SignalK receiving SK data via TCP not working

[tooltrader]

I have an operational SK system running on a RP-4. It is networked via wifi. I also have a NMEA Simulator running on a separate Mac which connects to the PI and can interact with it via VNC. With the simulator, I can successfully send NMEA0183 data to the signalK via TCP on 10110. I would like to send SK data from the simulator instead of 0183. I have the simulator set to TCP client at the correct RP-4 address on port 8375 and have created a data source of TCP / SK data on the signalK server listening on port 8375. I can see the simulator sending out messages but I see nothing received on the signalk server. Debug logs show nothing also. I can see the TCP port listener on the RP-4 via netstat also. What am I missing here?

[tkurki]

There should be debug key signalk:streams:tcp-data to activate in Server Log. It should log all raw tcp data received, prior to parsing the input.

Can your simulator send UDP? If yes try that.

[tooltrader]

Good suggestions. Yes, sim can send UDP. I tried that on the same port with no improvement. As an experiment, I changed the sim to send 0183 data on the TCP port 8375 and saw lots of complaints in the signalk logs about the "!" and "$" characters so this implies that some data is reaching the server but it simply will not process the data as signalk. I tried the log debug key but no additional info is logged. Note that I am listening on localhost for the TCP data connection from the server. This could, of course be a problem with my simulator when in signalk out mode. I suppose I need to start sniffing for packets on the RP-4 side.

[tooltrader]

Ok, after some packet sniffing, it is clear that the simulator is the fault here. While it has a configuration to transmit SignalK data, it doesnt do it and simply sends nothing. ah... so unfortunate.

[tooltrader]

Finally got UDP working fine.