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Dire Wolf is a software soundcard modem 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, and many others.

This article provides an overview of setup Direwolf and QtTermTCP for HF packet radio operations. It covers important tasks such as setting up a Direwolf TNC, connecting with stations, and engaging in packet-based chat (K2K). It also looks at how to use nodes as relays and access basic BBS services. The paper also includes HF packet network etiquette recommendations and a description of how to handle common packet transmission issues, making it a useful resource for amateur radio enthusiasts.

GDX is a free Linux DX Cluster client for Radio amateurs. It allows hamradio operators to connect to the Packet Radio DX Clusters network via telnet. Connection via radio frequency modem, or TNC, not available at the moment.

The RNode Firmware is an open and flexible firmware and bootstrapping system for creating RNode devices. An RNode is an open, free, and unrestricted digital radio transceiver designed for sending and receiving data over various distances, particularly well-suited for Reticulum. It supports uses such as a network adapter for Reticulum, messaging with Sideband, information sharing via Nomad Network, a LoRa-based KISS-compatible amateur radio TNC, a LoRa development platform, a packet sniffer for LoRa networks, a long-range Ethernet and IP network interface on Linux, and a general-purpose long-range data radio. The firmware supports Handheld v2.x and v1.x RNodes from unsigned.io, LilyGO T-Beam v1.1, LilyGO LoRa32 v2.0, LilyGO LoRa32 v2.1, and Heltec LoRa32 v2 devices. It is compatible with transceiver modules based on Semtech SX1276, SX1278, SX1262, SX1268, and SX1280 chips with SPI interfaces and exposed interrupt pins. Firmware installation is managed via the rnodeconf utility, included in the rns package.