New widget: Heart rate alarm

apps.json

@@ -1351,6 +1351,22 @@
       {"name":"pparrot.img","url":"party-parrot-icon.js","evaluate":true}
     ]
   },
+  {
+  "id": "hralarm",
+  "name": "Heart rate alarm",
+  "shortName":"HR Alarm",
+  "version":"0.01",
+  "description": "This invisible widget vibrates whenever the heart rate gets close to the upper limit or goes over or under the configured limits",
+  "icon": "widget.png",  
+  "type": "widget",
+  "tags": "widget",
+  "supports" : ["BANGLEJS2"],
+  "readme": "README.md",
+  "storage": [
+    {"name":"hralarm.wid.js","url":"widget.js"},
+    {"name":"hralarm.settings.js","url":"settings.js"}
+  ]
+  },
   {
     "id": "hrings",
     "name": "Hypno Rings",

apps/hralarm/ChangeLog

@@ -0,0 +1 @@
+0.01: New Widget!

apps/hralarm/README.md

@@ -0,0 +1,15 @@
+# Heart rate alarm
+
+This invisible widget vibrates whenever the heart rate gets close to the upper limit or goes over or under the configured limits.
+
+## Usage
+
+Configure the heart rate limits in the apps settings. This widget uses both 'HRM' and 'BTHRM' events.
+
+## Features
+
+Long vibration every 10 seconds on reaching upper limit, short vibrations between upper limit and warning threshold and an single vibration when reaching the lower limit again.
+
+## Requests/Creator
+
+https://github.com/halemmerich

apps/hralarm/settings.js

@@ -0,0 +1,57 @@
+(function(back) {
+  var FILE = "hralarm.json";
+  
+  var settings = Object.assign({
+    enabled: false,
+    upper: 180,
+    warning: 170,
+    lower: 150,
+  }, require('Storage').readJSON(FILE, true) || {});
+
+  function writeSettings() {
+    require('Storage').writeJSON(FILE, settings);
+  }
+
+  E.showMenu({
+    '': { 'title': 'HR Alarm' },
+    '< Back': back,
+    'Enabled': {
+      value: !!settings.enabled,
+      format: v => settings.enabled ? "On" : "Off",
+      onchange: v => {
+        settings.enabled = v;
+        writeSettings();
+      }
+    },
+    'Upper limit': {
+      value: settings.upper,
+      min: 0,
+      step:5,
+      max: 300,
+      onchange: v => {
+        settings.upper = v;
+        writeSettings();
+      }
+    },
+    'Lower limit': {
+      value: settings.lower,
+      min: 0,
+      step:5,
+      max: 300,
+      onchange: v => {
+        settings.lower = v;
+        writeSettings();
+      }
+    },
+    'Warning at': {
+      value: settings.warning,
+      min: 0,
+      step:5,
+      max: 300,
+      onchange: v => {
+        settings.warning = v;
+        writeSettings();
+      }
+    }
+  });
+})

apps/hralarm/widget.js

@@ -0,0 +1,27 @@
+(() => {
+  var settings = require('Storage').readJSON("hralarm.json", true) || {};
+  if (!settings.enabled){ Bangle.setHRMPower(0, 'hralarm'); return; }
+  Bangle.setHRMPower(1, 'hralarm');
+  var hitLimit = 0;
+  var checkHr = function(hr){
+    if (hr.bpm > settings.warning && hr.bpm <= settings.upper){
+      Bangle.buzz(100, 1);
+    }
+    if (hitLimit < getTime() && hr.bpm > settings.upper){
+      hitLimit = getTime() + 10;
+      Bangle.buzz(2000, 1);
+    }
+    if (hitLimit > 0 && hr.bpm < settings.lower){
+      hitLimit = 0;
+      Bangle.buzz(500, 1);
+    }
+  };
+  Bangle.on("HRM", checkHr);
+  Bangle.on("BTHRM", checkHr);
+
+  WIDGETS["hralarm"]={
+    area:"tl",
+    width: 0,
+    draw: function(){}
+  };
+})()