 @@
     {"name":"phystrax.app.js","url":"app.js"},
     {"name":"phystrax.img","url":"app-icon.js","evaluate":true}
   ],
-  "data": [{"wildcard":"phystrax_hrm.?.csv"}]
-}
\ No newline at end of file
+  "data": [{"name":"phystrax_hrm.csv"}]
+}