1. Introduction and Overview
The WitMotion WTRTK-960 (UM960) is a high-performance BDS/GNSS full constellation high-precision positioning and orientation module, measuring 26x38mm. This module is built upon a new generation of RF baseband and high-precision algorithm integrated chip – GNSS SoC. It features a single antenna design for precise positioning.
The WTRTK-960 module is capable of simultaneously tracking full-frequency points across the entire system, including the Beidou three-sphere signal, to achieve on-chip RTK positioning. It incorporates Dual RTK engine technology and an adaptive recognition function for differential input RTCM format. An advanced built-in anti-interference unit ensures reliable and accurate positioning even in complex electromagnetic environments. This module is ideal for high-precision navigation and positioning applications such as unmanned aerial vehicles (drones), autonomous machines, precision agriculture, and intelligent driving systems.
2. Product Details and Features
The WTRTK-960 module is designed with several key features to ensure high performance and reliability:
- MMCX Interface: Provides low insertion loss and higher bandwidth for robust antenna connections.
- Farad Capacitors: Integrated to store power, preventing data loss during unexpected power outages.
- Serial Port Connection: A reserved serial port interface allows for flexible data communication.
- TYPE-C Interface: Offers plug-and-play functionality, making it easy to connect to a PC for sensor data monitoring and configuration.
- All-star Full-range High-precision Positioning: Delivers centimeter-level RTK differential positioning with strong anti-interference capabilities.
- Fast Satellite Search Performance: Achieves RTK mode startup in less than a minute, with a 20Hz refresh rate and convergence time of less than 10 seconds.
- Strong Anti-interference Performance: Equipped with an advanced anti-jamming unit to maintain accuracy in challenging electromagnetic environments.
- Multi-system Federation: High sensitivity with 1408 channels, supporting single systems like BDS/GPS/GLONASS/Galileo/QZSS, and any combination of multiple systems for enhanced global coverage.
3. Setup Instructions
3.1 Package Contents
Before starting, ensure all components are present:
- 1 x WTRTK-960 Module
- 1 x Type-C Cable
- 1 x Set of Pins
- 1 x Heat Dissipation Piece (20*20*6mm)
3.2 Physical Dimensions and Pinout
Refer to the diagrams below for the module's dimensions and pin assignments for proper integration.
| Pin No. | Pin Name | Pin Usage |
|---|---|---|
| 1 | PPS | Seconds pulse |
| 2 | VCC | The power supply must be connected to 5V |
| 3 | RX2 | Serial port 2 data input |
| 4 | TX2 | Serial port 2 data output |
| 5 | GND | Ground wire |
| 6 | EN | High level enable foot |
| 7 | PPS | Seconds pulse |
| 8 | VCC | The power supply must be connected to 5V |
| 9 | RXD | Serial port data input |
| 10 | TXD | Serial port data output |
| 11 | GND | Ground wire |
| 12 | EN | High level enable foot |
3.3 Connecting to PC
Use the provided Type-C cable to connect the module to your computer. The plug-and-play functionality allows for easy access to sensor data via PC software. Refer to the development kits for PC software, manuals, and protocol details.
4. Operating Instructions
4.1 RTK Principle
RTK (Real-Time Kinematic) is a differential positioning technique that utilizes GPS. A ground base station receives satellite positioning data and calculates the difference between the GPS positioning and the real position. This error is then transmitted via GPRS to the mobile station (your WTRTK-960 module), which uses it to correct its own positioning data, resulting in highly accurate, centimeter-level results.
4.2 Achieving Centimeter-level Positioning
The WTRTK-960 module provides high-precision positioning with horizontal accuracy of 0.8cm + 1ppm and elevation accuracy of 1.5cm + 1ppm. RTK accuracy is influenced by the distance between the base station and the mobile station. For every 1km increase in distance, the error increases by 1cm.
4.3 Fast Satellite Acquisition
The module is designed for rapid satellite acquisition and tracking. It can enter RTK mode in less than a minute, offering a 20Hz refresh rate and quickly reducing errors. It can switch modes almost instantly, typically within 10 seconds.
4.4 Monitoring and Tracking
The module can display surrounding map data, current latitude, longitude, altitude, speed, positioning type, and UTC time. Dedicated PC software (UPrecise) can be used to visualize satellite tracking performance across various constellations (BDS, GPS, GLO, GAL).
5. Maintenance
To ensure optimal performance and longevity of your WTRTK-960 module, follow these general maintenance guidelines:
- Keep Clean: Regularly clean the module and its connectors to prevent dust and debris accumulation. Use a soft, dry cloth.
- Proper Cooling: Ensure the included heat dissipation piece is correctly installed and that the module has adequate airflow, especially during extended operation, to prevent overheating.
