Re: ubxtool

[Gary E. Miller]

Yo address@hidden!

On Tue, 14 Apr 2020 10:06:04 -0400
<address@hidden> wrote:

> >> Did windows send any initialization to the receiver?  
> Windows (rtklib 's strSrv) does not send any initialization.
> 
> Based on that fact I did a test.
> 1) Started GPS
> 2) Started StrSrv -  
> 3) Got a RTK Fix on GPS
> 4) Left StrSrv running, but turned power off to the GPS ( StrSrv is
> still piping RTCM3 message out serial port)
> 5) Turn GPS back on
> 6) After GPS boots,  GPS gets an RTK Fix.
> On Windows everything is happy , happy.

Back up a few.  So you are running StrSrv into the receiver serial port,
but gps is connecting to the USB port?

I noted before that the defaults for the u-blox serial port and USB port
are not the same.  I asked before for you to send us the u-blox config
for those ports.

Seems as important now as before.

> So, did the following Test on Raspberry PI
> 1) GPS is off
> 2) set /dev/AMA0  to baud rate 38400
> 3) Start GPSD ( the F9P does not receive the interrogation strings
> from GPSD)
> 4) Turned GPS on
> 5) After GPS boots, GPS gets an RTK FIX  ( First time I have ever
> seen this )
> Yeah!!!!!!

The two tests use different ports on the receiver.

Also, without the raw data back from receivers in both tests there is
no way for anyone to confirm what you think you see.

> It  appears that there is something in the interrogation strings that
> GPSD is sending out, which puts the F9P in a 'non-RTK' mode.  

I doubt it, but easy to see.  Look in driver_ubx.c, ubx_cfg_prt()

> Is there some way to turn off those strings?

Start gpsd with "-b".

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

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    "If you can't measure it, you can't improve it." - Lord Kelvin

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