In this chapter, you were provided with a brief overview of the Web and the protocols and components that have been used to build the Web. You have seen how to apply HTTP to sensors, actuators, and controllers. You have also learned how to utilize its strengths and compensate for some of its weaknesses. You have used the request/response pattern and used delayed responses to simulate event notification. You have also applied basic security by authenticating users and maintaining sessions. Finally, you also implemented web services for interoperable automation.

In the next chapter, you will learn about how the HTTP protocol has been extended and used by Universal Plug and Play (UPnP) to provide a means for automatic device-and-service discovery and an alternative method for event notification.