Broadcast
A name tag, shouted into the air.
The beacon does not open a conversation. It repeats a tiny identifier for anyone nearby who is listening.
BLE beacons are tiny radio lighthouses.
They broadcast a small identity. Your phone listens. An app decides what it means.
Drag the phone toward the beacon. When you enter a zone, the exhibit wakes up.
Signal—
ZoneFar
Decide
The app adds the meaning.
Beacon → identifier → app logic → maybe a notification. The radio packet itself never “sends the alert.”
Proximity
Zones, not rulers.
Signal strength hints at distance. Walls, bodies, and pockets wobble the reading—so design for immediate, near, and far.
Decision guide
When beacons earn their place.
Use them when “something is nearby” is enough—and the phone already has Bluetooth permission and an app that understands the ID.
Good for
- Exhibit momentsReveal content when a visitor enters a gallery zone
- Wayfinding landmarksTreat known beacons as coarse indoor waypoints
- Asset presenceNotice tagged gear is in a monitored area
- Store or venue entryTrigger a welcome flow near a doorway or kiosk
Weak fit
- Centimeter trackingRSSI wobbles too much for precise position
- No-app audiencesBackground listening needs OS rules and consent
- Through dense wallsBodies, metal, and pockets distort the signal
- Guaranteed push alertsThe beacon never forces a notification by itself
Pros
- Cheap hardware, long battery life
- Works on phones people already carry
- Simple mental model: broadcast → listen → decide
- Easy to place many landmarks across a venue
Cons
- Distance is a zone guess, not a ruler
- Needs Bluetooth on + app / platform support
- Crowded 2.4 GHz spectrum adds noise
- Maintenance: batteries, mapping IDs to meaning
Against alternatives
ApproachBest whenVs BLE
UWBYou need accurate ranging between devicesMore precise, higher cost, fewer phones ready
Wi‑Fi RTT / indoor Wi‑FiThe building already has managed access pointsInfrastructure-heavy; still not exhibit-simple
NFC / QRThe person can intentionally tap or scanClear intent, no continuous proximity awareness
Vision / audio syncThe room content itself is the signalRicher context, heavier compute and privacy surface
GPS / outdoor GNSSYou’re outside with sky viewFails indoors; wrong tool for galleries
Rule of thumb: pick BLE when low-cost proximity zones beat precision—and you control the app that turns an ID into an experience.