How to make a web app for your own Bluetooth Low Energy device? Step 6

main.js

function requestBluetoothDevice() {
  log('Requesting bluetooth device...');

  return navigator.bluetooth.requestDevice({
    filters: [{services: [0xFFE0]}],
  }).
      then(device => {
        log('"' + device.name + '" bluetooth device selected');
        deviceCache = device;

        return deviceCache;
      });
}