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The primary medium for chat is Matrix, it can be accessed with a web browser or a separate app such as Element.

If possible, please join using an existing Matrix account or sign-up for an account on one of the public servers.

GNU Radio does host a server, but it costs per-user for people who sign up directly.

If you are using an app that asks for the Matrix homeserver URL should work. If that doesn't work use:

To join the main channel directly, use or search for rooms (eg, in the Element clients), using as a server name.

The IRC #gnuradio and #gnuradio-dev channels (see below) have two way connections to the Matrix and channels if you prefer using that user interface.

We have many other channels on Matrix, including channels for GNU Radio-related Amateur Radio discussion, GNU Radio in Education, VOLK, … . They are not bridged to IRC.

IRC Bridge[edit]

GNU Radio has several channels on the network where people talk about GNU Radio related topics. GNU Radio has moved away from the Freenode network due to a change in network management and we are only on Libera. The Matrix channel bridging will be with the Libera channels.

#gnuradio is the official general project chat. Anything GNU Radio, SDR, and DSP related is welcome.

#gnuradio-dev is used for conversations and questions around the development of the code of GNU Radio itself.

A useful guide for Libera is the IRC commands cheat sheet.

Basic Etiquette in #gnuradio[edit]

If you have never used IRC before, going here can be quite daunting and even intimidating. Veteran IRC users might seem unfriendly at times, but this is usually because of etiquette and customs typical to IRC channels.

Generally, if you've not used IRC before, it's likely you'll want to directly use Matrix (again, we've made sure the same channel can be seen from both Matrix and IRC).

Some basic guidelines when going to #gnuradio for help:

  • Just ask – New users often make the mistake of asking "Is anyone in here?", which is typically ignored (because you already know there's someone there by viewing the list of people in the channel). Briefly explain your problem, and don't wait for permission to ask.
  • Don't expect immediate answers, but do hang around for a few hours, at least. People live in different timezones, and don't always watch their chat window. It is considered impolite to ask a question, and then disconnect after a short while if there was no answer.
  • The guidelines on ReportingErrors still apply, although the nature of IRC means you have to condense your questions, and the direct feedback means you can discuss this in dialog.
  • It often happens that discussions go off on a tangent, and suddenly a lot of people participate in discussions that can range from philosophical, across absurd to highly technical. This is just how such chats works. Don't be afraid to participate. Of course, you might not be getting the answer you want because of those discussions, but there's a high chance that people will still have noticed you.
  • Of course, any rude or inappropriate behaviour is met by a ban. We want this to be a friendly place.
  • If in doubt about what is not in order, see our Code of Conduct.