In this chapter, we will start our journey toward using the preferred IoT publish-subscribe lightweight messaging protocol in diverse IoT solutions, combined with mobile apps and web applications. We will learn how MQTT and its lightweight messaging system work.
We will understand the MQTT puzzle: clients, servers (formerly known as brokers), and connections. We will learn the procedures to install an MQTT 3.1.1 Mosquitto server in Linux, macOS, and Windows. We will learn special considerations for running a Mosquitto server in the cloud (Azure, AWS, and other cloud providers). We will gain an understanding of the following:
- Understanding convenient scenarios for the MQTT protocol
- Working with the publish-subscribe pattern
- Working with message filtering
- Understanding the MQTT puzzle: clients, servers, and connections
- Installing a Mosquitto server on Linux
- Installing a Mosquitto server on macOS
- Installing a Mosquitto server on Windows
- Considerations for running a Mosquitto server in the cloud