Summary

In this chapter, you've been shown how you can use CoAP to publish RESTful interfaces for your devices. You've learned the basic principles behind CoAP and DTLS, its strengths and limitations, as well as the basics for the new observe or event subscription pattern. You've encoded content in CoAP, published sensor data and created observable resources and triggered events. You've also published control parameters and learned how to discover resources on a device. You know how to test your resources, and how to secure them using encryption, authentication, and authorization. In the next chapter, you will learn how the Lightweight Machine-to-Machine, or LWM2M, protocol can be used to provide your CoAP devices with an interoperability layer, making it easier to interact with CoAP devices from different manufacturers.