From db3eb8985abf29a81b4d56ebb3a34d16149a9178 Mon Sep 17 00:00:00 2001
From: Ben Jabituya <74158243+jabituyaben@users.noreply.github.com>
Date: Tue, 5 Jan 2021 19:04:50 +0000
Subject: [PATCH] Add files via upload

---
 apps/hrmdataexport/README.md    |   7 +++
 apps/hrmdataexport/app-icon.js  |   2 +
 apps/hrmdataexport/app-icon.png | Bin 0 -> 956 bytes
 apps/hrmdataexport/app.js       |  97 ++++++++++++++++++++++++++++++++
 4 files changed, 106 insertions(+)
 create mode 100644 apps/hrmdataexport/README.md
 create mode 100644 apps/hrmdataexport/app-icon.js
 create mode 100644 apps/hrmdataexport/app-icon.png
 create mode 100644 apps/hrmdataexport/app.js

diff --git a/apps/hrmdataexport/README.md b/apps/hrmdataexport/README.md
new file mode 100644
index 000000000..122b7f21e
--- /dev/null
+++ b/apps/hrmdataexport/README.md
@@ -0,0 +1,7 @@
+Extract hrm raw signal data to CSV file
+=======================================
+
+Simple app that will run the heart rate monitor for a defined period of time you set at the start. The max time value is 60 minutes but you can increase this just by changing the value in the app's script code if you wanted to - be mindful that your log file can get large and there are storage limitations if you start trying to log beyond this max.
+
+The hrm sensor is sampled @50Hz and this app does not do any processing on it, the array is written as-is. There is an example Python script that can process this signal, smooth it and also extract a myriad of heart rate variability metrics using the hrvanalysis library:
+https://github.com/jabituyaben/BangleJS-HRM-Signal-Processing
\ No newline at end of file
diff --git a/apps/hrmdataexport/app-icon.js b/apps/hrmdataexport/app-icon.js
new file mode 100644
index 000000000..356be780a
--- /dev/null
+++ b/apps/hrmdataexport/app-icon.js
@@ -0,0 +1,2 @@
+E.toArrayBuffer(atob("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA/AA/AAAD/4H/wAAP/8P/8AAf/+f/+AA/A//B/AA+AP8A/AB8AH4B/gB4ADwD/gDwABgH3wDwAAAPjwDwAAAfDwDwDAA+DwDwHgB8DwDwHwD4DwB4D4HwHgB4B8PgHgB8A+fAPgA8Af+APAA+AP8AfAAfAH4A+AAPgDwB8AAPwBgD8AAH4AAH4AAD4AAHwAAB+AAfgAAA/AA/AAAAfgB+AAAAPwD8AAAAH4H4AAAAD8PwAAAAB+fgAAAAA//AAAAAAf+AAAAAAP8AAAAAADwAAAAAABgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"))
+}
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diff --git a/apps/hrmdataexport/app-icon.png b/apps/hrmdataexport/app-icon.png
new file mode 100644
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GIT binary patch
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diff --git a/apps/hrmdataexport/app.js b/apps/hrmdataexport/app.js
new file mode 100644
index 000000000..e75eb5e44
--- /dev/null
+++ b/apps/hrmdataexport/app.js
@@ -0,0 +1,97 @@
+var counter = 1;
+var logging_started;
+var interval;
+var value;
+
+var file = require("Storage").open("hrm_log.csv", "w");
+file.write("");
+
+file = require("Storage").open("hrm_log.csv", "a");
+
+function update_timer() {
+    g.clear();
+    g.setColor("#00ff7f");
+    g.setFont("6x8", 4);
+    g.setFontAlign(0, 0); // center font
+
+    g.drawString(counter, 120, 120);
+    g.setFont("6x8", 2);
+    g.setFontAlign(-1, -1);
+    g.drawString("-", 220, 200);
+    g.drawString("+", 220, 40);
+    g.drawString("GO", 210, 120);
+
+    g.setColor("#ffffff");
+    g.setFontAlign(0, 0); // center font
+    g.drawString("Timer (minutes)", 120, 90);
+
+    g.setFont("6x8", 4); // bitmap font, 8x magnified
+
+    if (!logging_started)
+        g.flip();
+}
+
+function btn1Pressed() {
+    if (!logging_started) {
+        if (counter < 60)
+            counter += 1;
+        else
+            counter = 1;
+        update_timer();
+    }
+}
+
+function btn3Pressed() {
+    if (!logging_started) {
+        if (counter > 1)
+            counter -= 1;
+        else
+            counter = 60;
+        update_timer();
+    }
+}
+
+function btn2Pressed() {
+    launchtime = 0 | getTime();
+    file.write(launchtime + "," + "\n");
+    logging_started = true;
+    counter = counter * 60;
+    interval = setInterval(countDown, 1000);
+    Bangle.setHRMPower(1);
+}
+
+function fmtMSS(e) {
+    var m = Math.floor(e % 3600 / 60).toString().padStart(2, '0'),
+        s = Math.floor(e % 60).toString().padStart(2, '0');
+    return m + ':' + s;
+}
+
+function countDown() {
+    g.clear();
+    counter--;
+    if (counter == 0) {
+        Bangle.setHRMPower(0);
+        clearInterval(interval);
+        g.drawString("Finished", g.getWidth() / 2, g.getHeight() / 2);
+        Bangle.buzz(500, 1);
+    }
+    else
+        g.drawString(fmtMSS(counter), g.getWidth() / 2, g.getHeight() / 2);
+}
+
+update_timer();
+
+setWatch(btn1Pressed, BTN1, { repeat: true });
+setWatch(btn2Pressed, BTN2, { repeat: true });
+setWatch(btn3Pressed, BTN3, { repeat: true });
+
+Bangle.on('HRM', function (hrm) {
+    for (let i = 0; i < hrm.raw.length; i++) {
+        value = hrm.raw[i];
+        if (value < -2)
+            value = -2;
+        if (value > 6)
+            value = 6;
+        file.write(value + "," + "\n");
+    }
+});
\ No newline at end of file