- Secure Connections: Periodically check all pin and cable connections to ensure they are secure and free from corrosion.
- Environmental Protection: Operate and store the module within the specified temperature and humidity ranges to avoid damage. Protect it from moisture and extreme temperatures.
6. Troubleshooting
If you encounter issues with your WTRTK-960 module, consider the following:
- No Power: Verify that the 5V power supply is correctly connected to the VCC pins (Pin 2 or Pin 8) and that the power source is active.
- No Data Output: Check serial port connections (RXD, TXD, RX2, TX2) and ensure the baud rate settings on your host device match the module's default (115200bps) or configured rate. Confirm the Type-C cable is functional and drivers are installed if necessary for PC connection.
- Poor Positioning Accuracy: Ensure the antenna is properly connected to the MMCX interface and has a clear view of the sky. Verify that the base station is transmitting differential data correctly and that the module is receiving it. Check for strong electromagnetic interference in the operating environment.
- Module Not Responding: Try power cycling the module. If the issue persists, ensure all pins are correctly wired according to the pinout diagram.
For more advanced troubleshooting, refer to the detailed protocol documentation available in the development kits.
7. Specifications (WTRTK-960)
The following table outlines the key specifications for the WTRTK-960 module:
| Attribute | Specification |
|---|---|
| Model | UM960 |
| Chip | UM960 |
| Antenna | Single-antenna positioning |
| Data Update Rate | 20Hz positioning |
| Signal Reception | BDS B1I, B2I, B3I, GPS L1C/A, L2P(Y), L5, GLONASS G1, G2, Galileo E1, E5a, E5b, QZSS L1C/A, L2C, L5, NavIC L5, SBAS L1C/A |
| Cold-start TTFF | <=30s |
| Hot-start TTFF | <=5s |
| Positioning Accuracy (Single-point) | Horizontal 1.5M, Elevation 2.5M |
| Positioning Accuracy (Differential) | Horizontal 0.8M+1ppm, Elevation 1.5M+1ppm |
| Positioning Accuracy (RTK) | Horizontal 0.8cm+1ppm, Elevation 1.5cm+1ppm |
| Orientation Accuracy | 0.1 degree/1m baseline |
| Temporal Precision | 20ns |
| Measurement Accuracy | 0.03m/s |
| Serial Port Characteristics | Baud rate range: 4800 bps - 921600 bps, Default 115200bps, 8 bits of data, no checksums, 1 stop bit |
| Protocol | NMEA0183 |
| Main Supply | 5V |
| BD Typical Power Consumption | 158mA & 5V |
| Operating Temperature | -40~85°C |
| Storage Temperature | -45~125°C |
| Size | 26.0 x 38 x 7.6mm |
8. User Tips
- Always ensure a clear line of sight to the sky for optimal satellite signal reception.
- When connecting to a PC, ensure the correct drivers for the Type-C interface are installed for seamless data transfer.
- For critical applications, consider using external antennas with appropriate impedance matching for improved signal quality.
- Regularly check for firmware updates from WitMotion to ensure the best performance and access to new features.
9. Frequently Asked Questions (FAQ)
- Q1. Can I have a sample order?
- A: Yes, we welcome sample orders to test and check quality.
- Q2. What about the lead time?
- A: Samples often arrive within 3-5 days.
- Q3. Do you have any MOQ (minimum order quantity) limit?
- A: Low MOQ, 1pc for sample checking is available.
- Q4. How do you ship the goods and how long does it take to arrive?
- A: We often ship by DHL, UPS, FedEx or TNT. It usually takes 3-5 days to arrive. Airline and sea shipping are also optional.
- Q5. How to proceed an order?
- A: Initially, let us know your requirements or application. We then quote according to your requirements or our suggestions. Thirdly, customers confirm the samples and place a deposit for the formal order. Finally, we arrange the production.
- Q6. Is it acceptable to print my logo on the product?
- A: Yes. Please inform us formally before production and confirm the design based on our sample.
- Q7: Do you offer a guarantee for the products?
- A: Yes, we offer a one-year warranty for our products.
- Q8: How to deal with flaws?
- A: Our products are produced under a strict quality control system, and the pass rate is often maintained over 99.8%.
10. Warranty and Support
10.1 Warranty
The WTRTK-960 module comes with a one-year warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use. Please retain your proof of purchase for warranty claims.
10.2 Technical Support
For technical assistance, inquiries, or support, please contact WitMotion directly:
- Whatsapp/Tel/Wechat: +8619902906050
- Web: http://www.thanksbuyer.com
- Address: Room 303 Building 2, Youpin Cultural and Creative Park, Zhangkeng, Minzhi Street, Longhua District, 518131, Shenzhen, China (Mainland)
Our support team is available to help with any questions regarding setup, operation, or troubleshooting of your module.
