Transport serial port over network
The other end may be provided by ser2net
socat -d -d pty,link=/dev/ttyUSB99,echo=0,perm=0777 TCP4-CONNECT:192.168.0.254:5000
Emulate two connected serial ports
socat -d -d pty,link=/dev/ttyUSB98,echo=0,perm=0777 pty,link=/dev/ttyUSB99,echo=0,perm=0777
Some multicast examples here: https://blog.danman.eu/using-socat-for-multicast-receiving-and-proxying/
