> For the complete documentation index, see [llms.txt](https://docs.holybro.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.holybro.com/gps-and-rtk-system/m8n-m9n-m10-gps/dronecan-m9n-m8n/overview.md).

# Overview

<div><figure><img src="https://2367252986-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLIgtGDAvVGkCKGOJb1bR%2Fuploads%2Fi1uXvLwuRuaS2QxlHww7%2FDroneCAN%20M8N.jpg?alt=media&amp;token=f4e08638-fe93-4efd-83cd-314d318beada" alt="" width="375"><figcaption></figcaption></figure> <figure><img src="https://2367252986-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLIgtGDAvVGkCKGOJb1bR%2Fuploads%2FEqrCvyiLuVBMpQZr9joI%2FM9N.jpg?alt=media&amp;token=5a8ccd12-e2bb-41bf-be61-801e5254223a" alt="" width="375"><figcaption></figcaption></figure></div>

**Descriptions：**

The Holybro DroneCAN GPS has an UBLOX M8N or M9N module, BMM150 compass, tri-colored LED indicator. It has adopted the DroneCAN protocol for communication. It is better in dealing with electromagnetic interference compare to serial connection, making it more reliable. It does not occupy any serial port of the flight controller, and different CAN devices can be connected to the same CAN bus via a CAN splitter board.

#### **Features and Specifications:**

<table><thead><tr><th width="189.40239857611564"></th><th width="186.97229978352215">DroneCAN M8N &#x26; M9N</th></tr></thead><tbody><tr><td>GNSS Receiver</td><td>Ublox NEO M8N</td></tr><tr><td>Number of Concurrent GNSS</td><td>M8N - Up to 3 GNSS<br>M9N - Up to 4 GNSS</td></tr><tr><td>Processor</td><td>STM32G4 (170MHz, 512K FLASH)</td></tr><tr><td>Compass</td><td>BMM150 or IST8310</td></tr><tr><td>Frequency Band</td><td>GPS: L1C/A<br>GLONASS: L10F<br>Beidou: B1I<br>Galileo: E1B/C</td></tr><tr><td>GNSS Augmentation System</td><td>SBAS: WAAS, EGNOS, MSAS, QZSS</td></tr><tr><td>Navigation Update</td><td>5Hz Default(10Hz MAX)     </td></tr><tr><td>Navigation sensitivity</td><td> –167 dBm</td></tr><tr><td>Cold starts</td><td>~ 26s</td></tr><tr><td>Accuracy</td><td>2.5m</td></tr><tr><td>Speed Accuracy</td><td>0.05 m/s</td></tr><tr><td>Max # of Satellites</td><td>22+</td></tr><tr><td>Default CAN BUS data rate</td><td>1MHz</td></tr><tr><td>Communication Protocol</td><td>DroneCAN @ 1 Mbit/s</td></tr><tr><td>Firmware Support</td><td>PX4, Ardupilot</td></tr><tr><td>Port Type</td><td>GHR-04V-S</td></tr><tr><td>Antenna</td><td>25 x 25 x 4 mm ceramic patch antenna</td></tr><tr><td>Voltage</td><td>4.7-5.2V</td></tr><tr><td>Power consumption</td><td>Less than 200mA @ 5V</td></tr><tr><td>Temperature</td><td>-40~80C</td></tr><tr><td>Size</td><td>Diameter: 54mm<br>Thickness: 14.5mm</td></tr><tr><td>Weight</td><td>36g</td></tr><tr><td>Cable Length</td><td>26cm</td></tr><tr><td>Other</td><td><ul><li>LNA MAX2659ELT+ RF Amplifier</li><li>Rechargeable Farah capacitance</li><li>Low noise 3.3V regulator</li><li>26cm cable included</li></ul></td></tr></tbody></table>


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