returned in case there is no argument or the argument is not a valid
generate text that is not accurate or factually correct。体育直播对此有专业解读
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It's a simple rather heuristic approach. Because BLE uses randomised MAC and the OSSID are not stable, nor the UUID of the service announcements, you can't just scan for the bluetooth beacons. And, to make thinks even more dire, some like Meta, for instance, use proprietary Bluetooth services and UUIDs are not persistent, we can only rely on the communicated device names for now.