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apps/breath/README.md

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+Breathing App
+=============
+This app attempts to aid relaxation and train breath syncronicity by providing a visualisation of a circle that expands and contracts to guide breathing rate. The app also modulates the vibration motor so you don't neccessarily have to look at the screen. Your HR is displayed in the lower left and there are a few parameters you can change to tailor what works best for you.
+
+Resonance frequency breathing is a way of breathing (slow relaxed diaphragmatic breathing at around 3-7 breaths per minute) that has a regulating effect on the autonomic nervous system and other key body systems such as the circulatory system. This has many benefits, supported by numerous studies e.g.:
+
+Increases pulmonary function
+Lowers blood pressure
+Improves baroreflex gain
+Improves heart rate variability
+Increases the ability to handle stress
+Clinical improvements in asthma

apps/breath/app-icon.js

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+require("heatshrink").decompress(atob("mEwxH+AH4A/AH4AFqoAFF94zoF5QxkF5gxiF/t5F92k5wvt5AvtvXOAAIvqvJeBF9i9BAAYvoFwovnvQuGF816XYYwiFw4tIF8qMHF86NJF8iOLGDqOMztV0YvOxIABF5qIB0l6RxFPp1VMBgtCGB4eDvTtH0dPL4gwHFQYwPXBjBTGBwvVYTIv/FyAviFpYuOF6bsOF8wqFFpxffACIuuF7llL99lGKKPeGKAvgGBzufF6XHAAPNFzIvUAAZqEFqC/SF44AkF/4A/AH4A/ADIA="))

