Created a speed module (based on GPS data)

2022-06-05 09:52:40 +02:00 · 2022-06-05 09:52:40 +02:00 · 215ad65f3d
commit 215ad65f3d
parent 8b4a325e49
1 changed files with 98 additions and 0 deletions
--- a/speed.trailsense.js
+++ b/speed.trailsense.js
@ -0,0 +1,98 @@
+(() => {
+let STOR = require("Storage");
+let updateInterval;
+let lastSpeed;
+
+function drawFace() {
+  // variables
+  var first_run = true;
+  var naNShown = false;  // just for performance; if the speed is unknown, then refresh the display once
+  var speedFont = "6x8";
+  var speedSize = 8;
+  var speedNaNSize = 3;
+  var textFont = "Vector";
+  var textSize = 14;
+  var linePadding = 50;
+  var lineWidth = 2;
+  var maxSpeedFont = "Vector";
+  var maxSpeedSize = 20;
+  var maxSpeedTextSize = 10;
+  var maxSpeed = 0; // speed score
+  var maxSpeedEver = Number(STOR.read("maxspeed.trailsense.json")) || 0;
+
+  // Some initialization
+  Bangle.setGPSPower(true);
+  g.setColor(g.theme.bg);
+  g.fillRect(0,0,g.getWidth(), g.getHeight());
+  g.setColor(g.theme.fg2);
+  g.fillRect(0, linePadding-2, g.getWidth(), linePadding);
+  g.fillRect(0, g.getHeight()-linePadding, g.getWidth(), g.getHeight()-linePadding+2);
+  // text
+  g.setColor(g.theme.fg2);
+  g.setFont(textFont, textSize);
+  g.drawString("km/h", g.getWidth()/2, g.getHeight() - linePadding - 20);
+  g.drawString("Speed:", g.getWidth()/2, linePadding + 20);
+
+  g.setColor(g.theme.fg2);
+  g.setFont(maxSpeedFont, maxSpeedTextSize);
+  g.drawString("Maxspeed [km/h]: NOW/EVER", g.getWidth()/2, g.getHeight()-maxSpeedTextSize/2);
+
+  Bangle.loadWidgets();
+  Bangle.drawWidgets();
+
+  // utilitiy functions
+  function round(value, decimals) {
+    return Number(Math.round(value+'e'+decimals)+'e-'+decimals);
+  }
+
+
+  updateInterval = setInterval(
+  () => {
+    var gps_fix = Bangle.getGPSFix();
+    var speed = round(gps_fix.speed, 1);
+    if(speed<3.4) speed="0.0";
+    if(Number(speed)>maxSpeed) maxSpeed = speed;
+    if(maxSpeed > maxSpeedEver) { STOR.write("maxspeed.trailsense.json", maxSpeed.toString()); }
+    maxSpeedEver = Number(STOR.read("maxspeed.trailsense.json")) || 0;
+
+    if((speed != lastSpeed || first_run) && !isNaN(speed)) {
+      first_run = false;
+      naNShown = false;  // update naNShown for accidently signal loss (so that the loop down there can run again)
+
+      // clear screen
+      g.setColor(g.theme.bg);
+      g.fillRect(0, g.getHeight()/2-30, g.getWidth(), g.getHeight()/2+30);
+
+      // draw speed
+      g.setColor(g.theme.fg);
+      g.setFont(speedFont, speedSize);
+      g.drawString(speed, g.getWidth()/2, g.getHeight()/2);
+
+      // draw speed highscore
+      g.setColor(g.theme.bg);
+      g.fillRect(0, g.getHeight()-maxSpeedSize*2, g.getWidth(), g.getHeight()-maxSpeedSize/2)
+      g.setColor(g.theme.fg);
+      g.setFont(maxSpeedFont, maxSpeedSize);
+      g.drawString(round(maxSpeed, 1) + " / " + maxSpeedEver, g.getWidth()/2, g.getHeight()-maxSpeedSize);
+    } else if(isNaN(speed) && !naNShown) {
+      g.setColor(g.theme.bg);
+      g.fillRect(0, g.getHeight()/2-30, g.getWidth(), g.getHeight()/2+30);
+      g.setColor(g.theme.fg);
+      g.setFont(speedFont, speedNaNSize);
+      g.drawString("Loading...", g.getWidth()/2, g.getHeight()/2);
+
+      naNShown = true;
+    }
+    lastSpeed = speed;  // set last speed var for next loop
+  }, 100)
+}
+
+function stop() {
+  g.clear();
+  Bangle.setGPSPower(false);
+  print("[DEBUG] updateInterval=" + updateInterval);
+  clearInterval(updateInterval);
+}
+
+return { drawFace:drawFace, stop:stop };
+})();