recorder 0.48: Add ability to log average acceleration values

Author: gfwilliams

apps/recorder/ChangeLog

@@ -60,4 +60,5 @@
       Lower accuracy of barometer data to ~1cm (saves about 15b/record)
 0.47: Fix 'blip' on speed map on some recordings
       Ensure Battery voltage is only stored to 0.01v
-      Add graphs for Steps+Battery
+      Add graphs for Steps+Battery
+0.48: Add ability to log average acceleration values

apps/recorder/README.md

@@ -19,6 +19,7 @@ You can record
 * **BAT** Battery percentage and voltage
 * **Steps** Steps counted by the step counter
 * **Baro** (Bangle.js 2) Using the built-in barometer to record Temperature, Pressure and Altitude
+* **Accel**  Average acceleration values in X,Y and Z
 * **Core** CoreTemp body temperature *if* you have a CoreTemp device and the https://banglejs.com/apps/?id=coretemp app installed
 
 You can then start/stop recording from the Recorder app itself (and as long as widgets are

apps/recorder/lib.js

@@ -114,6 +114,28 @@ exports.getRecorders = function() {
         stop : () => {},
         draw : (x,y) => g.reset().drawImage(atob("DAwBAAMMeeeeeeeecOMMAAMMMMAA"),x,y)
       };
+    },
+    accel:function() {
+      var ax=0,ay=0,az=0,n=0;
+      function onAccel(a) {
+        ax += a.x;
+        ay += a.y;
+        az += a.z;
+        n++;
+      }
+      return {
+        name : "Accel",
+        fields : ["Accel X", "Accel Y", "Accel Z"],
+        getValues : () => {
+          if (n<1) n=1;
+          var r = [(ax/n).toFixed(2), (ay/n).toFixed(2), (az/n).toFixed(2)];
+          n = ax = ay = az = 0;
+          return r;
+        },
+        start : () => { Bangle.on('accel', onAccel); },
+        stop : () => { Bangle.removeListener('accel', onAccel); },
+        draw : (x,y) => g.reset().drawImage(atob("DAwBAAMMeeeeeeeecOMMAAMMMMAA"),x,y)
+      };
     }
   };
   if (Bangle.getPressure){

apps/recorder/metadata.json

@@ -2,7 +2,7 @@
   "id": "recorder",
   "name": "Recorder",
   "shortName": "Recorder",
-  "version": "0.47",
+  "version": "0.48",
   "description": "Record GPS position, heart rate and more in the background, then download to your PC.",
   "icon": "app.png",
   "tags": "tool,outdoors,gps,widget,clkinfo",