The Ebyte EWM551-3G9 series is an industrial UWB wireless ranging and positioning module based on Decawave/Qorvo DW1000 (3.5GHz-6.5GHz / CH2), delivering sub-10cm ranging accuracy, up to 500m distance, SPI raw transceiver or UART AT command interface, and companion Type-C evaluation kits for AGVs, asset tracking, and smart factory personnel safety.
Key Features & Advantages
- Centimeter-Level High-Precision UWB Ranging (<10cm Accuracy): Built on the Decawave/Qorvo DW1000 ultra-wideband transceiver, utilizing Two-Way Ranging (TWR) and Time Difference of Arrival (TDOA) algorithms with nanosecond timestamp precision to achieve accurate <10cm spatial ranging.
- Long-Distance Ranging up to 500 Meters: Engineered with optimized RF matching and up to 13dBm output power on CH2 (3993.6MHz, 499.2MHz bandwidth), achieving robust line-of-sight wireless ranging from 50m up to 500m.
- Dual Architecture Options: SPI Transceiver & UART AT Command Firmware: Choose the EWM551-3G9M01SC (SPI, 6.8Mbps high-speed transceiver) for custom protocol stacks and TDOA multi-anchor architectures, or choose EWM551-3G9T13SC/SX (UART, integrated MCU with AT commands) for plug-and-play two-way ranging and 1-to-many tag following.
- Compact SMD Form Factor & Plug-and-Play Type-C Test Kits: Offered in surface-mount packages with onboard ceramic antenna or IPEX-1 connector, supported by dedicated EWT551 evaluation boards with Type-C USB interfaces for rapid PC debugging and real-time distance visualization.
Core Specifications
| Parameter | Specification / Value |
|---|---|
| UWB Core Transceiver | Qorvo / Decawave DW1000 (IEEE 802.15.4-2011 UWB Compliant) |
| Operating Frequency Bands | 3244 ~ 6999 MHz (CH1 ~ CH4/CH5) | Default CH2: 3743.6 ~ 4243.6 MHz (Center 3993.6 MHz) |
| Ranging Precision & Error | Less than 10 cm (M01SC) / 10 ~ 30 cm (T13SC/SX) |
| Maximum Ranging Distance | M01SC: 50 m | T13SX: 400 m | T13SC: 500 m (Clear Line-of-Sight) |
| Communication Interfaces | M01SC: High-Speed SPI (Up to 6.8 Mbps) | T13SC/SX: Standard UART (115200 bps, AT Commands) |
| Positioning & Ranging Algorithms | Two-Way Ranging (TWR), Time Difference of Arrival (TDOA), 1-to-Many Two-Way Ranging |
| Supply Voltage Range | DC 2.8V ~ 3.6V (3.3V Typical) |
| Antenna Options | Onboard High-Efficiency Ceramic Patch Antenna / IPEX-1 Generation Receptacle |
| Operating Temperature | -40 deg C to +85 deg C (Industrial Grade) |
| Package Dimensions & Weight | M01SC: 13*23*3.0mm (1.4g) | T13SX: 20*26mm (2.6g) | T13SC: 20*35mm (3.8g) |
Product Selection Guide
Notice for Selection: Choose EWM551-3G9M01SC (SPI interface) for raw hardware access in TDOA/TWR custom positioning systems; choose EWM551-3G9T13SC (Ceramic Antenna) or EWM551-3G9T13SX (IPEX connector) for plug-and-play UART AT command two-way ranging up to 500m; or select the matching EWT551 Type-C test kit for turnkey PC evaluation and firmware debugging.
