Holybro DroneCAN RM3100 Professional Grade Compass

Holybro's DroneCAN RM3100 is a standalone professional-grade compass for ArduPilot and PX4 aircraft that depend on accurate heading, such as survey, mapping, VTOL and industrial multirotors. It uses PNI's RM3100 magneto-inductive sensor for high resolution with no drift, and connects over DroneCAN, so it shares the CAN bus with other peripherals instead of taking a serial port.

Key features

• RM3100 3-axis magnetometer with 10 nT resolution and ultra-low hysteresis for repeatable heading.
• ±800 µT measurement range and single-axis sampling up to 1600 Hz.
• DroneCAN output on a 4-pin JST-GH 1.25 connector, robust over longer cable runs and leaving the flight controller's UARTs free.
• IP66 rated and specified for -40 to +85 °C.
• Two cable lengths: 27 cm or 42 cm.

Specifications

• Sensor: PNI RM3100, 3-axis magneto-inductive
• Resolution: 10 nT
• Range: ±800 µT
• Max sample rate: 1600 / 850 / 440 Hz single-axis (divide by 3 for three axes)
• Interface: DroneCAN, 4-pin JST-GH 1.25
• Operating temperature: -40 to +85 °C
• Ingress protection: IP66

Mount it on a mast or arm as far as possible from motors, ESCs, power wiring and metal parts, then set it as the primary compass in your ground station.