Widget idea: BLE Battery Service

ok. Cleared out all my files, went back to basics.
added an image and an info file to storage. then added a ibeacon.boot.js file to storage with

var myiBeacon = require("ble_ibeacon").get({
  uuid : [0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx, 0xxx], [#myuuid](http://forum.espruino.com/sear­ch/?q=%23myuuid)
  rssi : -74
});
var _setAdvertising = NRF.setAdvertising;
NRF.setAdvertising = function(a,b) {
  if (Array.isArray(typeof a)) a = [a,myiBeacon];
  _setAdvertising(a,b);
};
function advertiseBeacon() {
  NRF.setAdvertising(Bangle.bleAdvert);
}
if (!Bangle.bleAdvert) Bangle.bleAdvert = {};
setInterval(advertiseBeacon, 60 * 1000);
advertiseBeacon();

did a load() and it disconnected from bangle2 with prompt not detected, upload failed, trying to recover. And it reconnected. At that point I checked the file was saved - it was and I did load() and then disconnected - and all seems to work. It is picked up by Home Assistant Espresense as an ibeacon.

I guess I should now try t add widget bootgattbat and see if they all work together. First... a backup