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Mastering Internet of Things

You're reading from   Mastering Internet of Things Design and create your own IoT applications using Raspberry Pi 3

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Product type Paperback
Published in Mar 2018
Publisher Packt
ISBN-13 9781788397483
Length 410 pages
Edition 1st Edition
Concepts
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Author (1):
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Peter Waher Peter Waher
Author Profile Icon Peter Waher
Peter Waher
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Toc

Table of Contents (18) Chapters Close

Preface 1. Preparing Our First Raspberry Pi Project FREE CHAPTER 2. Creating a Sensor to Measure Ambient Light 3. Creating an Actuator for Controlling Illumination 4. Publishing Information Using MQTT 5. Publishing Data Using HTTP 6. Creating Web Pages for Your Devices 7. Communicating More Efficiently Using CoAP 8. Interoperability 9. Social Interaction with Your Devices Using XMPP 10. The Controller 11. Product Life Cycle 12. Concentrators and Bridges 13. Using an Internet of Things Service Platform 14. IoT Harmonization 15. Security for the Internet of Things 16. Privacy 17. Other Books You May Enjoy

Communicating More Efficiently Using CoAP

In the previous two chapters, you learned how to use the HTTP protocol to publish your data and to interact with your devices. But HTTP has some limitations when it comes to resource-constrained devices: it is very verbose and consumes a lot of bandwidth compared to the amount of data being transported.

In this chapter, you'll learn how to use the Constrained Application Protocol, or CoAP, to create interfaces for resource-constrained devices, typically devices in networks where bandwidth is an issue. The chapter covers:

  • An introduction to the CoAP protocol
  • Security in CoAP
  • Content encoding in CoAP
  • Publishing data using CoAP
  • The Observe or Event Subscription communication pattern
  • Responding to control actions using CoAP
  • Testing your CoAP devices
  • Encrypting your CoAP devices
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