Ai-Thinker BU04 Development Board is a dual-antenna UWB solution based on the DW3000 + STM32F103 MCU. It supports two-way ranging (TWR), TDOA, and PDOA positioning with 10 cm accuracy, making it ideal for robotics, indoor navigation, logistics, and smart IoT applications.
🌟 Key Features
| Feature | Description |
|---|---|
| High Accuracy | Positioning precision up to 10 cm |
| Dual Antenna | Onboard PCB antennas, compatible with IPEX external antennas |
| Standards | IEEE 802.15.4-2015 UWB, IEEE 802.15.4z (BPRF mode) |
| Data Rates | 850 Kbps / 6.8 Mbps |
| Built-in MCU | Integrated STM32F103 |
| Interfaces | SPI / UART / I2C + 20 GPIOs |
| Security | Hardware AES-256 encryption |
| Power Supply | USB Type-C / 3.3V / 5V (≥500mA) |
| Operating Temp. | -40°C ~ +85°C |
📐 Specifications
| Parameter | Value |
|---|---|
| Model | BU04-Kit |
| Package | DIP-40 / SMD-40 |
| Dimensions | 46 × 52 mm (±0.2 mm) |
| Frequency Channels | CH5 (6489.6 MHz), CH9 (7987.2 MHz) |
| Bandwidth | 499.2 MHz |
| Storage Temp. | -40°C ~ 125°C (<90% RH) |
| Power Consumption (typical) | TX @0.85 Mbps: 45–53 mA<br>TX @6.8 Mbps: 43–51 mA<br>RX @0.85 Mbps: 50–79 mA<br>RX @6.8 Mbps: 51–79 mA |
🔌 Interfaces & I/O
| Interface | Description |
|---|---|
| UART1/UART2 | Serial communication |
| SPI / I2C | Peripheral integration |
| USB Type-C | Power + data |
| GPIOs | 20 available |
| Boot Modes | Flash / System Memory / SRAM |
💡 Applications
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Indoor positioning & navigation
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Robotics and autonomous vehicles
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Smart warehouses & logistics tracking
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Hospital staff & asset management
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Mining and industrial safety monitoring
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Consumer electronics with UWB ranging