Introduction
The BZGNSS BZ-121 FPV GPS Module is a compact and lightweight positioning device designed for RC FPV drones, racing drones, and fixed-wing aircraft. It offers precise and dependable location data, ensuring reliable navigation for your aerial vehicles. This module is compatible with a wide range of flight controllers, including F405 and F722, and supports dual protocols for versatile integration.
Key features include:
- Dual-Protocol Compatibility: Supports both NMEA and UBX protocols for broad device and flight controller compatibility.
- Accurate Positioning: Utilizes advanced GPS technology for precise and reliable location data.
- Simple Installation: Compact and lightweight design facilitates easy mounting on various RC aircraft.
- Quick Satellite Lock: Engineered for rapid acquisition of satellite signals, even in challenging environments.
- Additional Features: M10 Dual Protocol GPS system, ultra-compact and lightweight, supports BDS satellites, and includes a built-in battery to prevent issues from poor battery connections.
Setup and Installation
The BZGNSS BZ-121 GPS Module is designed for straightforward integration. Its PCB Pad interface allows for direct soldering to your flight controller. Ensure proper wiring according to your flight controller's documentation.
Important Note: For optimal performance and compatibility, your flight controller requires firmware version 4.29 or above. Firmware versions below 4.29 will utilize the NMEA protocol.
The module's compact size (12x16x4.5mm) and low weight (2.2g) allow for flexible mounting options on your RC airplane or FPV fixed-wing aircraft. Secure the module firmly to prevent movement during flight.
Figure 1: BZGNSS BZ-121 GPS Module showing its compact size (12x16x4.5mm) and weight (2.2g) in comparison to other models.
Figure 2: Close-up view of the U-blox M10050 GNSS Chip Group, highlighting the core technology for accurate positioning.
Figure 3: The ultrathin ceramic antenna, treated with an oil spraying process to prevent scratching and oxidation, ensuring consistent performance.
Operating Instructions
Once correctly installed and powered, the BZ-121 GPS module will begin searching for satellite signals. The PPS lamp (red indicator) will flash after achieving a 3D position lock, indicating successful satellite acquisition.
The module supports multiple global navigation satellite systems (GNSS) including GPS, GLONASS, BDS, GALILEO, SBAS, and QZSS. By default, it operates with GPS+GLONASS+BDS joint positioning for enhanced accuracy and reliability.
The output protocol can be configured to either NMEA or UBLOX, with a default output frequency of 10Hz (adjustable from 1Hz-10Hz). Refer to your flight controller's software configuration guide for specific settings related to GPS module integration and protocol selection.
Specifications
| Feature | Description |
|---|---|
| Chip | u-blox M10050 (Ten Generation Chip) |
| Pattern | GPS, GLONASS, BDS, GALILEO, SBAS, QZSS (Default: GPS+GLONASS+BDS joint positioning) |
| FLASH | Supported |
| Frequency | GPS L1, GLONASS L1, BDS L1, GALILEO L1, SBAS L1, QZSS L1 |
| Power | 5V |
| Size | 12x16x4.5mm |
| Interface | PCB Pad |
| Weight | 2.2g |
| Antenna | Ultrathin Ceramic Antenna (oil spraying process, prevent scratching and oxidation) |
| Receiving Channels | 72 search channels |
| Baud Rate | 115200dps |
| Output Protocol | NMEA / UBLOX (Dual protocol) |
| Output Frequency | 1Hz-10Hz. Default 10Hz |
| Speed Accuracy | 0.05m/s |
| Horizontal Positioning Accuracy | 2D ACC 1.5m (open air) |
| Receiving Sensitivity | Trace -162dBm / Capture -160dBm |
| Dynamic Characteristics - Altitude | 50000m |
| Dynamic Characteristics - Speed | 500m/s |
| Dynamic Characteristics - Acceleration | 4G |
| Operating Temperature | -40°C ~ +85°C |
| Storage Temperature | -40°C ~ +105°C |
| Indicator Light | PPS lamp - red lamp flashes after 3D positioning (does not work when not positioned) |
| Connectivity Technology | Serial Port |
Maintenance
The BZGNSS BZ-121 GPS Module is designed for durability and minimal maintenance. Keep the module clean and free from dust or debris. Avoid exposing it to extreme physical shock or moisture beyond its specified operating conditions. Regularly check all connections to ensure they are secure.
Troubleshooting
- No 3D Position Lock (PPS lamp not flashing): Ensure the module has a clear view of the sky. Verify all wiring connections to the flight controller are correct. Check your flight controller's firmware version and configuration settings for the GPS module.
- Inaccurate Positioning: Ensure the module is mounted away from potential sources of electromagnetic interference (e.g., motors, ESCs). Verify the module is securely attached and not vibrating excessively.
- Connectivity Issues: Double-check the serial port connections and baud rate settings in your flight controller software.
Product Video
Video 1: Overview of the M10 Mini GPS module, demonstrating its features and compact design. This video provides a general look at the M10 series, which includes the BZ-121.
Warranty and Support
For warranty information and technical support, please refer to the official SPEEDY BEE website or contact your retailer. Keep your proof of purchase for any warranty claims.
