RE: ubxtool

[rhowitt]

>> 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.

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!!!!!!

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

Is there some way to turn off those strings?

-----Original Message-----
From: gpsd-users <gpsd-users-bounces+rhowitt=address@hidden> On Behalf
Of Gary E. Miller
Sent: Monday, April 13, 2020 7:20 PM
To: 'gpsd users' <address@hidden>
Subject: Re: ubxtool

Yo address@hidden!

> Got the analyzer hooked and have done captures from Windows to GPS ( 
> rtklib's strsrv )  and GPSD to GPS.
> Not sure how you wanted the data so to start I did a hex dump to a 
> binary file.
> Description of the attached files.
> FAIL-F9P...       contains the GPSD RTCM data.      RTK LED was off
> Succes-F9P...  contains the STRSRV RTCM data.   RTK LED was  blinking 

They look pretty much the same to me.  Exacpt the FAIL had this at the top:

$PASHQ,RID*28
@F0.3=1*67
@F2.2=1*64

Did windows send any initialization to the receiver?

> F9P_UART_TX--PI   contains F9P send to the PI, during the Fail session
> F9P-UART_TX--PC   contains F9P send to the PCX , during the Success
> session
> 
> I use the Saleae analyzer so if needed I can dump the whole analysis 
> to a file that will contain both the digital and analog signals.
> You can download their software (free) and "replay" the log file .

No, I can't replay the log file.  Their software is binaries that do not run
for me.

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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