[FOSS-GPS] Configuring a NV08C for rtklib

Fri Sep 25 04:19:17 PDT 2015

Hi Fred,

There is only one last thing that I have forgetten to mention. Did you set
Odd parity in COM-port settings in your experiments???

Today I've used thik kit:
http://www.nvs-gnss.com/products/evk/item/4-evk-csm.html with RTKlib2.4.2
and it worked fine. I used the following commands at start-up:
!NVS CFG-PVTRATE 2
!WAIT 1000
!NVS CFG-RAWRATE 2

In order to get data from USB (COM PORT0) at first I switched from NMEA to
BINR in BM control (alternatively NMEA $PORZA message can be used for this
purpose). When I used COM PORT with DB9 connector I didn't make any
preparations.

Regards,
Artyom

On Thu, Sep 24, 2015 at 7:35 PM, Fred Labrosse <ffl at aber.ac.uk> wrote:

>
> > On 24 Sep 2015, at 07:06, Artyom G <gnsssdr at gmail.com> wrote:
> >
> > Hi Fred,
> >
> > USB port can output BINR data too. You can use "BM control" programm (
> http://navis.ru/assets/images/prog_ob/BM_Ctrl_V0430.zip ) to switch from
> NMEA to BINR. Or you can find in the documentation special command that
> changes NMEA to BINR and send them yourself.
>
> Thanks again for the pointers, they have been very useful.
>
> Today we played a lot with BM_Ctrl (V0434 provided with the evaluation
> kit).  We managed to set the mode of the various ports, to get the
> necessary data (in BM_Ctrl), etc.  However, this is all reset when the
> board is disconnected (for example to use it on the actual computer that
> runs rtklib for our experiments).  Is there a way to save the settings
> permanently in the board so that they survive a restart?
>
> We have also been playing with BM_Ctrl talking to the NV08C on one port,
> setting the other to BINR and using that port with rtklib.  However, rtklib
> does not seem to receive anything when the port is in BINR mode (sometimes
> does but only a couple of message types, not enough for rtklib, and we
> haven’t found out why sometimes and not always).  We came to the conclusion
> that we either need to find the instructions to tell the NV08C to always
> send the needed data or to have rtklib to regularly ask for it (as BM_Ctrl
> seems to be doing).  I have tried the commands given by Artyom below and
> tried the file on onetalent, but neither did that.  We seem to connect from
> rtklib on a BINR port but we do not get sent anything.
>
> What are we missing?  What are the correct instructions to send?
>
> Cheers,
>
> Fred
>
> >
> > RTKlib works with "raw data" from nv08c (pseudorange+pseudophase and
> ephemeris data). By default these messages are turned off in the receiver.
> So you have to send special BINR commands to activate them. BINR protocol
> is published by receiver manufacturer:
> http://www.nvs-gnss.com/support/documentation/item/download/39.html .
> >
> > All descriptions in internet of how to connect nv08c to RTKlib copy
> settings that can be found here:
> http://www.onetalent-gnss.com/ideas/usb-hw-receivers/denga10 (
> http://www.onetalent-gnss.com/ideas/usb-hw-receivers/denga10/rtklib242b4_mb.zip?attredirects=0&d=1).
> You can copy settings of the nvs_raw_1Hz.txt or nvs_raw_10Hz.txt to the cmd
> window of input stream.
> >
> > But if you use the latest version of RTKlib you can use commands that
> are more readable. In the RTKlib manual on page 11 there are commands that
> rtklib supports for nv08c:
> >
> > !NVS ... : NVS NV08C binary command
> > !NVS CFG-PVTRATE [arg...] configure PVT rate
> > !NVS CFG-RAWRATE [arg...] configure raw data rate
> > !NVS CFG-SMOOTH configure smooth range
> > !NVS CFG-BINR xx [...] send binary command for NVS
> > (input hexadecimal series)
> > !WAIT time : wait for time (ms)
> >
> > So in the cmd window of input stream you can simply print something like:
> > !NVS CFG-PVTRATE 1
> > !WAIT 1000
> > !NVS CFG-RAWRATE 1
> >
> > And you will get 1HZ raw data stream to RTKnavi.
> >
> > You can check that RTKnavi is receiving raw data by clicking on the
> button "RTK monitor" and then choosing "Obs data" or "Nav GPS" or "NAV
> GLONASS" and you should see there observations, GPS ephemeris and GLONASS
> ephemeris respectively.
> >
> > Regards,
> > Artyom
> >
> >
> > On Wed, Sep 23, 2015 at 8:39 PM, Fred Labrosse <ffl at aber.ac.uk> wrote:
> > All,
> >
> > I am not quite new with RTKLIB (I have used it at some point with a pair
> of Yuan10 receivers).  We have just taken delivery of 2 NV08C evaluation
> kits (NV08C-EVK-CSM) and tried to use rtklib.
> >
> > So far not much success.  The first issue is that we finally realised
> that the USB port only sends NMEA by default.  So we switched to the D9
> connector that does send BINR data.  Clearly rtklib is receiving the data
> (the data display window in NVS BINR mode shows regular lines with a
> message type and length), but no processing is happening (solid rather than
> flashing processing “LED” in rtknavi and no solution data displayed or
> logged).  The receiver do get a fix, according to the NMEA we get on the
> USB port.
> >
> > The documentation seems to indicate that what data we want to get has to
> be configured, but we have not yet found a way to do that.  Any chance
> anybody has managed that could share info please?
> >
> > Cheers,
> >
> > Fred
> >
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