We have a new range of Kaipule Bluetooth sensors that while intended for OEM alarm systems are stand-alone as regards Bluetooth. They are sensor beacons, sending out Bluetooth LE advertising when events occur.
Beacons can be used to detect if things or people are in a zone by either putting beacons on the moving things or having the beacons static in a zone.
For the beacons on things/people approach, a gateway or other scanning device looks for beacons in the vicinity and triggers actions. For the static beacons case, an app on peoples’ phone can detect beacon(s) in a zone and trigger actions.
We have some new beacons in stock that now provide a third way of detecting proximity. They use IR and PIR to detect the proximity of any item coming within range. For IR that’s <50cm and for PIR < 5m. These beacons transmit the current state via Bluetooth that can be picked up by an app or gateway.