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Ground Controller Lvl 1
Message 1 of 2

ublox F9P on RTKLIB



I'm totally new in the world of DIY-GNSS-projects.

I've got two different modules, Navspark Mini and U-blox F9P which I would like to get working with RTKLIB on a RPI 3+.

As for the Mini I'm in a doubt if it will work with RTKLIB other than getting an input stream with data.

As for the F9P this should be possible.

The F9P is working fine with U-center (full functionallity as far as I can see) and I can get it working with RTKNavi on laptop in the way that it is detected, and spitting out data (the green indicators top-right indicate for GPS, Fix and data). But RTKNavi doesn't show -fix- or -solution- (coordinates).  Nor do I get up any graphical representation of satellites and signalstrength. But I can log to I file (NMEA).

To me it seems that RTKLIB on Windows and Rasbian are quite similar so I think that when I can get it working on Windows I can get it working on Rasbian by copying settings/parameters.


I'm totally fresh on this (first project since my youth which is many decades ago) but I suspect that it has something to do with the wrong output format (NMEA?) but I do not have the faintest idea where to look for a solution.

I have read a good amount of tutorials but haven't found the honey pot yet.


Somebody out here who can give me some clues about the set up?



1 Reply
Ground Controller Lvl 1
Message 2 of 2

Re: ublox F9P on RTKLIB

f9p is a dual frequency chip.

however both rtklib v2.4.2 and v2.4.3 can not decode L2 signal from ubx format.

so if you set the frequency to L1+L2, you will not get solution.

you can set bands to L1 only, or use the version from rtkexplorer,

which can decode l2 signal.


rtklib on rasbian only have command line interface,

and is not very similar to windows version.

I hardly only use rtklib on rasbian, so I do not exactly understand your problem.