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I'm interested in building an inventory tracking system and would like to know how many bluetooth beacons (BLE 4.0) can be tracked at one time. I only need their unique ID saying that they are there and transmitting. Since I don't need to connect to any of these bluetooth beacons (only need to see there ID) would it be possible to view a few hundred beacons at a time in a warehouse for instance and alert when a bluetooth beacon has left the area?
It depends on how you want to deploy this "wireless tracking" strategy. One way is what you described, using localized scanners to manage/track a much smaller group of addresses. I suggest you talked to some system integrators to design a viable system for your needs.