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Position Navigation and Timing (PNT) / Articles / DroneCAN Compass for Reliable Heading Estimation

DroneCAN Compass for Reliable Heading Estimation

GNSS.store's ELT0251 ultra-light DroneCAN compass combines RM3100 magneto-inductive sensing, DroneCAN connectivity, and Pixhawk, PX4, and ArduPilot compatibility for reliable autonomous heading estimation Position Navigation and Timing (PNT) / Feature Article by GNSS.store

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The ELT0251 from GNSS.store is an ultra-light DroneCAN compass designed for Unmanned Aerial Vehicles (UAVs), robotics, and autonomous platforms.

DroneCAN Compass for Reliable Heading Estimation Built around the RM3100 magneto-inductive three-axis sensor, the module is designed to deliver clean, stable magnetic field data for more reliable heading estimation. Weighing 9 g, it features a robust DroneCAN interface and is compatible with Pixhawk, PX4, and ArduPilot.

Compass performance plays an important role in autonomous flight. Built-in compass modules are often positioned close to motors, Electronic Speed Controllers (ESCs), batteries, and high-current wiring, where magnetic interference is strongest. This can result in noisy magnetic data, unstable yaw estimation, and less reliable navigation.

The ELT0251 can be mounted away from power electronics to help reduce magnetic interference and improve navigation stability.

RM3100 Magneto-Inductive Sensor

DroneCAN Compass for Reliable Heading Estimation The ELT0251 is built around the RM3100 magneto-inductive three-axis sensor. Compared with many low-cost compass solutions, it offers higher sensitivity, low noise, and strong repeatability.

Based on PNI’s proprietary magneto-inductive technology, the RM3100 delivers professional-grade heading accuracy, ultra-low drift, exceptional resolution, and repeatability. With a resolution of 10 nT and extremely low magnetic hysteresis, the sensor is suited to applications that demand precise heading accuracy.

DroneCAN Integration

The ELT0251 features the DroneCAN output protocol, providing reliable long-distance connectivity and simplified integration without using serial ports. Despite its protective housing, the module remains highly compact and is fully compatible with Pixhawk, PX4, and ArduPilot, making it suitable for precise and stable navigation.

Physical Characteristics

  • Dimensions: 27 × 36 × 15 mm
  • Weight: 9 g
  • Supply voltage: 4.75 to 5.25 V
  • Operating temperature: -25 °C to +85 °C
  • Connector type: 4-pin JST-GH 1.25
  • Mounting option: Screw mount
  • RoHS and REACH compliant
  • Fully assembled, tested, and ready for use
Posted by Olivia Hannam Olivia is an Editor and Copywriter at Defense Advancement. She graduated with First-Class Honours in History from the University of Exeter, where she developed a strong passion for research and clear communication. Since joining DA in 2025, Olivia’s focus lies in producing insightful content that highlights the latest developments and innovations shaping the defense sector, with a particular interest in naval technology and maritime defense. Connect
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