NEO 3 Pro GPS¶

NEO 3 pro is UAVCAN standard GPS developed by CUAV. It integrates industrial-grade compass, barometer, flight controller status light, buzzer, and safety switch all in one package. It has the characteristics of high safety and strong interference resistance.It integrates ublox m9n module and can receive signals from GPS, Galileo, GLONASS and Beidou at the same time.

Note

NEO 3 pro is supported in ArduPilot 4.0 firmware (and higher).

Key Features¶

Processor
- STM32F412
Sensors
- Compass:RM3100
- Barometer:MS5611
RTK Receiver
- Ublox M9N
GNSS Bands
- GPS/QZSS L1 C/A,GLONASS L10F ,BeiDou B1I,Galileo E1B/C,SBAS L1 C/A: WAAS, EGNOS, MSAS, GAGAN
Number of concurrent GNSS
- 4 Simultaneous reception of satellite information
Number of satellites(MAX)
- Up to 32
Nav. update rate
- RTK Up to 25HZ
Position accuracy
- 1.5M(use sbas；default）
- 2.0M(not sbas
Acquisition
- Cold starts 24 s
- Aided starts 2 s
- Reacquisition 2 s
Sensitivity
- Tracking & Nav -167 dBm
- Cold starts -148 dBm
- Reacquisition -160 dBm
Protocol
- UAVCAN
Interface Type
- GHR-04V-S
Input voltage
- 5V
Operating temperature
- -10~70℃
Size
- 60x60x16mm
Weight
- 33g

Purchase¶

You can buy it from CUAV store.

Connect to CUAV v5+¶

Note

The connection to other flight controllers is similar.

Enable CAN port, UAVCAN, and Configure for NEO-V2 Pro¶

See CAN Bus Setup and UAVCAN Setup for more information.

Set the following parameters in all parameter tables of Mission planner and restart after writing

CAN_P1_DRIVER set to 1.
CAN_P2_DRIVER set to 1.
CAN_D1_PROTOCOL set to 1.
CAN_D2_PROTOCOL set to 1.
NTF_LED_TYPES set to 231.
GPS_TYPE set to 9.

NEO 3 pro is now ready for operation

SLCAN Interface¶

If you need to set up NEO 3 pro or upgrade its firmware, you need to enable SLCAN

Note

ArduPilot 4.0 or later firmware supports SLCAN.

Please connect NEO 3 pro to the flight controller’s CAN1 interface.
Open mission planner and connect flight controller.

Modify the following parameters in the Full Parameter tab of Mission Planner.

for CUAV V5+/nano:

CAN_SLCAN_CPORT set to 1
SERIAL7_PROTOCOL set to 22
Reboot flight controller

Note

CUAVV5 / NANO / FMUV5 flight controller running ArduPilot4.0 or later firmware will have two USB interfaces, one is flight controller’s console port (SERIAL0) running MAVLINK and one is an SLCAN interface port; if there are not two ports showing in the Mission Planner Comm Port drop-down box, please uninstall the driver and reinstall. If you continue to have problems, see Troubleshooting Composite Connections

For Pixhawk series / FMUv2 / FMU V3 / FMU V4

CAN_SLCAN_CPORT Set to 1
CAN_SLCAN_TIMOUT Set to 0 (no timeout, reboot to return to normal operation)
CAN_SLCAN_SERNUM Set to 0
Please do not reboot the flight controller until your operation is complete.

Note

STM32F4 does not support dual virtual USB ports, so flight controllers using STM32F4 processor can only be used for SLCAN after the MAVLink connection on USB is closed; after writing the above settings, the USB interface becomes an SCLAN port; MAVLink connections can be made again after a reboot. Until then the USB connection can be used for SLCAN operations.

NEO-V2 Internal Configuration¶

ArduPilot supports setting UAVCAN device internal settings through SLCAN, such as modifying node ID; enabling / disabling barometer, etc.

Select the COMM port corresponding to SLCAN.
Select the UAVCAN section under Initial Setup>Optional Hardware tab.
Click “SLCAN NODE CAN1” and
Click “Inspector”
Change configuration parameters for UAVCAN device

Enable barometer

Baro_enabled=1, 0=disabled
Reboot

Modify device ID

Modify the CAN_NODE parameter

Upgrade Firmware¶

Method One： Firmware upgrade using Mission planner

Select the COMM port corresponding to SLCAN.
Click “SLCAN NODE CAN1” on the UAVCAN section under Initial Setup>Optional Hardware tab.
Click “Update”
Select “NO” in the pop-up prompt box (Tes is to select online firmware; No selects local firmware).
Select firmware file.