What is the accuracy of Blueiot Bluetooth AoA technology?

Blueiot Bluetooth AoA technology can reach up to 0.1-meter accuracy, which is 10 times more precise than traditional low-precision Bluetooth systems.

Is Blueiot AoA backward compatible with older Bluetooth tags?

Yes, Blueiot locating anchors are backward compatible with all Bluetooth 4.0 or above tags and support high-precision services for both BLE AoA tags and LBS phones.

Bluetooth AoA Technology Explained: High-Accuracy Indoor Tracking |Blueiot

Typical Positioning
Accuracy

Max Anchor Deployment
Spacing

RF & Algorithm
R&D

Compatible Bluetooth
Devices

Three Generations of Indoor
Positioning Technology

Bluetooth AoA marks the third generation-the leap from "is it here?"
to precise, sub-meter, real-time coordinates.

1st Generation

Presence Detection

ExistenceDetection

Non-continuous position data that only confirms whether a tag is present in a zone.

Technologies

RFIDInfrared

2nd Generation

5–10m Accuracy

RSSI Low-Precision Positioning

Signal-strength estimation delivers inaccurate and unstable location data.

Technologies

Wi-FiBLEZigBee

3rd Generation

0.1–1m Accuracy

High-Precision Positioning

High capacity, precision, and stability for real-time indoor tracking at scale.

Technologies

Bluetooth AoAUWB

Working Principle: How Angle of
Arrival Locates a Tag

An array antenna inside each anchor captures the signal's angle of arrival, then the positioning engine turns those angles into precise coordinates.

Single-Anchor Positioning

2D Fix from one Anchor

The anchor measures the pitch and heading angle of the incoming Bluetooth signal. Combined with the known height difference between the tag and the anchor, it resolves the tag's 2D (X, Y) coordinates.

Multi-Anchor Positioning

3D Fix from Intersecting Angles

Pitch and heading angles from multiple anchors intersect in space. The engine triangulates these angles to calculate the tag's full 3D (X, Y, Z) coordinates with high precision.

Multi-Anchor Coverage for Large, Complex Spaces

Multiple anchors work together across corridors, rooms, warehouses, and outdoor spaces. Triangulation and data fusion improve accuracy and stability everywhere they're deployed.

System Architecture

From tags and anchors to the processing engine and application software, every layer is built to deliver real-time location data through an open API.

Bluetooth Tags & Anchor
High Precision T-Engine
Location Application Platform

Bluetooth AoA vs. Legacy
Indoor Positioning

How Angle of Arrival compares to Bluetooth RSSI and RFID across the metrics that matter.

SpecificationBluetooth AoABluetooth RSSIRFID

Positioning-SpecificYesNoNo

Typical Precision0.3–0.5m5–10mZone-level

Refresh RateHighLowMedium

CompatibilityPhones, Bracelets, Watches, Badges, IoT tagsTags need extra data-return functionProprietary Tags

Tag Power ConsumptionLowLowMedium (Active)

Anchor CostMediumLowMedium (Active)

Tag CostLowLowMedium (Active)

IoT Gateway CapabilityYesNoneNone

Deployment ComplexityMediumMediumLow

See Sub-meter
Accuracy for Yourself

Skeptical about the numbers? Order a Bluetooth AoA demo kit-anchors, tags, and a gateway-and validate 0.3m positioning in your own space, or talk with our team about a full real-time location system deployment.

Order a Demo Kit

Global@Blueiot.com