1-2000 OpenCPN Deltas
I have been having stability issues then I noticed that I had about 100 deltas until I navigated somewhere, then I had literally 1000’s. I have a filter set to only transmit certain sentences but that is being ignored, I tried to reverse it but the drop filter also isn’t working. I can do it at the SignalK connection but has anyone else seen this issue?
6 Replies
The filter is working but we are filtering to APB, RMB, and XTE, which is 13 different Deltas but the frequency of the data must be around 10ms in order to get to the number of deltas per second we are seeing.
Signal K logs shows the APB, RMB and XTE sentences arriving at very high frequency. there is 6ms between APB sentence timestamps
do you have a loop? are you outputting something that gets handled as input?
yes, I am not sure what changed, my setup has always been input (to OpenCPN) via TCP, localhost port 10110 and output from OpenCPN via UDP, localhost port 10111 but only sending APB, XTE and RMB. just recently, the traffic has spiked and these sentences are being sent out on port 10110, however they are not selected in the plugin Signal K to NMEA0183 which I thought was responsible for what is sent back out? Anyway, for now I have added a filter to OpenCPN input to screen out APB, RMB and XTE and the OpenCPN Connection traffic dropped from 1-2K to <10
All incoming 0183 data is sent out over TCP 10110
Not just generated 0183 data
High delta rate but still somewhat usable system indicates a system with a lossy loop - in your case UDP that is dropping some of the data when it gets overwhelmed. At least that is how i see it..
OK, so all native 0183 data goes out on TCP 10110? not sure why I didn't see this issue in the past but the screen on the TCP 10110 had the desired effect