Save total distanced traveled

apps.json

@@ -2176,7 +2176,7 @@
     "name": "Cycling speed sensor",
     "shortName":"CSCSensor",
     "icon": "icons8-cycling-48.png",
-    "version":"0.02",
+    "version":"0.03",
     "description": "Read BLE enabled cycling speed and cadence sensor and display readings on watch",
     "tags": "outdoors,exercise,ble,bluetooth",
     "readme": "README.md",

apps/cscsensor/ChangeLog

@@ -1,2 +1,4 @@
 0.01: New app!
-0.02: Add wheel circumference settings dialog	
+0.02: Add wheel circumference settings dialog
+0.03: Save total distance traveled
+

apps/cscsensor/README.md

@@ -7,9 +7,10 @@ Currently the app displays the following data:
 - current speed
 - average speed
 - maximum speed
-- distance traveled
+- trip distance traveled
+- total distance traveled
 
-Button 1 resets all measurements.
+Button 1 resets all measurements except total distance traveled. The latter gets preserved by being written to storage every 0.2 miles and upon exitting the app.
 
 I do not have acces to a cadence sensor at the moment, so only the speed part is currently implemented. Values displayed are imperial or metric (depending on locale),
 the wheel circumference can be adjusted in the global settings app.

apps/cscsensor/cscsensor.app.js

@@ -1,10 +1,10 @@
-
 var device;
 var gatt;
 var service;
 var characteristic;
 
 const SETTINGS_FILE = 'cscsensor.json';
+const storage = require('Storage');
 
 class CSCSensor {
   constructor() {
@@ -12,9 +12,10 @@ class CSCSensor {
     this.lastTime = 0;
     this.lastBangleTime = Date.now();
     this.lastRevs = -1;
-    var settings = require('Storage').readJSON(SETTINGS_FILE, 1) || {};
-    this.wheelCirc = (settings.wheelcirc || 2230)/25.4;
-    console.log("wc = " + this.wheelCirc);
+    this.settings = storage.readJSON(SETTINGS_FILE, 1) || {};
+    this.settings.totaldist = this.settings.totaldist || 0;
+    this.totaldist = this.settings.totaldist;
+    this.wheelCirc = (this.settings.wheelcirc || 2230)/25.4;
     this.speedFailed = 0;
     this.speed = 0;
     this.maxSpeed = 0;
@@ -35,6 +36,7 @@ class CSCSensor {
   updateScreen() {
     var dist = this.distFactor*(this.lastRevs-this.lastRevsStart)*this.wheelCirc/63360.0;
     var ddist = Math.round(100*dist)/100;
+    var tdist = Math.round(this.distFactor*this.totaldist*10)/10;
     var dspeed = Math.round(10*this.distFactor*this.speed)/10; 
     var dmins = Math.floor(this.movingTime/60).toString();
     if (dmins.length<2) dmins = "0"+dmins;
@@ -44,23 +46,32 @@ class CSCSensor {
     var maxspeed = Math.round(10*this.distFactor*this.maxSpeed)/10;
     g.setFontAlign(1, -1, 0).setFontVector(18).setColor(1, 1, 0);
     g.drawString("Time:", 86, 60);
-    g.drawString("Speed:", 86, 94);
-    g.drawString("Ave spd:", 86, 128);
-    g.drawString("Max spd:", 86, 160);
-    g.drawString("Dist:", 86, 192);
-    g.setFontAlign(-1, -1, 0).setFontVector(24).setColor(1, 1, 1).clearRect(92, 60, 239, 240);
+    g.drawString("Speed:", 86, 92);
+    g.drawString("Ave spd:", 86, 124);
+    g.drawString("Max spd:", 86, 156);
+    g.drawString("Trip dist:", 86, 188);
+    g.drawString("Total:", 86, 220);
+    g.setFontAlign(-1, -1, 0).setFontVector(24).setColor(1, 1, 1).clearRect(92, 60, 239, 239);
     g.drawString(dmins+":"+dsecs, 92, 60);
-    g.drawString(dspeed+" "+this.speedUnit, 92, 94);
-    g.drawString(avespeed + " " + this.speedUnit, 92, 128);
-    g.drawString(maxspeed + " " + this.speedUnit, 92, 160);
-    g.drawString(ddist + " " + this.distUnit, 92, 192);    
+    g.drawString(dspeed+" "+this.speedUnit, 92, 92);
+    g.drawString(avespeed + " " + this.speedUnit, 92, 124);
+    g.drawString(maxspeed + " " + this.speedUnit, 92, 156);
+    g.drawString(ddist + " " + this.distUnit, 92, 188);
+    g.drawString(tdist + " " + this.distUnit, 92, 220);
   }
   updateSensor(event) {
     var qChanged = false;
     if (event.target.uuid == "0x2a5b") {
       var wheelRevs = event.target.value.getUint32(1, true);
       var dRevs = (this.lastRevs>0 ? wheelRevs-this.lastRevs : 0);
-      if (dRevs>0) qChanged = true;
+      if (dRevs>0) {
+        qChanged = true;
+        this.totaldist += dRevs*this.wheelCirc/63360.0;
+        if ((this.totaldist-this.settings.totaldist)>0.2) {
+          this.settings.totaldist = this.totaldist;
+          storage.writeJSON(SETTINGS_FILE, this.settings);
+        }
+      }
       this.lastRevs = wheelRevs;
       if (this.lastRevsStart<0) this.lastRevsStart = wheelRevs;
       var wheelTime = event.target.value.getUint16(5, true);
@@ -119,7 +130,10 @@ g.drawString("Scanning for CSC sensor...", 120, 120);
 
 setWatch(function() { mySensor.reset(); mySensor.updateScreen(); }, BTN1);
 
-Bangle.on('kill',()=>{ if (gatt!=undefined) gatt.disconnect()});
+Bangle.on('kill',()=>{ if (gatt!=undefined) gatt.disconnect()
+		       mySensor.settings.totaldist = mySensor.totaldist;
+		       storage.writeJSON(SETTINGS_FILE, this.settings);
+		     });
 
 Bangle.loadWidgets();
 Bangle.drawWidgets();