Ai Thinker BU04-Kit Ultra-Wideband (UWB) Development Board

The BU04-Kit is a powerful dual-antenna UWB Ultra-Wideband development board by Ai-Thinker, built around the BU04 module, which integrates a DW3000 chip and an STM32F103 MCU. With support for dual onboard or IPEX antennas, it enables advanced positioning applications like TDOA, PDOA, and two-way ranging with up to 10 cm accuracy. Supporting IEEE 802.15.4-2015 and 802.15.4z (BPRF mode), the BU04-Kit delivers high-speed data rates of up to 6.8 Mbps, making UWB Development Board ideal for precision applications in industrial, healthcare, mining, and indoor navigation. Its compact SMD-40 form factor and SPI interface ensure seamless integration and enhanced flexibility. Features: IEEE 802.15.4-2015 and 802.15.4z (BPRF) compliant Dual antenna support (onboard PCB and IPEX) High positioning accuracy up to 10 cm Supports Two-Way Ranging, TDOA, and PDOA Integrated STM32F103 MCU with 20 GPIOs High-speed data rate up to 6.8 Mbps Package Includes: 1 x Ai Thinker BU04-Kit Ultra-Wideband (UWB) Development Board

Specifications

Data rate	850 Kbps to 6.8 Mbps
Item Type:	UWB Development Board
Model No. / Name:	BU04
Data Rate:	850 Kbps / 6.8 Mbps
Positioning accuracy	Up to 10 cm
GPIO	20 GPIO available
Antenna Type:	Dual PCB onboard antennas + IPEX support
Power Supply Voltage (V)	USB Type-C / 3.3V or 5V pin
Current Drawn	Max 500mA
Operating Temperature (°C):	-40 to 85
Storage Temperature (°C):	-40 to 125, <90% RH
Length (mm):	79
Width (mm):	46
Weight (g):	17
Shipping Weight	0.025 kg
Shipping Dimensions	9 × 9 × 5 cm