Cellular Internet of Things for Practitioners

Abstract

After becoming familiar with various IoT application protocols in Chapter 4, the MQTT function lab will show how to configure the LTE-M module to act as a MQTT client/subscriber and exchange data with a broker. The broker will be built on a computer using Node-RED programming tool to wire together hardware devices, and online services to establish a communication with the LTE-M module. The data published on the broker will be sent to the MQTT clients that have subscribed to the topic. Finally, Microsoft Azure IoT Hub is introduced which is a cloud managed service acting as a central message hub for two-way secure communication between the IoT application and the IoT device it manages. In Chapter 6, you will learn how to use the Node-RED flow to establish a connection between the Microsoft Azure IoT platform and the IoT device. Once the data is received by Microsoft Azure, different components can be utilized to visualize and analyze the data to create actionable insight.