2022-07-16, 08:33 AM
First of all: when asking a question about a commercial product it would help a lot if you include pointers to the product's online documentation or product info.
Quick googling does not find anything about Cortex and UDP, just TCP.
On to the real answer: there is no one established method for NMEA2000 over TCP, UDP or serial connections. Manufacturers use their own proprietary formats and there are several ways ($PCDIN, $MXPGN, !PDGY) to encapsulate NMEA2000 data in a NMEA0183 network/serial stream.
My guess is that Cortex uses one of these to broadcast all of its sensor data as well as data from the network.
Signal K server can decode the N2K data in a NMEA0183 stream, but since the data is technically NMEA 0183 you'll need to create the connection as a NMEA 0183 connection. A bit confusing.
FYI for the time being SK does not support NMEA 2000 2 way communication over UDP, meaning you won't be able to send anything to your N2K network from SK with that.
Quick googling does not find anything about Cortex and UDP, just TCP.
On to the real answer: there is no one established method for NMEA2000 over TCP, UDP or serial connections. Manufacturers use their own proprietary formats and there are several ways ($PCDIN, $MXPGN, !PDGY) to encapsulate NMEA2000 data in a NMEA0183 network/serial stream.
My guess is that Cortex uses one of these to broadcast all of its sensor data as well as data from the network.
Signal K server can decode the N2K data in a NMEA0183 stream, but since the data is technically NMEA 0183 you'll need to create the connection as a NMEA 0183 connection. A bit confusing.
FYI for the time being SK does not support NMEA 2000 2 way communication over UDP, meaning you won't be able to send anything to your N2K network from SK with that.