In this video I show you how to write a simple MQTT client, which will publish a message under the topic test/t1. Here is a link to the sources of my MQTT client: https://github.com/Johannes4Linux/libmosquitto_examples You want to support my work? You can buy me a coffee here: https://www.buymeacoffee.com/johannes4linux Here is a list of free and open source software I have used for this video: - mosquitto: https://mosquitto.org/ - gcc: https://gcc.gnu.org/ - i3wm (https://i3wm.org/) with i3blocks (https://github.com/vivien/i3blocks) - vim: https://www.vim.org/ - urxvt: http://software.schmorp.de/pkg/rxvt-unicode.html - SimpleScreenRecorder: https://www.maartenbaert.be/simplescreenrecorder/