In-store GPS technology

A previous post addressed three technological approaches to in-store GPS technology.  They are:

• The use of high-pitched frequency
• Triangulation of an in-store wi-fi signal
• Bluetooth low-energy detectors (also called beacons) – with one-foot detection accuracy

This American Marketing Association post focuses on the third technology -- bluetooth enabled low-energy detectors or beacons. 
https://www.ama.org/publications/MarketingNews/Pages/beam-me-up-scotty.aspx