1. Uvod
The Witmotion WTGPS-02H is a low-power, high-precision Global Navigation Satellite System (GNSS) module designed for accurate positioning and orientation. It supports multi-satellite system concurrency, including BDS, GPS, GLONASS, Galileo, and QZSS, ensuring robust and reliable data acquisition across various environments.
This module features dual-antenna orientation, high sensitivity positioning, and integrated MEMS sensors to provide real-time 3-axis heading, tilt angle, and roll angle outputs. Its built-in Low Noise Amplifier (LNA) and Surface Acoustic Wave (SAW) filter enhance sensitivity and anti-interference performance, making it suitable for complex applications.
Typical applications include communication antennas, geological monitoring, precision vehicles, ship positioning, drones, smart agriculture, and wearable devices.
2. Specifikacije
2.1 Opći parametri
| Parametar | Vrijednost |
|---|---|
| GNSS modul | WTGPS-02H |
| Pokrivenost | širom svijeta |
| Dimenzije | 25*2.6*0.6 cm |
| Težina | 50g |
| Radna temperatura | -40°C ~ +85°C |
| Temperatura skladištenja | -40°C ~ +90°C |
| Antenna Type | Aktivno ili pasivno |
| Interface | Type-C, UART |
| Certifikacija | CE* |
2.2 GNSS Performance
| Parametar | Vrijednost |
|---|---|
| Frekvencije prijema | BDS: B1, B1C* | GPS: L1 | GLONASS: G1 | Galileo: E1 | QZSS: L1 |
| Default Constellation | BDS+GPS+GLONASS+Galileo+QZSS |
| Preciznost smjera | 0.2° (1m baseline) |
| Preciznost ugla nagiba | 0.3° |
| Roll Angle Accuracy | 0.3° |
| Vrijeme inicijalizacije | <60s |
| Preciznost horizontalnog pozicioniranja | 1.5mCEP |
| Vertical Positioning Accuracy | 3.5mCEP |
| 1 PPS Accuracy | ≤30ns@1σ |
| TTFF (AGNSS enabled) | Cold start: 12s, Warm start: 2s, Hot start: 1s |
| TTFF (AGNSS disabled) | Cold start: 26s, Warm start: 18s, Hot start: 1s |
| Sensitivity (Capture) | -148dBm |
| Sensitivity (Track) | -165dBm |
| Sensitivity (Recapture) | -160dBm |
2.3 Electrical & Dynamic Performance
| Parametar | Vrijednost |
|---|---|
| Napajanje antene | External power supply or module VDD_RF pin |
| Raspon napajanja | 3.1V-3.6V (Typical 3.3V) |
| I/O Voltage | Tipično 2.8V |
| Consumption (Normal mode @ 3.3V) | 89mA@capture, 89mA@track |
| Consumption (Power saving mode @ 3.3V) | 52uA@Backup mode |
| Dynamic Performance (Altitude) | 10000m |
| Dynamic Performance (Speed) | 500m/s |
| Dynamic Performance (Acceleration) | 4g |
| UART brzina prijenosa | 9600~921600bps (Default: 115200bps) |
| Protokol | NMEA0183 |
| Učestalost ažuriranja | Default 1Hz, up to 10Hz |
3. Postavljanje i instalacija
3.1 Napajanje
The WTGPS-02H module requires a power supply within the range of 3.1V to 3.6V, with a typical operating voltage of 3.3V. Ensure your power source provides stable voltage within this range. The I/O voltage je tipično 2.8V.
3.2 Antenska veza
The module supports both active and passive antennas and features an external antenna interface with dual antenna inputs for enhanced orientation capabilities. Connect your chosen GNSS antennas securely to the designated ports on the module. Proper antenna placement with a clear view of the sky is crucial for optimal performance.
3.3 Podatkovni interfejs
The module communicates via a Type-C interface and UART. The default UART baud rate is 115200bps, but it can be configured from 9600bps to 921600bps. Ensure your host system's UART settings match those of the module for proper data communication.
3.4 Development Resources
Comprehensive development kits are available, including a detailed manual, sample code, and PC software, to assist with integration and application development.
4. Uputstvo za upotrebu
4.1 Izlaz podataka
The WTGPS-02H module outputs positioning orientation data, 3-Axis Heading, Tilt Angle, and Roll Angle. The data is transmitted using the NMEA0183 protocol. The default update frequency is 1Hz, configurable up to 10Hz.
4.2 PC Software (QGNSS V1.8)
The module is compatible with the free and useful QGNSS V1.8 PC software. This software allows for real-time viewing of GNSS data, including signal levels, data dock information (longitude, latitude, altitude, speed, fix mode, quality indicator, time, etc.), a sky view of visible satellites, and an online map for visual positioning.
5. Savjeti za korisnike
- For best accuracy, especially for heading and tilt, ensure both antennas have an unobstructed view of the sky and are mounted rigidly relative to each other.
- Utilize the provided PC software (QGNSS V1.8) to monitor signal quality and satellite visibility during initial setup and troubleshooting.
- When integrating into custom systems, refer to the sample code provided in the development kit for guidance on parsing NMEA0183 data and configuring UART communication.
- Consider the power-saving mode (52uA@Backup mode) for battery-operated applications to extend device longevity.
6. Održavanje
The WTGPS-02H module is designed for robust operation. To ensure its longevity and optimal performance:
- Zaštita životne sredine: Avoid exposing the module to extreme moisture, corrosive substances, or temperatures outside its specified operating range (-40°C to +85°C).
- Fizičko rukovanje: Handle the module with care to prevent physical damage. Avoid dropping or subjecting it to strong vibrations.
- čišćenje: If necessary, gently clean the module with a dry, soft cloth. Do not use harsh chemicals or solvents.
- Ažuriranja firmvera: Check the official WitMotion webperiodično provjeravajte stranicu za sva dostupna ažuriranja firmvera koja mogu poboljšati performanse ili dodati nove funkcije.
7. Otkrivanje problema
7.1 No Data Output / Incorrect Readings
- Provjerite snagu: Ensure the module is receiving stable power within the 3.1V-3.6V range.
- Potvrdite veze: Confirm all antenna and UART connections are secure and correctly wired.
- Položaj antene: Ensure antennas have a clear, unobstructed view of the sky. Obstructions can significantly degrade signal quality.
- UART postavke: Double-check that your host system's UART baud rate (e.g., 115200bps default) and other settings match the module's configuration.
- Vrijeme inicijalizacije: Allow up to 60 seconds for the module to initialize and acquire a fix, especially during a cold start.
- Provjera softvera: Use the QGNSS V1.8 PC software to diagnose signal strength, satellite visibility, and raw NMEA data output.
7.2 Poor Accuracy / Unstable Readings
- Smetnje u okolini: The module has built-in anti-interference features, but strong electromagnetic interference (EMI) from nearby electronics can still affect performance. Try relocating the module or shielding it.
- Antenna Quality/Type: Ensure you are using appropriate GNSS antennas. For dual-antenna orientation, the quality and spacing of the antennas are critical.
- Dinamički uvjeti: In high-dynamic environments (e.g., rapid acceleration), temporary fluctuations in accuracy are normal. The module is rated for up to 4g acceleration and 500m/s speed.
8. Garancija i podrška
WitMotion provides lifetime technical support for the WTGPS-02H module. For any technical inquiries, troubleshooting assistance, or support regarding the product, please contact WitMotion Shenzhen. Co.,Ltd directly through their official channels.
Please refer to the official WitMotion webnajnovije kontakt informacije i detalje o garanciji potražite na web stranici ili u dokumentaciji o kupovini.
