Hardware & Devices

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/* get the id of the first bluetooth device. */
  device_id = hci_get_route(NULL);
  if (device_id < 0) {
      perror("hci_get_route");
      return 0;
  }

  /* create a socket to the device */
  device_sock = hci_open_dev(device_id);
  if (device_sock < 0) {
      perror("hci_open_dev");
      return 0;
  }