Interact with APRS-IS servers. Send/receive APRS messages. Parse APRS packets.

APRS-IS requires a callsign and a passcode. In order to send messages on the APRS network, you must be a licensed amateur radio operator with a valid callsign. You will also need a passcode generated if you intend to send messages over the radio. If you just want to listen in on packets, you don't need to provide a passcode.

This app expects the above secrets to be provided via two environment variables:

export APRS_CALLSIGN = "YOUR CALLSIGN"
export APRS_PASSCODE = "YOUR PASSCODE"

or

APRS_CALLSIGN=FOO APRS_PASSCODE=BAR iex -S mix

On startup, the app will login to the APRS-IS system and you should start seeing packets flow in.

Make sure you update the APRS filter in config.exs, as this controls what packets you see. If you don't, you'll get whatever default filter I happened to leave in the config.exs file last time I pushed code.