function initPresenceScanner() {
  // Manages presence scanner
  const { status, frequency, timer } = this.presenceScanner;
  if (timer) {
    logger.info(`Bluetooth configuration: stopping presence scanner`);
    clearInterval(timer);
    this.presenceScanner.timer = undefined;
  }
  if (status === PRESENCE_STATUS.ENABLED && this.ready) {
    logger.info(`Bluetooth configuration: starting presence scanner`);
    this.scanPresence();
    this.presenceScanner.timer = setInterval(this.scanPresence.bind(this), frequency);
  }
}
@description Init scanner presence.
@example
this.initPresenceScanner();