Direwolf afsk, I haven't tried it yet, but a couple of us just today started experimenting with Direwolf/Soundmodem modes to see if any of them perform better than standard AFSK 300bd, sending APRS messages (with acks) on HF. May 6, 2025 · Key Components Description Demodulators Dire Wolf implements multiple modems to handle different types of radio signals: AFSK Modem: Used for 300 and 1200 baud packet, primarily on VHF/UHF PSK Modem: For 2400 and 4800 baud packet, offering better performance in some conditions G3RUH/GMSK Modem: For 9600 baud and higher (up to 38400 baud) packet Mar 27, 2024 · Packet, also known as FSK300, AFSK1200, BPSK300, QPSK600, BPSK1200, QPSK2400, AX. Dire Wolf can support multiple audio channels which correspond to a physical audio interface, a virtual audio pipe, stdin (receive only), or a UDP port (receive only). 25, IL2P, AIS, EAS SAME). However, with the RTL2832U, the audio is already digitized. . It can be used stand-alone to observe APRS traffic, as a tracker, digipeater, APRStt gateway, or Internet Gateway (IGate). com から最新コードをcloneしてmakeするように書かれています。 The modern day AFSK decoder such as UZ7HO Soundmodem, QtSoundModem and Direwolf is capable of running multiple parallel decoders that are tuned a few tens of Hertz above and below the main decoder center frequency. rtl_fm -M fm -f 434850000 -s 22050 | direwolf -n 1 -r 22050 -b 16 - Which can be seen below. Dire Wolf is a software "soundcard" AX. This example confirms that the generated APRS/AFSK signal indeed correct and decodeable. So far all we've tried is BPSK 600bd with FX25 and single-bit recovery enabled, and it seems noticeably better than AFSK 300bd. It can be used stand-alone to observe APRS traffic, as a tracker, digipeater, APRStt gateway, or Internet Gateway (IGate) Direwolf is a program that converts digital data into AFSK audio and therefore it needs to know where to send those sounds. Aug 13, 2024 · IC-705 + dire wolf でUIフレームを受信する 想定環境 PC側の準備 software TNCとして、 Direwolf を利用します。 公式ページでは github. 25 packet modem/TNC and APRS encoder/decoder. g if you want to feed 1200bps to the 9600bps flat audio input of your transceiver. Apr 30, 2009 · I was able to look back into this on Friday night and get DireWolf to work as a drop in replacement for Multimon-ng. 25 and HDLC computer network protocols. Jan 28, 2023 · Direwolf is very capable software TNC, yet it is not yet possible to add twist between the high and low tone e. Each of these channels is configured to have its own modem (AFSK, GMSK, PSK) and framing type (AX. 25, FX. Packet radio is a synchronous system in which data is transmitted in frames. 25 and IL2P, is a packet based protocol derived from X. Here are some examples where the generated APRS/AFSK signal is decoded using GNU Radio and direwolf. This how-to focuses on Linux, however similar methods will work on other operating systems. Direwolf Dire Wolf is a software “soundcard” AX. So I'm able to listen with rtl_fm and pipe that into DireWolf to decode the APRS packets with the following command. The objective is to be able to decode standard 1200 baud AFSK APRS packets using the network access from the IC-9700 and wfview’s audio.
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