An APRS library for the Arduino IDE
LibAPRS is an Arduino IDE library that makes it easy to send and receive APRS packets with a MicroModem-compatible modem.
See the example included in the library for info on how to use it!
You should read through the "Basic_usage" example included with the library. It contains an explanation of all the functions and a basic sketch to get you up and running with sending and receiving packets.
This library is very early, and being actively developed all the time. This means you should expect to find bugs. If you do, please report them here, so I can fix them! It also means I might have to make changes that will break code, and that you will have to rewrite your sketch. If you don't think that sounds good, wait a little while for a stable release of the library :)