CHAPTER 3 ■ COMMUNICATION PROTOCOLS
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Understanding MQTT is important for building IoT applications, so let’s take a look
at a few scenarios that will help you understand MQTT.
Intrusion Detection System
A simple version of an intrusion detection system is shown in Figure 3-5 . It will consist of
three components—the motion sensors that detect intrusions and publish data, a mobile
app that receives this data and alerts the app user, and the component, which is a topic
on an MQTT broker.
Figure 3-4. The MQTT protocol
Figure 3-5. Components of the intrusion detection system
43
Understanding MQTT is important for building IoT applications, so let’s take a look
at a few scenarios that will help you understand MQTT.
Intrusion Detection System
A simple version of an intrusion detection system is shown in Figure 3-5 . It will consist of
three components—the motion sensors that detect intrusions and publish data, a mobile
app that receives this data and alerts the app user, and the component, which is a topic
on an MQTT broker.
Figure 3-4. The MQTT protocol
Figure 3-5. Components of the intrusion detection system