Version 1.2

Version 1.2 -- June 2015

New Features

• Improved decoder performance.
  Over 1000 error-free frames decoded from WA8LMF TNC Test CD.
  See "A-Better-APRS-Packet-Demodulator.pdf" for details.
• Up to 3 soundcards and 6 radio channels can be handled at the same time.
• New framework for applications which listen for Touch Tone commands
  and respond with voice. A sample calculator application is included
  as a starting point for building more interesting applications.
  For example, if it hears the DTMF sequence "2_3_4#" it will respond
  with the spoken words "Twenty Four."
• Reduced latency for transfers to/from soundcards.
• More accurate transmit PTT timing.
• Packet filtering for digipeater and IGate.
• New command line -q (quiet) option to suppress some types of output.
• Attempted fixing of corrupted bits now works for 9600 baud.
• Implemented AGW network protocol 'y' message so applications can
  throttle generation of packets when sending a large file.
• When using serial port RTS/DTR to activate transmitter, the two
  control lines can now be driven with opposite polarity as required
  by some interfaces.
• Data Carrier Detect (DCD) can be sent to an output line (just
  like PTT) to activate a carrier detect light.
• Linux "man" pages for on-line documentation.
• AGWPORT and KISSPORT can be set to 0 to disable the interfaces.
• APRStt gateway enhancements: MGRS/USNG coordinates, new APRStt3
  format call, satellite grid squares.

Bugs fixed

• Fixed "gen_packets" so it now handles user-specified messages correctly.
• Under some circumstances PTT would be held on long after the transmit
  audio was finished.

Known problems

• Sometimes writes to a pseudo terminal will block causing the received
  frame processing thread to hang. The first thing you will notice is that
  received frames are not being printed. After a while this message will appear:

  Received frame queue is out of control. Length=... Reader thread is probably
  frozen. This can be caused by using a pseudo terminal (direwolf -p) where
  another application is not reading the frames from the other side.

Version 1.1

Version 1.1 -- December 2014

New Features

• Logging of received packets and utility to convert log file
  into GPX format.
• AGW network port formerly allowed only one connection at a
  time. It can now accept 3 client applications at the same time.
  (Same has not yet been done for network KISS port.)
• Frequency / offset / tone standard formats are now recognized.
  Non-standard attempts, in the comment, are often detected and
  a message suggests the correct format.
• Telemetry is now recognized. Messages are printed for
  usage that does not adhere to the published standard.
• Tracker function transmits location from GPS position.
  New configuration file options: TBEACON and SMARTBEACONING.
  (For Linux only. Warning - has not been well tested.)
• Experimental packet regeneration feature for HF use.
  Will be documented later if proves to be useful...
• Several enhancements for trying to fix incorrect CRC:
  Additional types of attempts to fix a bad CRC.
  Optimized code to reduce execution time.
  Improved detection of duplicate packets from different fixup attempts.
  Set limit on number of packets in fix up later queue.
• Beacon positions can be specified in either latitude / longitude
  or UTM coordinates.
• It is still highly recommended, but no longer mandatory, that
  beaconing be enabled for digipeating to work.
• Bugs fixed:
• For Windows version, maximum serial port was COM9.
  It is now possible to use COM10 and higher.
• Fixed issue with KISS protocol decoder state that showed up
  only with "binary" data in packets (e.g. RMS Express).
• An extra 00 byte was being appended to packets from AGW
  network protocol 'K' messages.
• Invalid data from an AGW client application could cause an
  application crash.
• OSS (audio interface for non-Linux versions of Unix) should
  be better now.

Known problems

• Sometimes kissattach fails to connect with "direwolf -p".
  The User Guide and Raspberry Pi APRS document have a couple work-arounds.

Version 1.0

Version 1.0 -- May 2014

New Features

• Received audio can be obtained with a UDP socket or stdin.
  This can be used to take audio from software defined radios
  such as rtl_fm or gqrx.
• 9600 baud data rate.
• New PBEACON and OBEACON configuration options. Previously
  it was necessary to handcraft beacons.
• Less CPU power required for 300 baud. This is important
  if you want to run a bunch of decoders at the same time
  to tolerate off-frequency HF SSB signals.
• Improved support for UTF-8 character set.
• Improved troubleshooting display for APRStt macros.
• In earlier versions, the DTMF decoder was always active because it
  took a negligible amount of CPU time. Unfortunately this sometimes
  resulted in too many false positives from some other types of digital
  transmissions heard on HF. Starting in version 1.0, the DTMF decoder
  is enabled only when the APRStt gateway is configured.