The DJI Matrice 300 RTK is one of the most popular industrial drones for inspection and mapping, but its internal GNSS is not immune to interference near power lines, cell towers, or industrial sites. Adding an external Septentrio-powered GNSS receiver gives your M300 independent RTK positioning with AIM+ anti-jamming protection.
Compatible Receivers
| Model | Weight | Module | Use Case |
|---|---|---|---|
| HB6 | ~85g | mosaic-X5 | RTK + AIM+ anti-jamming for general mapping |
| EV322 | ~45g | mosaic-G5 | Ultra-light, confined spaces, secondary positioning |
| HB21 | ~200g | mosaic-X5 | All-in-one with 4G LTE and heading |
Mounting on M300 RTK
The M300 has a 2.7kg payload capacity, so weight is not a constraint. The HB6 mounts easily on the top plate using existing threaded holes. For LiDAR payloads, mount the receiver between the landing gear on a 3D-printed bracket. The external GNSS antenna should have clear sky view on the top deck.
Wiring
Connect the receiver to the M300’s payload power port (12V, P-TAP/XT30). Both receivers accept 5-24V and draw under 2W. The receiver outputs NMEA/SBF data via UART for logging to an onboard companion computer or for real-time telemetry downlink.
FAQ
Does the external receiver integrate with DJI Pilot 2?
The receiver operates as an independent payload, not as an input to DJI Pilot 2. It logs positions internally for post-mission geotagging and quality verification. This is the standard workflow for professional LiDAR and photogrammetry operations.
Can I use the M300’s OSDK port for the receiver?
Yes – the M300’s OSDK port provides serial (UART) and power. You can connect the receiver’s UART to the OSDK port for data logging via the onboard DJI payload. Configure the OSDK UART baud rate to match the receiver (typically 460800).
What is the battery impact of adding the receiver?
Negligible. The receiver draws under 2W. On the M300’s dual TB60 batteries (5800mAh each), this represents under 1% of total power draw. Flight time impact is less than 1 minute on a standard mission.
Will this help with RTK fix in mountainous terrain?
Partially. AIM+ helps with RF interference, not with sky obstruction. However, the Septentrio module tracks more constellations simultaneously (GPS + GLONASS + Galileo + BeiDou + QZSS = 40+ satellites), giving you more satellite options in obstructed environments compared to consumer-grade receivers.
Can I upgrade the firmware on the receiver via the M300’s 4G modem?
Firmware updates require a direct USB connection to RxTools, not an over-the-air update. However, you can stream SBF data from the receiver over the M300’s 4G link for real-time monitoring via RxControl on the ground.
Related GNSS Products
- HB6 GNSS Box Receiver – Compact RTK with AIM+ anti-jamming
- EV322 GNSS Receiver – Ultra-light 45g RTK
- AIM+ Anti-Jamming Technology
