How can i send Moitessier GPS data via NMEA USB stick?

Colin Glover replied 3 years ago

Hey guys, I have Moitessier 2 in my Pi4 running the current Moitessier Openplotter build. I have purchased a USB NMEA 0183 and have loaded the drivers.

How do i output the Moitessier GPS to other devices over NMEA 0183?

I have tried many options, utilising SignalK, Serial and OPENCPN and cant get this working. I’m running cat command against the USB interface but haven’t seen a single message yet.

my current setup:
Raspberry pi4
Moitessier hat 2
Openplotter lates version
Opencpn 5.2.4
FTDI USB nmea 0183 TX/RX stick
I’m trying to output GPS/GNSS from the Moitessier hat to nmea 0183 using the USB stick to my VHF radio that has nmea0183 input
in Openplotter Serial setup:
device ttyUSB0
alias ttyOP_nmea
data nmea 0183
connection SignalK
id nmea
baud 38400
in Opencpn connections setup:
type Network
Direction Output
Protocol UDP
Network address 0.0.0.0
Network Port 10119
Priority 1
type Network
Direction Input
Protocol Signal K
Network address local host
Network port 3000
Priority 1
type Network
Direction Output
Protocol UDP
Network address 0.0.0.0
Network port 10110
Priority 1
type Network
Direction In/Out
Protocol UDP
Network address 0.0.0.0
Network port 10119
Priority 1
Signal K config
ID opencpnOUT
data type nmea0183
NMEA0183 Source UDP
Port 10119
Sentence Event nmea0183out
ID nmea
data type nmea0183
NMEA0183 Source Serial
Serial port /dev/ttyOP_nmea
Baud rate 4800
Output Events nmea0183out
Sentence Event nmea0183out
the VHF radio says “no gps signal”
When i run ‘cat /dev/ttyOP_nmea’ i get no output reported (same on cat /dev/ttyUSB0
I think i’ve followed instructions in OpenPlotter, OpenCPN and Moitessier and can’t see what i’m doing wrong.
Any help greatly appreciated
Thanks
Colin