Mosquitto is an open-source, lightweight MQTT (Message Queuing Telemetry Transport) broker. MQTT is a lightweight messaging protocol based on the publish/subscribe model, ideal for IoT devices and low-bandwidth environments.
Installing Mosquitto on Ubuntu / Debian
sudo apt update
sudo apt install -y mosquitto
After installation, Mosquitto will start as a service by default. Use the following commands to check its status:
sudo systemctl enable mosquitto
sudo systemctl start mosquitto
sudo systemctl status mosquitto # Check the service status
Testing the Server Setup with MQTT-Explorer
Download MQTT-Explorer: https://mqtt-explorer.com/
Enter the server address:
As shown, the topics are the subjects published via MQTT. On the left panel, you can see all topics and their messages.