If you run DireWolf from a terminal window, it should print out several lines of text describing each received packet as they come in. So, you need to confirm you're actually getting audio into the sound port you are listening to.
You might want to try installing a program called audacity. It's an audio editing package useful for musicians, theatre technicians, and others who process sound, but it's also a convenient way to ensure you're actually getting audio into your computer. Have it recording the input from the UDRC card and confirm that when you hear packets on the radio's speaker, you see the corresponding envelope growth on the Audacity oscilloscope graph. That way, you can confirm you're configuring DireWolf to listen and transmit on the correct audio port.
As for getting data to aprs.fi, that won't happen until you have an I-gate connection to the APRS-IS backbone with a valid passcode (so you're allowed to forward the packets to the APRS-IS). Either DireWolf or YAAC can do the I-gating function. You might want to join the DireWolf mailing list (
[email protected]) or NW Digital Radio's udrc mailing list (
[email protected]) to ask them for more information.
