Ai-Thinker BU04 Dual-Antenna UWB Positioning Module – DW3000 + STM32F103

Product Description

The BU04 UWB module is a high-precision dual-antenna ultra-wideband (UWB) positioning module developed by Shenzhen Anxinke Technology Co., Ltd. It is based on Decawave’s DW3000 series UWB chipset and integrates an STM32F103 microcontroller, providing a compact and powerful solution for accurate indoor and industrial positioning systems.

The BU04 supports dual onboard antennas as well as dual external IPEX antennas, offering flexible antenna configurations without the need for RF secondary design. It is compliant with IEEE 802.15.4-2015 UWB and IEEE 802.15.4z (BPRF mode) standards and supports channel 5 and channel 9 operation.

Designed for Two-Way Ranging (TWR), TDOA, and PDOA positioning systems, the BU04 delivers positioning accuracy up to 10 cm with data rates of up to 6.8 Mbps. Its integrated MAC, hardware AES-256 encryption, adjustable transmission power, and RTLS support make it suitable for high-density tag environments and large-scale positioning deployments.

The module is widely used in indoor positioning, warehouse asset tracking, hospital personnel positioning, underground coal mine positioning, and other precision location applications.

Key Features

• Dual-antenna ultra-wideband (UWB) positioning module

• Based on Decawave DW3000 series UWB chip

• Integrated STM32F103 MCU

• SMD-34 package, compatible with DIP-16 footprint

• Compliant with IEEE 802.15.4-2015 UWB standard

• Compliant with IEEE 802.15.4z (BPRF mode)

• Supports dual antenna channels

• Supports channel 5 and channel 9

• Supports onboard antenna and IPEX external antenna

• No RF secondary design required

• Integrated MAC function

• Supports Two-Way Ranging (TWR)

• Supports TDOA and PDOA positioning

• Positioning accuracy up to 10 cm

• Data rates: 850 Kbps and 6.8 Mbps

• Supports high tag density deployments

• Integrated AES-256 hardware encryption

• SPI communication interface

• 20 configurable GPIOs

• Programmable adjustable transmission power

• Supports RTLS infrastructure for extended range

Typical Applications

• Indoor positioning systems

• Warehouse and logistics tracking

• Hospital staff and asset positioning

• Underground positioning (coal mines, tunnels)

• Industrial safety and automation

• Personnel and object tracking solutions

Download the datasheet here

Package Includes

• 1 × BU04  UWB Module(Does not include the Antenna)

Important Product Disclaimer

Please note that the product information provided on our website may not be entirely accurate as it is collected from various sources on the web. While we strive to provide the most up-to-date information possible, we cannot guarantee its accuracy. We recommend that you always read the product labels, warnings, and directions before using any product. Product images are shown for illustrative purposes only and may differ from the actual product.

Note

Images are for representation only. The actual product may slightly vary in appearance.

Related UWB Modules

Compare this product with related UWB modules and development boards available from Robosap.

• Ai-Thinker BU04-Kit UWB development board
• Ai-Thinker BU03 DW3000 UWB module
• Radar and UWB modules category

Downloads and Documentation

Use these manufacturer or reference documents to verify specifications, pin details, firmware support and integration requirements before designing your system.

• Ai-Thinker BU04 product page
• BU04 specification PDF
• Ai-Thinker UWB documentation hub

Documents may be updated by the manufacturer. Always confirm critical electrical and mechanical details with the latest official documentation before production use.

Product Disclaimer

Images are for representation only. Actual product appearance, PCB marking, connector style, antenna layout, colour, pin-header configuration or included accessories may vary depending on the available production batch. Product description information listed here is collected from different internet sources, manufacturer pages, datasheets and reference documents, and may contain mistakes or become outdated. Always verify critical electrical, mechanical, firmware and safety details from the latest official manufacturer documentation before design, production or field installation.

Radar, mmWave and UWB sensing performance depends on firmware, configuration, power supply quality, installation height, antenna direction, enclosure material, target size, target movement, reflections, interference, line-of-sight and surrounding environment. Distance, angle, accuracy and current values are reference values unless explicitly guaranteed by the latest manufacturer datasheet for the exact supplied revision.