One Bluetooth operation broadcasts a general query to determine what other Bluetooth-enabled devices are in the vacinity.
Once I know that a particular device is in the vacinity and available for a connection, another Bluetooth operation allows me to initiate a connection.
Suppose I do not want to connect to a specific device at the moment; I just want to check its availability; but I don't care to know the availability of all the other Bluetooth devices in the vacinity. Obviously, I can do the general query and see whether the device care about is among those which respond. But is there a way to gain speed by limiting my search to the specific device of interest?