[terminalclock] Add altitude to terminalclock

apps/terminalclock/ChangeLog

@@ -2,3 +2,4 @@
 0.02: Rename "Activity" in "Motion" and display the true values for it
 0.03: Add Banglejs 1 compatibility
 0.04: Fix settings bug
+0.05: Add altitude display

apps/terminalclock/app.js

@@ -1,6 +1,7 @@
 var locale = require("locale");
 var fontColor = g.theme.dark ? "#0f0" : "#000";
 var heartRate = 0;
+var altitude = -9001;
 
 // handling the differents versions of the Banglejs smartwatch
 if (process.env.HWVERSION == 1){
@@ -84,6 +85,14 @@ function drawHRM(pos){
     drawLine(">HR: unknown", pos);
 }
 
+function drawAltitude(pos){
+  clearField(pos);
+  if(altitude > 0)
+    drawLine(">Alt: " + altitude.toFixed(1) + "m", pos);
+  else
+    drawLine(">Alt: unknown", pos);
+}
+
 function drawActivity(pos){
   clearField(pos);
   var health = Bangle.getHealthStatus('last');
@@ -104,6 +113,10 @@ function draw(){
     drawDate(now, curPos);
     curPos++;
   }
+  if(settings.showAltitude){
+    drawAltitude(curPos);
+    curPos++;
+  }
   if(settings.showHRM){
     drawHRM(curPos);
     curPos++;
@@ -124,6 +137,18 @@ Bangle.on('HRM',function(hrmInfo) {
     heartRate = hrmInfo.bpm;
 });
 
+var MEDIANLENGTH = 20;
+var avr = [], median;
+Bangle.on('pressure', function(e) {
+  while (avr.length>MEDIANLENGTH) avr.pop();
+  avr.unshift(e.altitude);
+  median = avr.slice().sort();
+  if (median.length>10) {
+    var mid = median.length>>1;
+    altitude = E.sum(median.slice(mid-4,mid+5)) / 9;
+  }
+});
+
 
 // Clear the screen once, at startup
 g.clear();
@@ -135,7 +160,13 @@ var settings = Object.assign({
   showHRM: true,
   showActivity: true,
   showStepCount: true,
+  showAltitude: true,
 }, require('Storage').readJSON("terminalclock.json", true) || {});
+
+if(settings.showAltitude){
+  Bangle.setBarometerPower(true, "app");
+}
+
 // Show launcher when middle button pressed
 Bangle.setUI("clock");
 // Load widgets

apps/terminalclock/metadata.json

@@ -3,7 +3,7 @@
   "name": "Terminal Clock",
   "shortName":"Terminal Clock",
   "description": "A terminal cli like clock displaying multiple sensor data",
-  "version":"0.04",
+  "version":"0.05",
   "icon": "app.png",
   "type": "clock",
   "tags": "clock",

apps/terminalclock/settings.js

@@ -4,6 +4,7 @@
   var settings = Object.assign({
     HRMinConfidence: 50,
     showDate: true,
+    showAltitude: true,
     showHRM: true,
     showActivity: true,
     showStepCount: true,
@@ -33,6 +34,14 @@
         writeSettings();
       }
     },
+    'Show Altitude': {
+      value: settings.showAltitude,
+      format: v => v?"Yes":"No",
+      onchange: v => {
+        settings.showAltitude = v;
+        writeSettings();
+      }
+    },
     'Show HRM': {
       value: settings.showHRM,
       format: v => v?"Yes":"No",