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BlueIOT Technology Co., Ltd.

Bluetooth AoA vs. UWB

Both technologies achieve sub-meter indoor positioning, but they work differently—and that shapes their cost, compatible hardware, and best-fit use cases

Bluetooth AoA

Pinpoints Location Using Signal Angle

BLE 5.1 anchors read phase difference across an antenna array for Angle of Arrival, no time-of-flight. Multiple anchors triangulate into X, Y, Z coordinates. Any BLE 4.0+ device works, no dedicated hardware.

UWB

Pinpoints Location Using Pulse Timing

UWB anchors measure time-of-flight of nanosecond pulses for Time Difference of Arrival, hitting 10 cm accuracy. Multiple anchors trilaterate into X, Y, Z coordinates. Requires dedicated UWB tags and anchors.

Bluetooth AoA vs. UWB,
side by side

The full technical breakdown across protocol, accuracy, power, and cost.

Category Bluetooth AoA UWB(Ultra-Wideband)
Radio standard Bluetooth 5.1 anchors + any BLE tag UWB anchors + dedicated UWB tags
Typical Accuracy 0.3–0.5m 0.1–0.3m Advantage
What can be tracked Phones, wristbands, watches, beacons, asset labels—any BLE device Advantage Dedicated UWB tags only
Battery life 1–3 years (coin cell) Advantage Weeks to months
Anchor cost Moderate Advantage Higher
Tag cost Low—large third-party market Advantage Higher — specialised hardware
Doubles as IoT gateway Yes—reads temperature, humidity, door sensors over Bluetooth Advantage No
Best for Healthcare, warehousing, retail, hospitality, factories, public venues Precision robotics, industrial safety, automotive assembly

Match the technology to the requirement

Both technologies are production-proven. The right choice comes down to your accuracy target, tag ecosystem, infrastructure budget, and site conditions.

Choose When

Bluetooth AoA (Blueiot)

  • You want to track existing devices Any BLE device—phones, off-the-shelf wristbands, or standard beacons—works without buying new tags.
  • You need to track a lot of people or assets Low tag cost and 1–3 year battery life make large deployments across hospitals, warehouses, and campuses practical.
  • You want one system for location and sensors Each Blueiot anchor also reads nearby Bluetooth sensors—temperature, humidity, door contacts—over the same cables.
  • Half-metre accuracy is enough Room, zone, and aisle-level tracking covers the vast majority of real-world use cases.
Choose When

UWB

  • You need centimetre-level precision Robotic vehicles, automated tool dispensers, and industrial safety applications that need accuracy under 10 cm.
  • Your site has heavy wireless congestion UWB operates on a different frequency band, away from Wi-Fi and Bluetooth traffic in busy facilities.
  • You are building a consumer proximity feature iPhone 11+ and recent Android phones have a UWB chip built in, enabling hands-free directional finding.

Need UWB? Blueiot's parent company Tsingoal specialises in industrial-grade UWB RTLS with 10cm accuracy — the two platforms share the same ecosystem and support network.

Visit tsingoal.com
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