Holybro - DroneCAN H-RTK F9P Helical

Overview

The DroneCAN H-RTK F9P is the latest differential high-precision GNSS positioning system from Holybro. It has adopted the DroneCAN protocol for communication. It provides multi-band RTK with fast convergence times and reliable performance, concurrent reception of GPS, GLONASS, Galileo, and BeiDou, and a fast update rate for highly dynamic and high-volume applications with centimeter accuracy. 

With the adoption of the DroneCAN Protocol, it has up to an 8 Hz navigation update rate, upgradeability, noise immunity, and real-time features, and is more robust than UART due to its increased resistance to electromagnetic interference. It does not occupy any serial port of the flight controller, and multiple CAN devices can be connected to the same CAN bus via a hub. 

The DroneCAN-F9P uses a u-blox ZED-F9P module, an IST8310 (legacy: BMM150) compass, and a tri-colored LED indicator, and is equipped with the STM32G4 processor running at 170 MHz with 512 KByte Flash and 96KByte RAM. It supports DroneCAN firmware upgrades via the DroneCAN GUI Tool. It is compatible with the open-source Pixhawk series flight controller.

Now supports software toggle for CAN termination resistance

RTK Testing & Comparison: Big GPS Round Up by Andrew Tridgell (Ardupilot)