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direwolf - Online in the Cloud

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This is the command direwolf that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



direwolf - Soundcard TNC for packet radio.


direwolf [ options ] [ - | udp:9999 ]

The first audio channel can be streamed thru stdin or a UDP port. This is typically used
with an SDR receiver.


direwolf is a software "soundcard" modem/TNC and APRS encoder/decoder. It can be used
stand-alone to receive APRS messages, as a digipeater, APRStt gateway, or Internet Gateway
(IGate). It can also be used as a virtual TNC for other applications such as APRSIS32,
UI-View32, Xastir, APRS-TW, YAAC, UISS, Linux AX25, SARTrack, RMS Express, and many


-c file
Read configuration file from specified location rather than the default locations.

-l dir Generate log files in specified directory. Use "." for current directory.

-r n Audio sample rate per second for first channel. Default 44100.

-n n Number of audio channels for first device. 1 or 2. Default 1.

-b n Audio sample size for first channel. 8 or 16. Default 16.

-B n Data rate in bits/sec for first channel. Standard values are 300, 1200, 9600.
If < 600, tones are set to 1600 & 1800.
If > 2400, K9NG/G3RUH scrambling is used.
Otherwise, AFSK tones are set to 1200 & 2200.

-D n Divide audio sample by n for first channel.

-d x Debug options. Specify one or more of the following in place of x.
a = AGWPE network protocol client.
k = KISS serial port client.
n = Network KISS client.
u = Display non-ASCII text in hexadecimal.
p = Packet dump in hexadecimal.
t = GPS Tracker.
o = Output controls such as PTT and DCD.

-q x Quiet (suppress output). Specify one or more of the following in place of x.
h = Heard line with the audio level.
d = Decoding of APRS packets.

-t n Text colors. 1=normal, 0=disabled.

-p Enable pseudo terminal for KISS protocol.

-x Send Xmit level calibration tones.

-U Print UTF-8 test string and exit.


gqrx (2.3 and later) has the ability to send streaming audio through a UDP socket to
another application for further processing. direwolf can listen over a UDP port with
options like this:

direwolf -n 1 -r 48000 -b 16 udp:7355

Other SDR applications might produce audio on stdout so it is convenient to pipe into the
next application. In this example, the final "-" means read from stdin.

rtl_fm -f 144.39M -o 4 - | direwolf -n 1 -r 24000 -b 16 -

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