Ai-Thinker BU03 UWB Technology Indoor Positioning Module
The Ai-Thinker BU03 is an advanced Ultra-Wideband (UWB) module 🚀 designed by Ai-Thinker Co., Ltd. and based on the Decawave DW3000 series chip. The BU03 integrates an onboard ceramic antenna, RF circuit, and power management. It supports bidirectional ranging, TDOA, and PDOA positioning systems, achieving 10 cm accuracy 📏 and data rates up to 6.8 Mbps. Widely applicable in precision positioning, coal mine positioning, hospital personnel tracking, storage positioning, and various indoor positioning fields.
✨ Technical Advantages
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10 cm High Accuracy: Achieves industry-leading precision, ideal for tasks like robotics control, inventory verification, and critical personnel tracking that demand extremely high accuracy.
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Support for TDOA/PDOA: Beyond traditional Two-Way Ranging (TWR), the BU03 supports Time Difference of Arrival (TDOA) and Phase Difference of Arrival (PDOA), enabling high-density, scalable, and secure Real-Time Location Systems (RTLS).
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FiRa™ Compliance: The chip design adheres to the FiRa™ Consortium specifications, ensuring interoperability with the growing ecosystem of modern UWB devices, including consumer electronics.
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Dual-Channel Support: Operates on channels CH5 (6.4895 GHz) and CH9 (7.9872 GHz), which is crucial for maximizing performance in various global regulatory environments and improving immunity to interference.
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High Data Rate: With speeds up to 6.8 Mbps, the module can simultaneously handle precise location updates and secure data transfer.
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Power Efficiency: The DW3000 series is optimized for ultra-low-power operation, making the BU03 perfectly suited for battery-powered tags and smart wearables (sleep current $\text{< 1 µA}$).
📊 Main Parameters
| Model | BU03 |
| Package | SMD-24 |
| Size | 23.0 × 13.0 × 2.5 (±0.2) mm |
| Antenna | Onboard ceramic antenna |
| Center Frequency | CH5 (6489.5 MHz), CH9 (7987.2 MHz) |
| Operating Temperature | -40℃ ~ 85℃ |
| Storage Temperature | -40℃ ~ 125℃, < 90% RH |
| Power Supply | 2.5V ~ 3.6V (typical 3.3V), current ≥200mA |
| Interface | SPI |
| I/O | 9 |
📌 Additional Information
The BU03 module has a total of 24 pins, including pin schematic and functions. Products sealed in moisture-proof bags should be stored in a non-condensing atmosphere of <40℃ / 90%RH. The module has a Moisture Sensitivity Level (MSL) of level 3. After the vacuum bag is unsealed, it must be used within 168 hours at 25±5℃ / 60%RH; otherwise, baking is required before reuse.