You WROTE

It turns out that I've been able to send a lot of my NMEA data over
WiFi without purchasing any hardware at all (assuming you've got an
extra lap top laying around). The trick is something called OpenCPN
software which is nominally a charting program but in reality has
become much more. OpenCPN has the ability to establish network
connections, both inbound and outbound. By using an old laptop to
take in all of my NMEA data on serial ports (GPS data from the chart
plotter and AIS data from the VHF radio), I can then send the data
back out over the WiFi network by doing a UDP broadcast to TCP/IP
address 192.168.0.255:1. Any other computer on the boat can receive
that datastream on the same IP address and port number so I can have
multiple computers at different locations displaying and processing
navigation data.


This is very interresting !
I can not succed to do that. When the PC is connected with cable it works but not when is only connected with WIFI to a local network
Can you tell us more about the configuration of the clients and the configurations of the server both on opencpn parameters and wiindows parameters
Thanks for help
Gilles