Using a Yaesu FT4X, i make a little isolated interface for my CM108 USB soundcard.
I use this setup for the APRS network with a Raspberry pi and Direwolf software.
Don't forget to open the squech of the FT4X (squelch allways open on APRS !)
-> push Fonction then MONI/CALL, and set OFF
Direwolf source and installation :
https://github.com/wb2osz/direwolf
https://github.com/wb2osz/direwolf
start direwolf on raspberry py, the good way :
To see APRS data on a console :
xastir AGWPE, and map configuration: