ran ping commands on 192.168.2.2 & 1
all happy and good replies
powered ROV off and on again (disconnected )
NMEA router working good
auto connect set to UDP and listen on 27000
transponder position still showing
0000000
Go back into the QGC Settings Parameters section;
Search: GPS_TYPE
I believe it should be set to: NMEA
set to NMEA now but no difference to transponder reading 000000
also on the Map screen it has always said “No GPS lock for the Vehicle”
i do not suppose that message gives you any extra info to work with as its more to do with the lat and long 00000 readings not changing
Log into the Raspberry Pi Terminal window, 192.168.2.2:8088. Run the ‘screen’ command and see if it’s happy.
I typed in screen and then enter and got a copy right result ?
is that correct ? for a happy result ?
Type this command in the terminal window:
screen -r nmearx
Yes,
Data is getting to the Pi,. But it looks like there’s an issue with the NMEA stream
Is it in this format:
$GPRMC,hhmmss.ss,A,xxxx.xxxx,a,yyyyy.yyyy,a,x.x,x.x,ddmmyy,x.x,a*hh
The error in the terminal indicates a checksum issue
I think that’s a Linux thing. My weak point. I think if you hit ctrl-x and exit, then open the window again. It should work.
???
the first screen -r nmearx was with $GPGGA
and then i changed it to $GPRMC to see if it made any difference ,
i was advised to use the GPGGA data format to send the transponder position by tritech
my NMEA router settings
$GPRMC data format going through my router
It looks like the checksum is not right?
I’m used to seeing something like “A*43” as a checksum format. not just “*73” like you have.
Hopefully someone else in this forum can advise…
HI thanks for all your help and assistance , i hope that maybe the BR technician will be able to advise me on the correct setting tomorrow when they get back to work
Hi!
@Mac1 can you paste some lines in this online NMEA checksum tester to verify the checksums?
hello william,
I opened the online check sum calculator page , but cannot see how it runs , what do i click on to see the data ,what lines do i paste ?
sorry for not understanding
just pasting the line in the text field and pressing enter/tab.
The checksum does look wrong (or perhaps I wrote something wrong, and I typed that in manually).
