December 2010
Intermediate to advanced
318 pages
8h 43m
English
Content preview from Building Wireless Sensor NetworksBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 7. Over the Borders
ZigBee is only one of the great flavors of networking. In this chapter we learn to make gateways that cross borders to connect with neighboring networks, including a remarkably easy path to the Internet. You’ll see full examples, showing how to allow anything to talk to everything everywhere; plus there’s something special for you starry-eyed celebrity fans. Let this chapter be your passport.
Gateways
The great thing about standards is there are so many of them. Bluetooth, IPv6, UDP, ZigBee, SMS, VoIP, WiFi, Ethernet, 4G, SMTP, and TCP/IP all define different networking protocols and layers within those protocols. There’s no such thing as a perfect network; that’s why there are so many different ways to get networking done. Each protocol is designed to solve a specific type of problem. Most do a great job at their task. For example, Bluetooth performs solidly when connecting up eight local devices as a personal area network. At the same time, many of the engineering choices that solve one kind of problem create barriers when the protocol is pushed into unfamiliar territory. Bluetooth’s simple pairing and addressing schemes don’t readily scale to networks of hundreds or thousands of nodes, while other protocols may sacrifice such simplicity for flexibility and scalability. Luckily, there’s no need to stick to a single protocol. Each can do what it’s best at, and connections can be made so they all work well together. Using the best network means using many ...
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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.
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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.