| Model SKU | Product Type | Interface | Antenna Type | Max Range | Accuracy | Dimensions |
|---|---|---|---|---|---|---|
| EWM551-3G9M01SC | UWB Hardware Module | SPI (Up to 6.8Mbps) | Ceramic Antenna | 50 m | < 10 cm | 13 * 23 * 3.0 mm |
| EWM551-3G9T13SC | UWB Module (MCU+AT) | UART (115200bps) | Ceramic Antenna | 500 m | 10 ~ 30 cm | 20 * 35 mm |
| EWM551-3G9T13SX | UWB Module (MCU+AT) | UART (115200bps) | IPEX-1 Connector | 400 m | 10 ~ 30 cm | 20 * 26 mm |
| EWM551-3G9T13SX + TX3700-FPC-2510 | Module + Antenna Bundle | UART (115200bps) | TX3700-FPC-2510 (IPEX) | 400 m | 10 ~ 30 cm | 20 * 26 mm (Module) |
| EWT551-3G9M01SC | Evaluation Kit for M01SC | Type-C USB | Onboard Module Antenna | 50 m | < 10 cm | 70 * 38 mm |
| EWT551-3G9T13SC | Evaluation Kit for T13SC | Type-C USB | Onboard Module Antenna | 500 m | 10 ~ 30 cm | 81 * 38 mm |
Industrial Installation & Wiring
The EWM551 series modules are manufactured in compact surface-mount SMD packages with standard stamp-hole solder pads. Supply clean DC 2.8V ~ 3.6V (3.3V typical) across VCC and GND with decoupling capacitors placed immediately adjacent to the VCC pins. For the SPI variant (M01SC), connect SPICSn, SPICK, SPIMOSI, SPIMISO, and IRQ directly to the host microcontroller. For the UART variants (T13SC/SX), connect TX, RX, and nRST pins to your MCU or USB-to-UART bridge, operating at default 115200bps (8, N, 1). For rapid evaluation, the EWT551 test kits provide plug-and-play Type-C USB interfaces, onboard power regulation, and LED diagnostic indicators for direct connection to PC software.
Practical Application Scenarios
1. Automated Guided Vehicles (AGV) & Forklift Anti-Collision Systems
In smart logistics warehouses and automated manufacturing floors, multiple AGVs and manned forklifts navigate high-speed transport aisles. Integrating EWM551-3G9T13SC modules onto AGVs and mobile machinery enables real-time 1-to-many bidirectional distance measurement up to 500m, triggering automatic deceleration and emergency braking interlocks when vehicles approach within critical safety thresholds.
2. Smart Factory & High-Risk Industrial Personnel Safety Tracking
In chemical refineries, underground mining tunnels, and construction sites, monitoring worker presence in hazardous zones is paramount. Equipping workers with wearable UWB tags built around the EWM551 series enables real-time 3D spatial tracking against fixed UWB anchors with sub-10cm precision, triggering geofencing alarms when personnel enter hazardous proximity zones.
3. Autonomous Following Robots & Smart Luggage / Cart Tracking
Service robots, automated hospital supply carts, and smart airport trolleys require continuous distance and angle tracking relative to the user. Utilizing the UART AT command set on the EWM551-3G9T13SX module allows robotics controllers to maintain a stable, jitter-free following distance with responsive real-time distance updates.
4. Warehouse Asset Tracking & Pallet Real-Time Locating Systems (RTLS)
Tracking high-value tools, inventory pallets, and test equipment across large industrial hangars requires precise indoor coordinates where GPS/GNSS signals cannot penetrate. Deploying fixed UWB anchor networks with EWM551 modules achieves accurate real-time inventory heatmaps and asset flow analytics.
FAQ Section
1. What is the fundamental difference between the M01SC and T13SC/SX modules?
EWM551-3G9M01SC is a pure hardware RF transceiver module that exposes the native SPI interface of the DW1000 chip, requiring the host MCU to run the Decawave driver and positioning stack. In contrast, EWM551-3G9T13SC/SX integrates an onboard MCU with pre-flashed firmware, providing standard UART AT commands for direct, plug-and-play distance output without complex driver development.
2. Can multiple UWB tags be measured by a single base station simultaneously?
Yes. The EWM551-3G9T13SC/SX UART series supports 1-to-many two-way ranging mode. A single central anchor can cyclically poll and measure distances to multiple mobile tags in time-division sequence, outputting structured distance data over serial port.
3. What is the recommended antenna clearance when designing host PCBs?
For modules with onboard ceramic antennas (M01SC and T13SC), the antenna region must overhang the edge of the host motherboard or sit over a designated ground-keepout clearance area (no copper, traces, or metallic components on all PCB layers) to ensure optimal 360-degree omnidirectional radiation patterns.
4. How do I evaluate the modules using a PC without custom hardware?
Use the matching evaluation test kits (EWT551-3G9M01SC or EWT551-3G9T13SC). Simply connect the test kit to your computer via a standard Type-C USB cable, open Ebyte's graphical host evaluation software or a serial terminal at 115200bps, and immediately begin reading live distance telemetry and configuring AT parameters.
