June 2021
Intermediate to advanced
421 pages
10h 56m
English
Content preview from Programming the Internet of Things
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Chapter 7. MQTT Integration–Java Client
Wash, rinse, and repeat.
What purpose does it now serve?
Practice makes perfect!
This chapter continues with the patterns established in Chapter 6, but with a focus on building your MQTT client connection logic within the GDA. This will eventually be used to support integration between the CDA and the GDA and will also lay the groundwork for the GDA to communicate with one or more cloud services using MQTT.
What You’ll Learn in This Chapter
You’ll continue digging into MQTT fundamentals, but this time you’ll focus on building out your GDA functionality via integration with an open source MQTT library. Not only will this allow you to test your gateway and eventually integrate with remote cloud services that implement the MQTT protocol via a hosted broker, but it will also enable you to talk to the CDA in a reliable manner.
You’ll see how MQTT can be used to push updates to one or more devices (such as your CDA) via a gateway (your GDA) and learn how to do so using an open source MQTT Java client library.
Programming Exercises
The steps you need to take to integrate MQTT with your GDA are nearly identical to those ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.