Library to generate Bell 202 AFSK audio samples and AFSK encoded APRS/AX.25 packets.
The aprs command line program encodes APRS packets as AFSK audio data.
Install with pip:
$ pip install afsk
$ pip install pyaudioPyAudio is optional, so must be installed separately.
If you want to use the CLI program to play APRS packets via your soundcard, install PyAudio. Otherwise, if you just want to generate Wave files of AFSK data, you can skip it.
For development, change to the afsk directory and install with:
$ pip install -r requirements.txt
$ python setup.py developRequires Python 2.6 or 2.7.
Generate APRS messages with the aprs CLI program:
$ aprs --callsign <your callsign> ":EMAIL :test@example.com Test email"Specify your message body with INFO command line argument. Be sure to wrap the message in quotes so it's passed as one argument, spaces includd.
At the moment, no message formats are implemented in the aprs program; you must construct the body string yourself. For instance, in the example above, the string passed as an argument to aprs follows the email messsage format specified for APRS.
You must specify your amateur radio callsign with the --callsign or -c flags.
Use the --output option to write audio to a Wave file (use '-' for STDOUT) rather than play over the soundcard.
Get a listing of other options with aprs --help.