Re: more on Zigbee

Bruce Boyes writes:
 > What about sensors? Show me a BT environmental sensor....
 > Here are Zigbee sensors available today:
 > http://www.xbow.com/Products/productsdetails.aspx?sid=101

Or this:  http://russnelson.com/wisan/

 > Zigbee is an IEEE standard - 802.15.4 - so that reflects some
 > maturity already.

Welllll......  Zigbee is three protocol layers built on top of
802.15.4.  Zigbee is a trademark, whereas 802.15.4 is not.  The Zigbee
standard is only available to members at a five-figure cost, whereas
802.15.4 is available at nominal cost.  Zigbee is a great name, and
much more pronouncable than IEEE 802.15.4, but they're not the same
thing.

 > But the bottom line is I don't have any axe to grind. My purpose in 
 > emailing was to let people know that Zigbee is a much better RF system for 
 > new robot and embedded control designs:

Yup.  20ma continuous operation, 300 foot open-air range (measured),
50 foot range in an EXTREMELY RF-noisy environment.

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