Ai-Thinker BU04 DW3000 UWB Positioning Module

Description

Ai-Thinker BU04 DW3000 UWB Positioning Module The Ai-Thinker BU04 DW3000 UWB Positioning Module is an advanced ultra-wideband (UWB) module engineered for precise indoor positioning and ranging applications. Built on Decawave’s DW3000 series chips and integrated with an STM32F103 microcontroller, the BU04 module delivers exceptional performance, achieving a positioning accuracy of up to 10 cm and data rates up to 6.8 Mbps. Its dual-antenna configuration, supporting both onboard and external IPEX antennas, ensures flexibility and enhanced performance across diverse environments, making it a robust solution for modern IoT applications. Features: Adopt SMD-34 package , compatible with DIP-16 package. Compliant with IEEE 802.15.4-2015 UWB standard. Compliant with IEEE802.15.4z (BPRF mode). Support dual antenna channels. Support channel 5 and channel 9. Simple integration, no need for RF secondary design. Support onboard antenna, compatible with IPEX external antenna. Integrated MAC function. Using RTLS infrastructure to extend communication range. Data rate supports 850 K bps, 6.8 Mbps. Supports two-way ranging and T DOA and PDOA positioning solutions. Provide precise positioning and data transmission. Positioning accuracy 10 cm. Supports high label density. Integrated HW AES 256. Support SPI interface. 20 configurable GPIOs. Integrated STM32F103 MCU. Programmable adjustable transmission power. Supports supply voltage from 2.5 V to 3.6 V. Specifications: Parameter Details Model BU04 Package SMD-34 (compatible with DIP-16) Size 35.5mm × 33.5mm × 3.4 mm (±0.2 mm) Antenna Type Onboard antenna Center Frequency CH5 (6489.5 MHz), CH9 (7987.2 MHz) Operating Temperature -40°C to 85°C Storage Environment -40°C to 125°C, < 90% RH Power Supply Range 2.5 V to 3.6 V (Typical: 3.3 V) Supply Current ≥ 500 mA Supported Interfaces SPI, UART, I2C Available IO Quantity 20 Built-in MCU STM32F103 Pin Configuration: No. Name Function Power Domain 1 GND Grounding GND 2 ST_NRST NRST; STM32 reset pin, pull low to be effective 3V3 3 PA1 STM32 PA1; ADC12_IN1 / TIM2_CH2 3V3 4 PA2 STM32 PA2; USART2_TX / ADC12_IN2 / TIM2_CH3 3V3 5 PA3 STM32 PA3; USART2_RX / ADC12_IN3 / TIM2_CH4 3V3 6 PB15 STM32 PB15; SPI2_MOSI / TIM1_CH3N 3V3 7 PB14 STM32 PB14; SPI2_MISO / USART3_RTS / TIM1_CH2N 3V3 8 PB13 STM32 PB13; SPI2_SCK / USART3_CTS / TIM1_CH1N 3V3 9 PB12 STM32 PB12; SPI2_NSS / I2C2_SMBA / USART3_CK / TIM1_BKIN 3V3 10 GND Grounding GND 11 WAKEUP WAKEUP / PB0; DW3000 chip WAKEUP is connected to STM32 PB0. Brings DW3000 from sleep/DEEPSLEEP to active mode 3V3 12 DW_RSTN RSTN / PA0; DW3000 reset pin connected to STM32 PA0. Active low. External pull-up not allowed. 3V3 13 SPI_CLK SPI_CLK / PA5; SPI communication clock from STM32 to DW3000 3V3 14 SPI_MOSI SPI_MOSI / PA7; SPI data input from STM32 to DW3000 3V3 15 SPI_MISO SPI_MISO / PA6; SPI data output from DW3000 to STM32 3V3 16 SPI_CSN SPICSn / PA4; SPI chip select. Also functions as wake-up for DW3000 3V3 17 IRQ GPIO8 / IRQ / PB5; Interrupt from DW3000 to STM32. Active high by default. Needs external pull-down to avoid false interrupts in sleep states 3V3 18 GPIO2 GPIO2 / TXLED; General purpose I/O. Can drive RX LED during receive mode VDD1 19 GPIO3 GPIO3 / TXLED; General purpose I/O. Can drive TX LED after transmission VDD1 20 GPIO5 GPIO5 / EXTTXE / SPIPOL; Acts as SPIPOL at startup. Can be configured as EXTTXE (External Transmit Enable) VDD1 21 GPIO6 GPIO6 / EXTRXE / SPIPHA; Acts as SPIPHA at startup. Can be configured as EXTRXE (External Receive Enable) VDD1 22 SYNC GPIO7 / SYNC / PB1; Used for external synchronization. Can be reconfigured as general I/O 3V3 23 VDD1 Power supply 2.5V ~ 3.6V; External source, ≥500mA current recommended VDD1 24 3V3 Power supply 2.5V ~ 3.6V; External source, ≥500mA current recommended 3V3 25 EXTON EXTON / PA8; External enable for external devices during wake-up. Remains active until sleep 3V3 26 PA9 STM32 PA9; USART1_TX / TIM1_CH2 3V3 27 PA10 STM32 PA10; USART1_RX / TIM1_CH3 3V3 28 PA11 STM32 PA11; USART1_CTS / CANRX / USBDM / TIM1_CH4 3V3 29 PA12 STM32 PA12; USART1_RTS / CANTX / USBDP / TIM1_ETR 3V3 30 SWDIO STM32 PA13; JTMS / SWDIO 3V3 31 SWCLK STM32 PA14; JTCK / SWCLK 3V3 32 PB6 STM32 PB6; IC21_SCL / TIM4_CH1 3V3 33 PB7 STM32 PB7; IC21_SDA / TIM4_CH2 3V3 34 3V3 Power supply 2.5V ~ 3.6V; External source, ≥500mA current recommended 3V3 Application: Precise indoor positioning and localization. Asset tracking in warehouses and logistics. Personnel tracking in hospitals and healthcare facilities. Underground positioning in mining operations. Smart home and building automation. Robotics and drone navigation. Package Include: 1x Ai-Thinker BU04 DW3000 UWB Positioning Module. Data Sheet: BU04

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