GNSS and Compass M9N-5883
1. Product Summary
1.1. Product Description
The Matek M9N-5883 is a compact and reliable GNSS + Compass module based on the u-blox NEO-M9N satellite receiver and QMC5883L magnetometer. It supports multi-constellation positioning (GPS, GLONASS, Galileo, and BeiDou) for high-precision global navigation and includes an integrated 25×25×4 mm ceramic patch antenna. Ideal for drones, robotics, and autonomous vehicles, the module provides both location and heading data through UART and I²C interfaces.
1.2. Product Features
- Equipped with u-blox NEO-M9N multi-GNSS receiver.
- Integrated QMC5883L magnetometer for accurate compass heading.
- Supports concurrent reception of GPS, GLONASS, Galileo, and BeiDou.
- High-sensitivity tracking up to -167 dBm.
- Patch antenna size: 25 × 25 × 4 mm (high gain, low noise).
- UART interface for GNSS (TX/RX) and I²C interface for compass (SDA/SCL).
- Supply voltage: 4.0 V – 5.5 V (typical 5 V).
- Current consumption: approx. 50 mA.
- Compact dimensions and lightweight for easy integration.
- Compatible with ArduPilot, PX4, and most flight controllers.
1.3. Applications
- UAVs / Drones: Navigation and heading sensing for autopilot systems.
- Robotics: Real-time global positioning and compass orientation.
- Mapping and Surveying: Multi-GNSS data for accurate geographic recording.
- IoT / Embedded Devices: Position tracking and direction detection.
2. Technical Specifications
Table 2-1. M9N-5883 GNSS + Compass Specifications
| Manufacturer | Matek Systems |
| Model | M9N-5883 |
| GNSS Chipset | u-blox NEO-M9N (GPS, GLONASS, Galileo, BeiDou) |
| Compass Sensor | QMC5883L 3-axis digital magnetometer |
| Interfaces | UART (TX/RX) for GNSS, I²C (SDA/SCL) for compass |
| Patch Antenna | 25 × 25 × 4 mm ceramic, integrated |
| GNSS Sensitivity | Tracking: –167 dBm, Acquisition: –160 dBm, Cold start: –148 dBm |
| Update Rate | Up to 25 Hz (configurable via u-center) |
| Default Baud Rate | 38400 bps |
| Power Supply | 4.0 – 5.5 V DC (nominal 5 V) |
| Current Consumption | ~50 mA typical |
| Operating Temperature | –20 °C ~ +80 °C |
| Board Dimensions | 32 × 32 × 10 mm |
| Weight | ≈ 14.5 g |
| Mounting Holes | 4 × M2.5 (corner layout) |
3. Electrical Characteristics
Table 3-1. Power and Signal Parameters
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | 4.0 | 5.0 | 5.5 | V |
| Operating Current | – | 50 | 60 | mA |
| UART Voltage Level | 3.3 | – | 5.0 | V |
| I²C Logic Level | 3.3 | – | 5.0 | V |
4. Mechanical Characteristics
Table 4-1. Physical and Mounting Details
| Dimensions (L × W × H) | 32 × 32 × 10 mm |
| Weight | ≈ 14.5 g |
| Connector Type | JST-GH 6-pin (UART + I²C) |
| Antenna | Integrated ceramic patch antenna (25 mm) |
| Mounting Holes | 4 × M2.5, 28 mm spacing |
NOTE: Mount away from motors, ESCs, and ferromagnetic materials to reduce interference with compass readings.
5. Integration and Applications
5.1. Integration Notes
- Connect UART TX/RX to flight controller GNSS port (3.3–5V tolerant).
- Connect I²C SDA/SCL to the flight controller’s external compass bus.
- Ensure clear sky view for optimal satellite reception.
- Perform compass calibration after installation.
- Verify firmware support for u-blox M9N and QMC5883L in your flight stack.
5.2. Typical Applications
- Drone and UAV autopilot navigation.
- FPV long-range positioning.
- Autonomous robotics heading and mapping.
- Marine and land vehicle navigation systems.
6. Environmental Conditions
Table 6-1. Environmental Ratings
| Operating Temperature | –20 °C ~ +80 °C |
| Storage Temperature | –40 °C ~ +85 °C |
| Humidity | 5 % ~ 95 %, non-condensing |
7. Precautions
- Keep module at least 10 cm away from power electronics and magnetic materials.
- Use twisted or shielded cables for I²C and UART to reduce EMI.
- Mount flat and with clear view of the sky for best GNSS signal reception.
- Perform both accelerometer and compass calibration before flight.
- Avoid running power cables or ESCs near the compass area.
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