# CUAV NEO 3 Pro

<Badge type="tip" text="PX4 v1.13" />

NEO 3Pro is a DroneCan GPS receiver produced by CUAV.
It integrates UBLOX M9N, STM32F4 MCU, RM3100 compass, three-color LED light and safety switch.

![Hero image of Neo3 Pro GPS](../../assets/hardware/gps/cuav_gps_neo3/neo_3pro.jpg)

## Technical Specifications

| Hardware                                          | Type                                                                           |
| :------------------------------------------------ | :----------------------------------------------------------------------------- |
| Processor                                         | STM32F412                                                                      |
| Compass                                           | RM3100                                                                         |
| Barometer                                         | MS5611                                                                         |
| GNSS receiver                                     | UBLOX NEO M9N                                                                  |
| RGB drive                                         | NCP5623C                                                                       |
| Buzzer                                            | Passive buzzer                                                                 |
| Safety switch                                     | Physical button                                                                |
| GNSS                                              | Beidou, Galileo, GLONASS, GPS                                                  |
| GNSS Augmentation System                          | SBAS:WAAS,EGNOS,MSAS<br>QZSS:L1s(SAIF)<br>other：RTCM3.3                       |
| Number of concurrent GNSS                         | 4                                                                              |
| Frequency band                                    | GPS:L1C/A<br>GLONASS:L10F<br>Beidou:B1I<br>Galileo:E1B/C                       |
| Horizontal accuracy                               | 2.0M                                                                           |
| Speed accuracy                                    | 0.05M/S                                                                        |
| Nav. update rate                                  | 25Hz(Max)                                                                      |
| Acquisition                                       | Cold start：24S<br>Hot start：2S<br>Aided start:2s                             |
| Number of satellites(MAX)                         | 32+                                                                            |
| Sensitivity                                       | Tracking and nav-167dBm<br>Cold start Hot star-148dBm<br>Reacquisition -160dBm |
| Protocol                                          | UAVCAN                                                                         |
| Port TYpe                                         | GHR-04V-S                                                                      |
| Supported flight controller                       | CUAV series,<br>Pixahwk series                                                 |
| Wave filtering                                    | SAW+LNA+SAW                                                                    |
| Anti-Electromagnetic/radio frequency interference | EMI+RFI                                                                        |
| Upgrade firmware                                  | support                                                                        |
| Input voltage                                     | 5V                                                                             |
| Operating temperature                             | -10~70℃                                                                        |
| Size                                              | 60*60*16MM                                                                     |
| Weight                                            | 33g                                                                            |

## Where to Buy

- [CUAV](https://www.alibaba.com/product-detail/Free_shipping_CUAV_Neo_3_pro_drone_UAVCAN_GNSS_processor_STM32F412_autopilot_ublox_M9N_positioning_RM3100_compass_uav_gps_module_1600165544920.html)

## Wiring and Connections

NEO 3 Pro connected to autopilot CAN1/CAN2 interface

![NEO 3 Pro connected to autopilot CAN1/CAN2 interface](../../assets/hardware/gps/cuav_gps_neo3/neo_3pro_connect.png)

## PX4 Configuration

Open **QGroundControl > Parameters** and modify the following parameters:

- `UAVCAN_ENABLE`Set to `Sensors Automatic config` .
- `UAVCAN_SUB_GPS` Set to `Enable`.

![QGC Full Parameter screen showing DroneCan (UAVCAN) parameters](../../assets/hardware/gps/cuav_gps_neo3/px4_can.jpg)

## More info

- [CUAV docs](https://doc.cuav.net/gps/neo-series-gnss/en/neo-3-pro.html)