DroneCAN (CAN bus) interface for robust wiring, daisy-chaining and GPS redundancy
In stock
Gps Gnss
CUAV NEO 3 Pro GPS (M9N, CAN bus)
The CUAV NEO 3 Pro is a DroneCAN-standard GNSS module that brings industrial-grade positioning and redundancy to ArduPilot and PX4 autopilots over a CAN bus interface.
₹17,999 + 18% GST
SKU: BOTBIT-GPS-08 · Best for: Redundant GPS setups on commercial UAVs
Overview
About CUAV NEO 3 Pro GPS (M9N, CAN bus).
The CUAV NEO 3 Pro is a DroneCAN-standard GNSS module that brings industrial-grade positioning and redundancy to ArduPilot and PX4 autopilots over a CAN bus interface. It is built around the u-blox NEO-M9N receiver and adds an STM32F412 processor, an RM3100 industrial-grade compass, an MS5611 barometer, and a SAW + LNA + SAW triple-filter front end, integrating compass, baro, status LED, buzzer and safety switch into one compact 60 x 60 mm unit. Four constellations (GPS, GLONASS, Galileo, BeiDou) are tracked concurrently with SBAS.
Using CAN bus (DroneCAN) instead of UART gives the NEO 3 Pro better noise immunity over long cable runs, easier daisy-chaining and native support for redundant GPS setups on larger aircraft. The RM3100 magnetometer offers superior anti-interference performance compared with consumer compass chips, and the triple-filter design protects the GPS from remote-control, data-link and 4G interference. Navigation accuracy is 1.5 m with SBAS (2.0 m without), at up to a 25 Hz update rate.
The NEO 3 Pro suits professional and commercial operators building robust, redundant UAVs, long-airframe fixed-wing and VTOL platforms, and anyone wanting clean CAN-bus wiring. It supports RTCM3.3 injection for pseudorange (meter-level) differential positioning, though it is not a carrier-phase RTK receiver.
Key features
Why it stands out.
u-blox NEO-M9N tracks four constellations concurrently with SBAS
RM3100 industrial compass and MS5611 barometer for high noise immunity
SAW + LNA + SAW triple filter rejects RC, data-link and 4G interference
Integrated STM32F412, status LED, buzzer and safety switch in one module
Specifications
Selection facts.
| Receiver | u-blox NEO-M9N |
|---|---|
| Processor | STM32F412 |
| Compass | RM3100 (industrial) |
| Barometer | MS5611 |
| GNSS | GPS/QZSS L1C/A, GLONASS L1OF, BeiDou B1I, Galileo E1B/C, SBAS |
| Horizontal accuracy | 1.5 m (with SBAS) / 2.0 m (without) |
| Update rate | Up to 25 Hz |
| Protocol / connector | DroneCAN (CAN bus), GHR-04V-S |
| Supply voltage | 5 V |
| Weight / dimensions | 33 g / 60 x 60 x 16 mm |
Applications
Where it is used.
- Redundant GPS setups on commercial UAVs
- Long fixed-wing and VTOL airframes (CAN bus)
- ArduPilot/PX4 DroneCAN navigation systems
- RF-heavy builds with VTX, data-link and 4G
- Pseudorange differential (RTCM) positioning
- Professional mapping, survey and inspection drones
Buying guide
How to choose.
Choose the NEO 3 Pro when you want CAN-bus wiring and the reliability advantages it brings. DroneCAN tolerates long cable runs better than UART, simplifies redundant dual-GPS installs, and reduces wiring clutter on large airframes. Combined with the RM3100 industrial compass and MS5611 barometer, it is aimed at professional builds where robustness and noise immunity justify the higher cost over the standard NEO 3.
Confirm your flight controller supports DroneCAN over a CAN port; on ArduPilot and PX4 this is well supported but requires enabling CAN drivers and assigning the node. The connector is CUAV's GHR-04V-S 4-pin CAN type, so source the correct CAN cable. Both ArduPilot and PX4 are supported, with ArduPilot integration being the most mature.
Be clear on differential support: the NEO 3 Pro accepts RTCM3.3 injection for pseudorange (meter-level) differential positioning but does not provide carrier-phase RTK and does not output RTCM. If you need centimetre-level RTK, use a dedicated RTK receiver instead. The -10 to +70 C range and 5 V supply should be checked against your deployment environment.
FAQ
Common questions.
What makes the NEO 3 Pro different from the NEO 3?
The Pro uses a DroneCAN (CAN bus) interface instead of UART, adds an STM32F412 processor, an RM3100 industrial compass and an MS5611 barometer, and is built for redundant, professional installs. The standard NEO 3 uses the same M9N receiver and triple filter but over UART+I2C at lower cost.
Why use CAN bus over a serial GPS?
CAN bus (DroneCAN) tolerates long cable runs with better noise immunity, simplifies wiring, and natively supports redundant multi-GPS setups by daisy-chaining nodes. This is valuable on large fixed-wing, VTOL and commercial airframes where serial cabling is more error-prone.
Does the NEO 3 Pro support RTK?
No. It accepts RTCM3.3 injection for pseudorange (meter-level) differential positioning but does not support carrier-phase RTK and does not output RTCM. For centimetre-level RTK accuracy you must use a dedicated RTK receiver such as a u-blox F9P based system.
What compass and barometer does it use?
It uses an RM3100 industrial-grade magnetometer, which offers better anti-interference performance than consumer compass chips, and an MS5611 barometer for altitude. Together with the STM32F412 processor and triple-filter front end, this gives a robust, noise-immune navigation package.
Which firmware and connector does it use?
It is compatible with ArduPilot and PX4 over DroneCAN, with ArduPilot integration being the most mature. It uses CUAV's GHR-04V-S 4-pin CAN connector, so confirm your flight controller has a CAN port and source the correct CAN cable before installation.
What accuracy can I expect?
Horizontal accuracy is about 1.5 m with SBAS augmentation and 2.0 m without, at up to a 25 Hz update rate using four concurrent constellations. With RTCM pseudorange differential corrections you can reach meter-level positioning, but this is not centimetre-level RTK.
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