June 2021
Intermediate to advanced
421 pages
10h 56m
English
Content preview from Programming the Internet of Things
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Chapter 9. CoAP Client Integration
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This chapter continues our exploration of CoAP with a discussion of the client implementation—specifically, within the CDA, with some guidance on building a CoAP client within your GDA as well.
What You’ll Learn in This Chapter
Chapter 8 discussed the basics of CoAP and developing a server hosted within the GDA, with an optional set of exercises enabling a CoAP server within the CDA. This chapter focuses on building a CoAP client that will be part of the CDA, with optional exercises enabling the GDA to support a CoAP client. If you implement the exercises in this chapter, you’ll learn how to integrate CoAP client functionality into your CDA (and optionally into your GDA) so it can communicate with the GDA’s CoAP server.
Design Concepts
Let’s quickly review the two client connection examples discussed in Chapter 8, with some minor modifications to each example. We’ll discuss them in more detail in this chapter—that is, the CDA as the CoAP client and the GDA as the CoAP server.
Example A-1: The CDA writes telemetry updates to the GDA’s CoAP server.
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The CDA will write new data to a single resource hosted within the GDA’s CoAP server. This resource’s name will be PIOT/ConstrainedDevice/SensorMsg.
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The CDA will connect to the ...
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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.