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Greg Albrecht
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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.


  • 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.


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')


Example 1 Output


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')



Run nosetests from a Makefile target:

make test


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 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






Greg Albrecht W2GMD


Copyright 2017 Greg Albrecht and Contributors

Automatic Packet Reporting System (APRS) is Copyright Bob Bruninga WB4APR - Copyright (c) 2013 Christopher H. Casebeer. All rights reserved. - Copyright (C) 2006-2013 by Mateusz Łoskot <>


Apache License, Version 2.0. See LICENSE for details. - BSD 2-clause Simplified License - BSD 3-clause License

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