apps/breath/app.js

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+var angle = -90;
+var origin = angle * (Math.PI / 180);
+var max_radius = 70;
+var direction = 1;
+var display_HR = "--";
+var first_signal = true;
+
+var colours = {
+    green: ["#00ff7f", "green"],
+    white: ["#ffffff", "white"],
+    blue: ["#00abff", "blue"],
+    red: ["#ff3329", "red"],
+    yellow: ["#fdff00", "yellow"]
+};
+
+var settings_file = require("Storage").open("breather_settings.txt", "r");
+
+var test = settings_file.read(settings_file.getLength());
+
+var settings;
+
+settings = JSON.parse(test);
+
+if (settings === undefined) {
+    settings = {
+        period: 2,
+        exhale_pause: 1,
+        inhale_pause: 1,
+        colour: colours.green,
+        vibrate: "forward",
+        ex_in_ratio: "1:1"
+    };
+}
+
+var interval;
+
+var timeout;
+
+var selection = ["speed", "exhale pause", "inhale pause", "colour", "vibrate",
+                 "ex_in_ratio", "in_progress", "paused"];
+
+var status = 0;
+
+var colours = {
+    green: ["#00ff7f", "green"],
+    white: ["#ffffff", "white"],
+    blue: ["#00abff", "blue"],
+    red: ["#ff3329", "red"],
+    yellow: ["#fdff00", "yellow"]
+};
+
+g.setFont("6x8", 2);
+
+function circle() {
+
+    g.clear();
+    adjusted_radius = max_radius * Math.abs(origin);
+    g.drawCircle(120, 120, adjusted_radius);
+    radius = Math.abs(Math.sin(origin));
+    angle += 2;
+    origin = angle * (Math.PI / 180);
+    if (angle >= 0 && angle < 90) {
+        if (angle == 2) {
+            clearInterval();
+            g.setFontAlign(-1, -1);
+            g.drawString("<<", 220, 40);
+            status = 7;
+            timeout = setTimeout(function () {
+                interval = restart_interval();
+            }, settings.inhale_pause * 1000);
+        }
+        direction = 0;
+    }
+    else {
+        if (angle == 90)
+            angle = -90;
+        if (angle == -90) {
+            clearInterval();
+            g.setFontAlign(-1, -1);
+            g.drawString("<<", 220, 40);
+            status = 7;
+            timeout = setTimeout(function () {
+                interval = restart_interval();
+            }, settings.exhale_pause * 1000);
+        }
+        direction = 1;
+    }
+    g.drawString(display_HR, 20, 200);
+
+    g.flip();
+
+    if (settings.vibrate == "forward")
+        Bangle.buzz(50, Math.abs(origin)/1.5);
+    else if (settings.vibrate == "backward")
+        Bangle.buzz(50, (1.6 - (Math.abs(origin))));
+}
+
+function restart_interval() {
+    status = 6;
+    var calc = 5 - settings.period;
+    calc *= 15;
+    calc += 120;
+    if(direction == 1 && settings.ex_in_ration == "5:6"){
+      calc -= calc*0.2;
+    }
+    interval = setInterval(circle, calc);
+}
+
+function update_menu() {
+    g.clear();
+    g.setColor(settings.colour[0]);
+    g.setFontAlign(-1, -1);
+    g.drawString("+/-", 200, 200);
+    g.drawString("<>", 220, 40);
+    g.drawString("GO", 210, 120);
+    g.setFontAlign(-1, -1);
+    var cursor = 60;
+
+    while (cursor < 180) {
+        var key = Object.keys(settings)[(cursor - 60) / 20];
+        var value = settings[key];
+      
+        if (status == ((cursor - 60) / 20)) {
+            g.setColor(colours.white[0]);
+        }
+        else
+            g.setColor(settings.colour[0]);
+
+        var display_txt = selection[(cursor - 60) / 20] + ": " + value;
+      
+        if(((cursor - 60) / 20) == 3)
+          display_txt = selection[(cursor - 60) / 20] + ": " + value[1];
+      
+        g.drawString(display_txt, 10, cursor);
+        cursor += 20;
+    }
+}
+
+function btn1Pressed() {
+    if (status < 6) {
+        status += 1;
+        if (status == 6)
+            status = 0;
+
+        update_menu();
+    }
+    else if (status == 7) {
+        clearTimeout(timeout);
+        clearInterval();
+        status = 0;
+        update_menu();
+    }
+}
+
+function btn2Pressed() {
+    if (status < 6) {
+        settings_file = require("Storage").open("breather_settings.txt", "w");
+        settings_file.write(JSON.stringify(settings));
+        Bangle.setHRMPower(1);
+        g.setColor(settings.colour[0]);
+        restart_interval();
+    }
+}
+
+function btn3Pressed() {
+    if (status < 6) {
+        if (status == 0) {
+            settings.period += 1;
+            if (settings.period > 6)
+                settings.period = 1;
+        }
+        else if (status == 1) {
+            settings.exhale_pause += 1;
+            if (settings.exhale_pause > 4)
+                settings.exhale_pause = 1;
+        }
+        else if (status == 2) {
+            settings.inhale_pause += 1;
+            if (settings.inhale_pause > 4)
+                settings.inhale_pause = 1;
+        }
+        else if (status == 3) {
+            if (settings.colour[0] == colours.green[0]) {
+                settings.colour = colours.blue;
+            }
+            else if (settings.colour[0] == colours.blue[0])
+                settings.colour = colours.red;
+            else if (settings.colour[0] == colours.red[0])
+                settings.colour = colours.yellow;
+            else if (settings.colour[0] == colours.yellow[0])
+                settings.colour = colours.green;
+        }
+        else if (status == 4) {
+            if (settings.vibrate == "forward")
+                settings.vibrate = "backward";
+            else if (settings.vibrate == "backward")
+                settings.vibrate = "off";
+            else if (settings.vibrate == "off")
+                settings.vibrate = "forward";
+        }
+        else if(status == 5){
+          if(settings.ex_in_ratio == "1:1")
+            settings.ex_in_ratio = "5:6";
+          else
+            settings.ex_in_ratio = "1:1";
+        }
+        update_menu();
+    }
+}
+
+update_menu();
+
+setWatch(btn1Pressed, BTN1, { repeat: true });
+setWatch(btn2Pressed, BTN2, { repeat: true });
+setWatch(btn3Pressed, BTN3, { repeat: true });
+
+Bangle.on('HRM', function (hrm) {
+    if (first_signal)
+        first_signal = false;
+    else{
+          var signal = hrm.bpm;
+          if(signal > 50 && signal < 180)
+            display_HR = signal;
+        }
+});

apps/breath/breather_settings.txt

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+{"period":3,"exhale_pause":1,"inhale_pause":2,"colour":["#00abff","blue"],"vibrate":"forward"}