Okay, understood. Thanks very much for the help. I'm not sure nmea0183 to nmea0183 would work in this case, because my problem is with the same string (HDM) coming from two different devices and one of the strings being wrong. I only want to filter from a single device.
I'll use KPLEX and a different port. I guess now I'll need to create a KPLEX port that will send NMEA0183 to SignalK and another port that will send to a TCP port?
I'll use KPLEX and a different port. I guess now I'll need to create a KPLEX port that will send NMEA0183 to SignalK and another port that will send to a TCP port?