Provided by: direwolf_1.4+dfsg-1build1_amd64
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 others.
-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. g = GPS interface. W = Waypoints for position or object reports. t = Tracker beacon. o = Output controls such as PTT and DCD. i = IGate h = Hamlib verbose level. Repeat for more. -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. -S Print Symbol tables and exit. -a n Report audio device statistics each n seconds.
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 -
More detailed information is in the pdf files in /usr/local/share/doc/direwolf, or possibly /usr/share/doc/direwolf, depending on installation location. Applications in this package: aclients, atest, decode_aprs, direwolf, gen_packets, ll2utm, log2gpx, text2tt, tt2text, utm2ll DIREWOLF(1)