Periodic Search for Devices
bluetooth can be configured to automatically search for devices on a regular basis (bluetooth configuration panel ] discovery tab).
one of the advantages of bluetooth is the mobility that the wireless connections allow.
however, mobility means that devices may move in or out of connection range during the time between the automatic updates performed by bluetooth. to be certain that the displayed list of devices in the neighborhood is current, or if automatic periodic inquiry is not enabled, force an update of the device list using the technique described in search for devices, above.
some devices within connection range may not show up in the list of devices found because:
1.your device is configured to report only specific types or classes of devices (bluetooth configuration panel ] discovery tab, on your device).
2.the unlisted device is configured to be non-discoverable (bluetooth configuration panel ] accessibility tab, on the un-listed device).