Inside the Broker

Build a study MQTT broker and a Sparkplug B edge node in Python, and learn MQTT 3.1.1 and Sparkplug B from the inside out: packet types, the remaining-length encoding, CONNACK codes, keepalive, the will message, Sparkplug B topics and message types, and the sequence rules that keep a host and an edge node in step.

Every listing printed in the book is tested code. Standard library Python 3.11 or later, with no broker to install. Companion code is at github.com/cbvance/InsideTheBroker.