HughB

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• Bangle.getStepCount() vs Bangle.getHealthStatus("day").steps

  @HughB started

  • 2 comments
  • 6 views

  @myownself replied
• Bangle.getStepCount() vs Bangle.getHealthStatus("day").steps

  in Bangle.js • 2 hours, 39 minutes

  

  Wondering what exactly Bangle.getStepCount() returns. Step count from what point ?
  Also wonder what other options exist for Bangle.getHealthStatus(arg);

  >Bangle.getStepCount();
  =15200
  >
  >Bangle.getHealthStatus("day").steps
  =3768
  >
  >WIDGETS.wpedom.getSteps();
  =3733
  >
  >Bangle.getHealthStatus("week");
  Uncaught Error: Unknown range name "week"
   at line 1 col 30
  Bangle.getHealthStatus("week");
                               ^
  >Bangle.getHealthStatus("month");
  Uncaught Error: Unknown range name "month"
   at line 1 col 31
  Bangle.getHealthStatus("month");
                                ^
  > 
  

• Watchface Ideas

  in Bangle.js • 2 hours, 56 minutes

  

  this looks like a photoshop job, it almost feels like you could peel the sticker off the front of the watch :)

• Watchface Ideas

  in Bangle.js • 2 hours, 57 minutes

  

  Like it ! Could you have an option to put the time at the bottom, for when you can't be bothered to work it out :)

• Watchface Ideas

  in Bangle.js • 2 hours, 59 minutes

  

  The B2 screen has limitations in terms of how crisp images can be made, so many of these watch faces will look pretty dissappointing when attempted. The B2 has a 178x178 display where as most of these watches will be 380x380 or 400x400. The Amazfit GTS2 is 348x442.

• B2 GPS accuracy after AGPS is very good.

  in Bangle.js • 3 hours, 32 minutes

  

  I ran the code below after downloading from the AGPS app and was delighted to see that
  when it is stationary the GPS is really accurate and hdop was coming back as 0.8.
  It took quite a while for the max difference between points to reach 1.
  This means taking a fix every second on a B2 after its had AGPS is not going to cause any issues with apps like run.

  I did something similar on Bangle 1 (but AGPS mind) and it came out as a max of 18m between points.

  { "lat": 54.93713, "lon": -1.59312883333, "alt": 121.5, "speed": 0,
    "course": 0,
    "time": Date: Thu Jan 20 2022 21:59:14 GMT+0000,
    "satellites": 12, "fix": 1, "hdop": 0.8 }
  distance: 0
  avg=0 max_dist 0
  { "lat": 54.93713033333, "lon": -1.59312883333, "alt": 121.5, "speed": 0,
    "course": 0,
    "time": Date: Thu Jan 20 2022 21:59:15 GMT+0000,
    "satellites": 12, "fix": 1, "hdop": 0.8 }
  distance: 0
  avg=0 max_dist 0
  >
  

  let last_fix = {
    fix: 0,
    alt: 0,
    lat: 0,
    lon: 0,
    speed: 0,
    time: 0,
    satellites: 0
  };
  
  function radians(a) {
    return a*Math.PI/180;
  }
  
  function degrees(a) {
    var d = a*180/Math.PI;
    return (d+360)%360;
  }
  
  function distance(a,b){
    var x = radians(a.lon-b.lon) * Math.cos(radians((a.lat+b.lat)/2));
    var y = radians(b.lat-a.lat);
    return Math.round(Math.sqrt(x*x + y*y) * 6371000);
  }
  
  var total_dist = 0;
  var max_dist = 0;
  var avg_dist = 0;
  var fix_cnt = 1;
  
  function onGPS(fix) {
    if (fix.fix) {
      if (fix_cnt < 2) {
        last_fix = fix;
        fix_cnt++;
        return;
      }
      
      fix_cnt++;
      console.log("\n");
      console.log(fix);
      var dist = distance(last_fix, fix);
  
      last_fix = fix;
  
      console.log("distance: " + dist);
      if (dist > max_dist) max_dist = dist;
      total_dist = total_dist + dist
      avg_dist = total_dist / fix_cnt;
      console.log("avg=" + avg_dist + " max_dist " + max_dist);
  
    } else {
      console.log("Sats: " + fix.satellites);
    }
  
  }
  
  Bangle.setGPSPower(1);
  Bangle.on('GPS',onGPS);
  

• B2 GPS accuracy after AGPS is very good.

  @HughB started

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  @HughB replied
• Bangle.on('power' ..) or maybe Bangle.event.gpspower etc

  @HughB started

  • 6 comments
  • 142 views

  @HughB replied
• Bangle.on('power' ..) or maybe Bangle.event.gpspower etc

  in Bangle.js • 7 hours, 27 minutes

  

  Thanks will add it as a feature request for when you are stuck for something to do :)

  I do appreciate this is not a high priority.

• Review of Run App

  in Bangle.js • 12 hours, 14 minutes

  

  Lunchtime testing.

  Etrex 1.3m
  Amizfit 1.27m
  Run 1.2miles - but I suspect the locale is truncating and not rounding.

  I also noticed the distance is in meters to start with (as in 560m) . Then it switches to miles (as in 1.1mi) - very odd.

  Currently I am avoiding the GPS gitter by taking every 10th fix. I will try at every 5 seconds and then 2 but feel a fix every 1 second is bound to introduce errors - due to the snowflake effect I described earlier. I this an update every 5 seconds is enough in practice. Every 10 secnds is too long if you want to see it flip over when you are running.