Puck Media Controller (tested on OSX and iOS)

Hi Guys I just got my Puck unit today and have a try on it.
I am a designer so sorry for my dirty code.

Basically what I want to test is:

1. single click, double click, triple click (or more)
   
2. media control HID ( play/stop/next/prev/volume)
   
3. light on!
   
4. Magnet
   
   

The magnet part is the most hardest part for me .. and even now not really working good,
so please! enhance that and let me know!
After I play a while on my mac... then I connected it to my iPhone .. OMG its working too! miracle!

• special thanks @gomako for the rotating code!
  
  

How to play//

1. Single tap to send the Play/Pause singnal (suppose to launch the default player!)
   
2. Double tap for next song
   
3. Triple tap for Prev song
   

4. Press, hold and rotate for volume contorl

   /*
   Puck Media Controller
   By TC 2017.01.04
   
   This is the first test I got my Puck.js today.
   
   1.Single tap to send the Play/Pause singnal (suppose to launch the default player!)
   2.Double tap for next song
   3.Triple tap for Prev song
   4.Press, hold and rotate for volume contorl
   
   *Its working on iOS too!! miracle! 
   
   */
   
   
   var controls = require("ble_hid_controls");
   NRF.setServices(undefined, { hid : controls.report });
   
   var tempTimer = 0;
   var timerID = null;
   
   console.log("Battery : "+Puck.getBatteryPercentage()+"%");
   
   var init_mag = Puck.mag();
   var cur_mag,last_mag,IntervalID,offset_ang,volumeChanged;
   
   function cal_ang(xyz){
   //thanks! @gomako http://forum.espruino.com/profiles/95473/
   xyz.x -= init_mag.x;
   xyz.y -= init_mag.y;
   xyz.z -= init_mag.z;
   return (Math.atan2(xyz.y, xyz.x) * 180) / Math.PI;
   }
   var cur_ang = cal_ang(Puck.mag());
   var last_ang = cur_ang;
   
   //lisiten on press
   setWatch(function() {
   digitalWrite(LED3,1);
   start_mag();
   }, BTN, {edge:"rising", debounce:10, repeat:true});
   
   //lisiten on release
   setWatch(function() {
   stop_mag();
   if(volumeChanged === null){
   onBtnTap();
   }
   all_lights_off();
   }, BTN, {edge:"falling", debounce:10, repeat:true});
   
   
   function start_mag(){
   volumeChanged = null;
   IntervalID = setInterval(function () {
   cur_ang = cal_ang(Puck.mag());
   offset_ang = cur_ang - last_ang;
   if(Math.abs(offset_ang) > 3 && Math.abs(offset_ang) <90){
     if(offset_ang < 0){
       console.log(" - :" + offset_ang);
       controls.volumeDown();
     }else{
       console.log(" + :" + offset_ang);
       controls.volumeUp();
     }
     last_ang = cur_ang;
     volumeChanged = 1;
     all_lights_off();
     digitalWrite(LED2,1);
   }else if(Math.abs(offset_ang) > 90){
     last_ang = cur_ang;
   }
   }, 300);
   }
   
   function stop_mag(){
   clearInterval(IntervalID);
   }
   
   function onBtnTap(){
   if(timerID !== null){
   clearTimeout(timerID);
   }
   
   tempTimer+=1;
   
   timerID = setTimeout(function () {  
   if(tempTimer == 1){
     //single click
     controls.playpause();
   }else if(tempTimer == 2){
     //double click
     controls.next();
     console.log("next");
   }else if(tempTimer >= 3){
     //trible click
     controls.prev();
     console.log("prev");
   }
   
   //console.log(tempTimer + " clicks in 300ms!");
   //console.log("timerID:"+timerID);
   tempTimer = 0;
   timerID = null;
                             
   }, 300);
   }
   
   function all_lights_off(){
   digitalWrite(LED1,0);
   digitalWrite(LED2,0);
   digitalWrite(LED3,0);
   }