BangleApps/apps/hidcam/app.js

var storage = require('Storage');

const settings = storage.readJSON('setting.json',1) || { HID: false };
const isB2 = process.env.HWVERSION === 2;
var sendHid, camShot, profile;

if (settings.HID=="kbmedia") {
  profile = 'camShutter';
  sendHid = function (code, cb) {

   try {
     NRF.sendHIDReport([1,code], () => { 
       NRF.sendHIDReport([1,0], () => {
         if (cb) cb();
       });
     });
   } catch(e) {
     print(e);
   }
	
  };
  camShot = function (cb) { sendHid(0x80, cb); };
} else {
	
  E.showPrompt("Enable HID?",{title:"HID disabled"}).then(function(enable) {

    if (enable) {
      settings.HID = "kbmedia";
      require("Storage").write('setting.json', settings);
      setTimeout(load, 1000, "hidcam.app.js");
    } else setTimeout(load, 1000);
  });
}
function drawApp() {
  g.clear();
  Bangle.loadWidgets();
  Bangle.drawWidgets();
  if (!isB2) { // Bangle.js 1
   g.fillCircle(122,127,60);
   g.drawImage(storage.read("hidcam.img"),100,105);
   const d = g.getWidth() - 18;
  } else {
   g.fillCircle(90,95,60);
   g.drawImage(storage.read("hidcam.img"),65,70);
   const d = g.getWidth() - 18;
  }
  function c(a) {
    return {
      width: 8,
      height: a.length,
      bpp: 1,
      buffer: (new Uint8Array(a)).buffer
    };
  }
  g.fillRect(180,130, 240, 124);
}

  if (camShot) { 
	if (!isB2) { // Bangle.js 1
                 setWatch(function(e) {
                   E.showMessage('camShot !');
                   Bangle.buzz(300, 1);
                   setTimeout(drawApp, 1000);
                   camShot(() => {});
                 }, BTN2, { edge:"falling",repeat:true,debounce:50});
               } else { // Bangle.js 2
                 setWatch(function(e) {
                   E.showMessage('camShot !');
                   Bangle.buzz(300, 1);
                   setTimeout(drawApp, 1000);
                   camShot(() => {});
                 }, BTN, { edge:"falling",repeat:true,debounce:50});
                 Bangle.on('touch', function (wat, tap) {
                      E.showMessage('camShot !');
                   Bangle.buzz(300, 1);
                   setTimeout(drawApp, 1000);
                   camShot(() => {});
                 });
               }
  drawApp();
 }