Hmmm... How are you doing the Push-To-Talk hookup between your radio and DireWolf? It sounds like YAAC's use of the RXTX library, in the process of searching for available serial ports for possible Serial_TNC, Serial_GPS, and Serial_Weather connections, is changing the flow control signals on the port being used by DireWolf.
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I have the following problem with beta55 maybe with previous releases also, but haven't checked.
Start direwolf
Start YAAC
Go File->Configure->Expert->Ports
Press "Add"
PTT is "pressed" and stays on until you exit YAAC and direwolf
Sellect AGWPE, Save, Exit
Exit YAAC and direwolf
start direwofl and YAAC, and everything is working correctly!!!
Hmmm... How are you doing the Push-To-Talk hookup between your radio and DireWolf? It sounds like YAAC's use of the RXTX library, in the process of searching for available serial ports for possible Serial_TNC, Serial_GPS, and Serial_Weather connections, is changing the flow control signals on the port being used by DireWolf.