RTK Board Integrates with Autopilot (Pixhawk)

(Figure 1 Demonstration of Integration with Pixhawk autopilot)

Precis RTK board can be integrated with autopilots. We use the connection to Pixhawk flight control as an example. A cable is used to connect the COM1 port of Precis RTK board and the GPS port of the Pixhawk (see Figure 1). It is noticed that the GPS port need a 6pin PicoBlade connector while the COM1 port is a 5pin PicoBlade connector. The pin definition of the Pixhawk GPS port is listed in Table 1. With regarding to the power consumption, we recommend using external power sources. Please also pay attention to the baud rate setting of Pixhawk. Then you need to mount the GNSS antenna and tether the board on your vehicle. 

Please beware of following instructions when you mount the GNSS antenna to your drone.

■ Place the module on the outside of your vehicle (in an elevated position if appropriate) with a clear view of the sky

■ Distance the module from DC power wiring and the batteries by at least 10cm


Next step is setting up the Pixhawk with mission planner. Open Mission planner software and choose the right COM port on the top right corner. Choose 115200 as baud rate (default baud rate of Precis RTK board COM1 port). Then click ‘connect button’ on the right. Then it is recognized by mission planner if the GPS status becomes ‘3D Fix’ (see Figure 2).

(Table 1 Pin definition of Pixhawk GPS port, from left to right)

(Figure 2 Precis RTK board is recognized by Pixhawk and Mission Planner)

To get more info on the functions and get support for trouble shooting, drop us a mail sales@tersus-gnss.com or visit our official website www.tersus-gnss.com for the User Guide. 

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Comment by Tiziano Fiorenzani on April 17, 2016 at 8:01am
I can't speak for others, but I would really appreciate some videos, telemetry logs, or every other real life example that makes me confident to buy your system.
Comment by Peter on April 17, 2016 at 11:27am

Looks promising. Would love to see a real-world example using a Pixhawk. Also, I'm wondering for aerial applications would anything be gained using your L1/L2 board instead of just the L1 board? What would adding L2 benefit? Is it just a matter of faster integer ambiguity resolution?

Comment by Peter on April 17, 2016 at 12:13pm

Another question, will this board simultaneously log raw data so that if lock is temporarily lost that data can be post processed after a mission? Important if to be used for mapping (my application).

Comment by Tersus GNSS on April 18, 2016 at 1:14am

Hi @ Tiziano Fiorenzani, thanks for your comment. We will post some sample data/ pictures in next couple weeks.Stay tuned.

Comment by Tersus GNSS on April 18, 2016 at 1:17am

Hi @ Peter. Yes, Precis board allows to log the raw data for post process. BX303 can log the data in onboard SD card, while BX305 can log the observation data together with the NMEA solution. The observation are logged in binary format, you also need to convert to rinex first. For your second questions, L1/L2 board allows to extend the coverage area to 20-30 km. Moreover, L1 and L2 board provide more reliable and robust solution in challenge environment. L1 and L2 board is still the mainstream board for precise navigation. If you have further questions, feel free to let me know.

Comment by Tiziano Fiorenzani on April 18, 2016 at 8:35am

Great, cant' wait!

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