Hello Atomsky,


atomsky>>tests receiving GPS sentences and displaying them on the LCD and sending them serially to the PC, but I'm not sure how to write the code for over-the-air encoding in APRS (AX25) amateur radio protocol... Ideas?<<

If you had the format of the protocal, that is 50 percent of it... the other 50 percent is having a transmitter and receiver that receives the protocall.

Stick a triggered scope to the output and let it transmit a known bit of data. From there, you can make the transmit behave anyway you want.

sounds like a fun project to do...

Dwayne