https://livesys.se/tags/zeromq/ Recent content in ZeroMQ on Living Systems_ Hugo en-us Wed, 13 Nov 2019 11:56:00 +0100 https://livesys.se/posts/pub-sub-with-zeromq-in-python/ Wed, 13 Nov 2019 11:56:00 +0100 https://livesys.se/posts/pub-sub-with-zeromq-in-python/ <p><a href="https://zeromq.org" target="_blank" rel="noopener">ZeroMQ</a> is a great way to quickly and simply send messages between multiple programs running on the same or different computers. It is very simple and robust since it doesn&rsquo;t need any central server. Instead it talks directly between the programs through sockets, TCP-connections or similar.</p> <p>ZeroMQ has client libraries for basically all commonly used programming languages, but when testing out that a connection works between e.g. two different machines, it might be good to keep things simple and test just the connection, as simply as possible. For this purpose, I have came to use the following two python scripts, where one sets up a &ldquo;publisher&rdquo;, and the other a &ldquo;subscriber&rdquo; process. I&rsquo;m documenting them here since I tend to forget the syntax from time to time, and also some details, such as that you have to make sure the subscriber subscribes to one or all topics.</p>