File transfer over BLE to smart phone or other devices

This is what the IDE Is using to connect to the bangle and download a file. Maybe the app will have to talk to bangle a bit, to respond with a connection request after the bangle initiates ??. Im not sure if it matters who initiates the connection, need further advice. Essentially its just reading a file and everything that it prints out, is the file contents, which gets sent over the serial/Uart.

Espruino.Core.Utils.executeStatement(`(f­unction(filename) {
  var f = require("Storage").open(filename,"r");
  var d = f.read(INSERT_CHUNK_SIZE_HERE);
  while (d!==undefined) {
    console.log(btoa(d));
    d = f.read(INSERT_CHUNK_SIZE_HERE);
  }
})(INSERT_FILE_NAME_HERE);`