We did much work with electronic shelf labels (ESL). See the link below for much more. Quite natural to connect them to the beacon idea as part of retail infrastructure. Combines visual and data transmission.. In the RFID Journal:
Panasonic Adds Bluetooth Beacons to Electronic Shelf Labels
The Powershelf system, which uses inductive coupling to transmit power and data to wireless electronic labels and sensors, now includes beacons to enable stores to provide data to customers on their phone apps. ... "
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