MQTT Essentials - A Lightweight IoT Protocol

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "If a client specifies and empty value as the ClientId."

A block of code is set as follows:

# Replace localhost with the IP for the Mosquitto
# or other MQTT server
mqtt_server_host = "localhost"
mqtt_server_port = 8883
mqtt_keepalive = 60

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

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