Download Learning Internet of Things by Peter Waher PDF

By Peter Waher

This booklet begins through exploring the preferred HTTP, UPnP, CoAP, MQTT, and XMPP protocols. you'll find out how protocols and styles can placed boundaries on community topology and the way they have an effect on the path of communique and using firewalls. factor registries and delegation of belief are brought as vital instruments to safe the lifestyles cycle of items on the web. as soon as the basics were mastered, your spotlight will movement to the web of items structure. a safe structure is proposed that would take complete benefit of the ability of net of items and while defend finish consumer integrity and personal own information with no wasting flexibility and interoperability.

This ebook will give you a pragmatic assessment of the present protocols, verbal exchange styles, architectures, and safety concerns vital to web of items.

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Extra info for Learning Internet of Things

Example text

By doing this, the sensor does not lose data if Raspberry Pi is restarted. IoT library. There, sensor data consists of a collection of nodes that report data ordered according to the timestamp. For each timestamp, a collection of fields is reported. There are different types of fields available: numerical, string, date and time, timespan, Boolean, and enumeration-valued fields. Each field has a field name, field value of the corresponding type and the optional readout type (if the value corresponds to a momentary value, peak value, status value, and so on), a field status, or Quality of Service value and localization information.

Yet HTTP has become much more than navigation between pages on the Internet. Today, it is also used in machine to machine (M2M) communication, automation, and Internet of Things, among other things. So much is done on the Internet today, using the HTTP protocol, because it is easily accessible and easy to relate to. For this reason, we are starting our study of Internet of Things by studying HTTP. This will allow you to get a good grasp of its strengths and weaknesses, even though it is perhaps one of the more technically complex protocols.

Since we send text back, we also have to choose a text encoding. We choose the UTF8 encoding, which is common on the Web. We also make sure to inform the client, that the operation was successful, and that the OK status code (200) is returned. Momentary=1'>"); ("View data as RDF using REST

"); ("

  • "); ("Data in a HTML page with graphs
  • "); (""); And then we are done! info The HTTP Protocol Displaying measured information in an HTML page We are now ready to display our measured information to anybody through a web page (or HTML page).

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