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My friend Jim caught word that I was writing a ZigBee-related book. Knowing that I have
only written about technical things in the past, Jim asked why I was writing about an obscure
1930's magician. I've never heard of the Great ZigBee but Jim must have come across him
somewhere in his travels.
This book is not a collection of magic tricks and illusions. (Although sometimes I think that
RF engineering is an illusion. Think about it. Why do you have to shield RF stuff? Maybe
because something very, very evil is going on inside the box? Hmmm...) This book is all
about teaching you about the IEEE 802.15.4 specification and how you can apply it to your
own projects using IEEE 802.15.4-compliant development tools and radios. As you will find
out, IEEE 802.15.4 and ZigBee are not one and the same. So, as we discuss the nuts and bolts
of IEEE 802.15.4, we'll also discuss the components that comprise ZigBee.
Not too many computing gadgets are restricted by wires these days. Just look at the do-it-all
wireless camera-toting, spreadsheet-running, text-messaging, internet-browsing, emailing
platform we call a cell phone. The do-it-all-with-RF philosophy of today's cell phones has
spread to the ISM (Industrial, Scientific and Medical) sector. Sensors, test equipment and
medical instruments are cutting the wires and replacing them with small short-range networks
that require little human intervention to operate. In most cases, these small networks are
based on the IEEE 802.15.4 specification. There are an unlimited number of additional applications
for small IEEE 802.15.4 networks and that's why I believe IEEE 802.15.4 networks
and ZigBee are working solutions that engineers will adapt into our everyday lives for many
years to come.
As I write these words, the ZigBee Alliance is tweaking their ZigBee specification. That's
OK. Change is sometimes good. On the IEEE 802.15.4 side, those guys and gals are in the
Bahamas. Things ain't gonna change too quickly over there. What that means is that the backbone
of a ZigBee network, IEEE 802.15.4 networking, won't be changing significantly even
though ZigBee may be going through a phase of expansion and change. Rest assured that
when you finish this book you will know enough about IEEE 802.15.4 and ZigBee to make
intelligent design decisions, no matter what the ZigBee protocol finally turns out to be.
While we're on the subject of protocols, many of you have asked when my 802.11 g book will
be available. Well, don't hold your breath. I had to pull hen's teeth to put the 802.11 b book
together, as no one in the industry would step forward to help me with the technical details of |
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eetop公众号
创芯大讲堂
创芯人才网
发表于 2008-11-22 16:10:09
楼主
