.TH DIREWOLF 1 .SH NAME direwolf \- Soundcard TNC for packet radio. .SH SYNOPSIS .B direwolf [ \fIoptions\fR ] [ \- | \fBudp:\fR9999 ] .P The first audio channel can be streamed thru stdin or a UDP port. This is typically used with an SDR receiver. .SH DESCRIPTION \fBdirewolf\fR 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. .SH OPTIONS .TP .BI "-c " "file" Read configuration file from specified location rather than the default locations. .TP .BI "-l " "dir" Generate log files in specified directory. Use "." for current directory. .TP .BI "-r " "n" Audio sample rate per second for first channel. Default 44100. .TP .BI "-n " "n" Number of audio channels for first device. 1 or 2. Default 1. .TP .BI "-b " "n" Audio sample size for first channel. 8 or 16. Default 16. .TP .BI "-B " "n" Data rate in bits/sec for first channel. Standard values are 300, 1200, 9600. .PD 0 .RS .RS If < 600, tones are set to 1600 & 1800. .P If > 2400, K9NG/G3RUH scrambling is used. .P Otherwise, AFSK tones are set to 1200 & 2200. .RE .RE .PD .TP .BI "-D " "n" Divide audio sample by n for first channel. .TP .BI "-d " "x" Debug options. Specify one or more of the following in place of x. .PD 0 .RS .RS a = AGWPE network protocol client. .P k = KISS serial port client. .P n = Network KISS client. .P u = Display non-ASCII text in hexadecimal. .P p = Packet dump in hexadecimal. .P g = GPS interface. .P W = Waypoints for position or object reports. .P t = Tracker beacon. .P o = Output controls such as PTT and DCD. .P i = IGate .P h = Hamlib verbose level. Repeat for more. .RE .RE .PD .TP .BI "-q " "x" Quiet (suppress output). Specify one or more of the following in place of x. .PD 0 .RS .RS h = Heard line with the audio level. .P d = Decoding of APRS packets. .RE .RE .PD .TP .BI "-t " "n" Text colors. 1=normal, 0=disabled. .TP .B "-p " Enable pseudo terminal for KISS protocol. .TP .B "-x " Send Xmit level calibration tones. .TP .B "-U " Print UTF-8 test string and exit. .TP .B "-S " Print Symbol tables and exit. .TP .BI "-a " "n" Report audio device statistics each n seconds. .SH EXAMPLES 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: .RS .P direwolf -n 1 -r 48000 -b 16 udp:7355 .RE .P 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. .RS .P rtl_fm -f 144.39M -o 4 - | direwolf -n 1 -r 24000 -b 16 - .RE .SH SEE ALSO 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