Holybro H-RTK NEO-F9P (RM3100 Compass)
Series: Holybro RTK GNSS modules for drones
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The Holybro H-RTK NEO-F9P with RM3100 compass is an RTK GNSS for L1 and L5 for medium-class multicopters. Chinese maker Holybro builds it around the u-blox NEO-F9P and offers it as a UART or DroneCAN version with a helical or patch antenna.
The receiver handles GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC and SBAS on the L1 and L5 bands (among others GPS L1C/A and L5, Galileo E1-B/C and E5a, BeiDou B1I and B2a). For RTK Holybro states 0.01 m + 1 ppm as CEP, that is 1 cm at a radius containing half of the measurements; for the position without corrections 1.5 m CEP, with SBAS 1.0 m CEP. The 25 Hz applies only with GPS alone; with GPS, GLONASS, Galileo and BeiDou together, RTK and position run at 7 Hz. The compass is an RM3100. NMEA, UBX, RTCM 3.3 and SPARTN 2.0.1 are spoken, and the DroneCAN version runs at 1 Mbit/s. The weight is 39 g for the rover, 40 g for the module and 40.5 g for the DroneCAN module.
SPARTN is the correction format of PPP-RTK services, in which the corrections come from a provider over the internet or by satellite instead of from a nearby base. The EU classes apply to the aircraft: from C1 upward geo-awareness and remote ID are mandatory, both resting on the GNSS position, and RTK replaces none of the duties. Classic RTK corrections come from your own base, a radio link or NTRIP.
For selection it matters that in L1/L5 operation GLONASS appears only on L1 (L1OF); the dual-band principle applies to GPS, Galileo, BeiDou, QZSS and NavIC. Anyone who needs 25 Hz must count on a single system. The antenna choice, helical or patch, decides the mounting place and the behaviour under reflections. Upkeep includes compass calibration, firmware and a check of the connectors.
Technical data
Other data
| Chipset | u-blox NEO-F9Pcorrect |
|---|---|
| Compass | RM3100correct |
| Constellations | ['GPS', 'GLONASS', 'Galileo', 'BeiDou', 'QZSS', 'NavIC', 'SBAS']correct |
| Frequency bands | L1/L5: GPS L1C/A L5, GLONASS L1OF, Galileo E1-B/C E5a, BeiDou B1I B2a, QZSS L1C/A L1S L5, NavIC L5correct |
| Horizontal accuracy (cm) | 1correct |
| Interfaces | UART/I2C oder DroneCAN 1 Mbit/s; NMEA, UBX, RTCM 3.3, SPARTN 2.0.1correct |
| RTK capable | yescorrect |
| Update rate (Hz) | 25correct |
| Weight (g) | 39correct |
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Ask about parts availability for this build year — the running costs hang on it.
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