aprs - Python APRS Module

aprs is a Python Module that supports connecting to APRS Interfaces, and receiving, parsing and sending APRS Frames.

Included are several Interface Classes:

• APRS - Abstract Class from which all other Connection Interfaces are inherited.
• TCP - Connection Interface Class for connecting to APRS-IS via TCP. Can send or receive APRS Frames.
• UDP - Connection Interface Class for connecting to APRS-IS via UDP. Only supports sending APRS Frames.
• HTTP - Connection Interface Class for connecting to APRS-IS via HTTP. Currently only supports sending APRS Frames.

Frame and Callsign classes are included:

• Frame - Describes the components of an APRS Frame.
• Callsign - Describes the components of an APRS Callsign.

Versions

• 6.5.x branch will be the last version of this Module that supports Python 2.7.x
• 7.x.x branch and-on will be Python 3.x ONLY.

Installation

Install from pypi using pip: pip install aprs

Usage Examples

Example 1: Library Usage - Receive

The following example connects to APRS-IS as W2GMD (me!) and filters for APRS frames coming from my prefix (W2GMD, W2GMD-n, etc). Any frames returned are sent to my callback p and printed.

Example 1 Code

import aprs

def p(x): print(x)

a = aprs.TCP('W2GMD', '12345')
a.start()

a.receive(callback=p)

Example 1 Output

W2GMD-6>APRX28,TCPIP*,qAC,APRSFI-I1:T#471,7.5,34.7,37.0,1.0,137.0,00000000

Example 2: Library Usage - Send

The following example connects to APRS-IS as W2GMD (me!) and sends an APRS frame.

Example 2 Code

import aprs

frame = aprs.parse_frame('W2GMD>APRS:>Hello World!')

a = aprs.TCP('W2GMD', '12345')
a.start()

a.send(frame)

Testing

Run nosetests from a Makefile target:

make test

Errata

7.0.0rc1 - Currently setting/getting digi flag on KISS frames is broken. Expect it to be fixed in final release of 7.0.0.

See Also

• Python KISS Module Library for interfacing-to and encoding-for various KISS Interfaces.
• Python APRS Module Library for sending, receiving and parsing APRS Frames to and from multiple Interfaces
• Python APRS Gateway Uses Redis PubSub to run a multi-interface APRS Gateway.
• Python APRS Tracker TK.
• dirus Dirus is a daemon for managing a SDR to Dire Wolf interface. Manifests that interface as a KISS TCP port.

Similar Projects

• apex by Jeffrey Phillips Freeman (WI2ARD). Next-Gen APRS Protocol. (based on this Module! :)
• aprslib by Rossen Georgiev. A Python APRS Library with build-in parsers for several Frame types.
• aprx by Matti & Kenneth. A C-based Digi/IGate Software for POSIX platforms.
• dixprs by HA5DI. A Python APRS project with KISS, digipeater, et al., support.
• APRSDroid by GE0RG. A Java/Scala Android APRS App.
• YAAC by KA2DDO. A Java APRS Client.
• Ham-APRS-FAP by aprs.fi: A Perl APRS Parser.
• Dire Wolf by WB2OSZ. A C-Based Soft-TNC for interfacing with sound cards. Can present as a KISS interface!

Build Status

Master:

Develop:

Source

Github: https://github.com/ampledata/aprs

Author

Greg Albrecht W2GMD oss@undef.net

http://ampledata.org/

Copyright

Copyright 2017 Greg Albrecht and Contributors

Automatic Packet Reporting System (APRS) is Copyright Bob Bruninga WB4APR wb4apr@amsat.org

fcs.py - Copyright (c) 2013 Christopher H. Casebeer. All rights reserved.

decimaldegrees.py - Copyright (C) 2006-2013 by Mateusz Łoskot <mateusz@loskot.net>

License

Apache License, Version 2.0. See LICENSE for details.

fcs.py - BSD 2-clause Simplified License

decimaldegrees.py - BSD 3-clause License