SEQURE M10 Series GPS Module User Manual

1. Product Overview

The SEQURE M10 Series GPS modules (M10-12, M10-18, M10-25Q) are compact, high-performance positioning systems designed for various drone applications, including fixed-wing and racing drones. These modules utilize a 10th generation M10 chip for fast and accurate satellite positioning with low power consumption. They feature a high-quality ceramic antenna for effective signal reception and support flexible installation options.

The M10-25Q model further enhances functionality by integrating a QMC5883L compass, making it suitable for a wider range of applications requiring heading information.

Figure 1: SEQURE M10 Series GPS Modules (M10-25Q, M10-18, M10-12)

2. Package Contents

• GPS Module × 1 (Specific model: M10-12, M10-18, or M10-25Q)
• Connection Cable × 1

3. Specifications

The following table details the specifications for each model in the SEQURE M10 GPS series:

Figure 2: Physical dimensions and weights of M10 Series GPS Modules

4. Setup Instructions

4.1 Connection Methods

The M10 series GPS modules support two primary connection methods: direct plug-in using the provided cable or soldering to PCB pads.

4.1.1 SH Plug-in Socket Wiring

Connect the GPS module to your flight controller using the SH plug-in socket and the supplied cable. Ensure correct pin alignment as shown in the diagram below.

Figure 3: Wiring Diagram for SH Plug-in Socket (M10-25Q, M10-18, M10-12)

NOTE: Make sure the wiring is correct before powering, otherwise the product may be damaged.

4.1.2 Soldering Pad Wiring

For a more permanent or custom installation, the modules can be soldered directly to PCB pads. Refer to the soldering diagram for correct pin assignments.

Figure 4: Wiring Diagram for Soldering Pads (M10-25Q, M10-18, M10-12)

NOTE: Make sure the wiring is correct before powering, otherwise the product may be damaged.

4.2 Firmware Compatibility

The choice of GPS module may depend on your flight controller's firmware:

• M10-12 and M10-18 GPS (without compass) are recommended for flight controllers running BF (Betaflight) firmware.
• M10-25Q (with integrated QMC5883L compass) is recommended for flight controllers running INAV firmware, which can utilize the compass for enhanced navigation.

Figure 5: Recommended Firmware for M10 Series GPS Modules

5. Operating Instructions

5.1 Initial Power-Up and Satellite Acquisition

1. After connecting the GPS module to your flight controller and powering on your device, place the drone in an open area with a clear view of the sky.
2. The GPS module will begin searching for satellites. The high-quality ceramic antenna and 72 search channels facilitate fast satellite acquisition.
3. A larger antenna area generally leads to faster satellite search speed. The M10-25Q has the largest antenna area, followed by M10-18, then M10-12.
4. Wait for the GPS module to achieve a stable lock, indicated by an LED on the module (if present) or feedback from your flight controller software.

Figure 6: Antenna Area Comparison (M10-25Q > M10-18 > M10-12)

5.2 Data Output

The GPS modules output positioning data at a default frequency of 10Hz (configurable from 1Hz-10Hz).

• M10-12 and M10-18: Utilize the UBLOX output protocol.
• M10-25Q: Supports NMEA/UBLOX dual protocol and I2C for compass data (Mag).

5.3 Compass Calibration (M10-25Q only)

If you are using the M10-25Q with INAV firmware, it is crucial to calibrate the integrated QMC5883L compass after installation and whenever the module's orientation changes significantly. Refer to your flight controller's firmware documentation for detailed compass calibration procedures.

6. Maintenance

• Keep Clean: Ensure the module and its connectors are free from dust, dirt, and moisture. Use a soft, dry cloth for cleaning.
• Avoid Physical Damage: Handle the module with care. Avoid dropping it or subjecting it to excessive force, which can damage the sensitive electronic components or the ceramic antenna.
• Temperature Range: Operate and store the module within the specified temperature ranges (-40°C to +85°C for operation, -40°C to +105°C for storage) to ensure longevity and reliable performance.
• Secure Mounting: Ensure the module is securely mounted to prevent vibrations or movement during flight, which could affect positioning accuracy or damage connections.

7. Troubleshooting

7.1 No GPS Lock / Slow Satellite Acquisition

• Check Wiring: Verify all connections (GND, TX, RX, V, SCL, SDA) are correct and secure according to the wiring diagrams (Figures 3 and 4). Incorrect wiring is a common cause of issues.
• Clear Sky View: Ensure the drone and GPS module are in an open outdoor area with an unobstructed view of the sky. Indoor environments or areas with tall buildings/dense foliage can block satellite signals.
• Allow Time: The first satellite acquisition (cold start) can take several minutes. This is normal. Be patient and allow sufficient time for the module to acquire enough satellites for a lock.
• Interference: Keep the GPS module away from other electronic components that might generate electromagnetic interference (e.g., VTX, ESCs, motors).

7.2 Inaccurate Positioning

• Antenna Orientation: Ensure the ceramic antenna faces upwards towards the sky.
• Module Placement: Mount the GPS module as far as possible from noise-generating components.
• Environmental Factors: GPS accuracy can be affected by atmospheric conditions, satellite availability, and signal reflections from nearby structures.

7.3 Compass Issues (M10-25Q only)

• Calibration: Perform a compass calibration as per your flight controller's firmware instructions. This is critical for accurate heading.
• Magnetic Interference: Keep the M10-25Q module away from magnets, ferrous metals, and high-current wires, which can interfere with the compass readings.
• Orientation: Ensure the compass is correctly oriented in the flight controller software relative to the drone's forward direction.

8. User Tips

• Choose the Right Module: Select the M10-25Q if your application requires a compass (e.g., INAV builds for advanced navigation). For simpler BF builds, M10-12 or M10-18 are suitable.
• Optimal Mounting: For best GPS performance, mount the module on a mast or in a location with the clearest possible view of the sky, away from other electronics.
• Initial Setup Patience: The first time you power up the GPS module, it might take longer to get a satellite lock. This is normal. Subsequent locks will be faster.
• Verify Connections: Double-check all wiring before applying power to prevent damage to the GPS module or flight controller.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt as proof of purchase.