Subject:
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Re: more on Zigbee
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 8 Jun 2005 20:22:02 GMT
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Original-From:
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Russell Nelson <nelson@crynwr.com%spamcake%>
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Viewed:
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1408 times
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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.
--
--My blog is at blog.russnelson.com | If you want to find
Crynwr sells support for free software | PGPok | injustice in economic
521 Pleasant Valley Rd. | +1 315-323-1241 cell | affairs, look for the
Potsdam, NY 13676-3213 | +1 212-202-2318 VOIP | hand of a legislator.
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Message is in Reply To:
 | | more on Zigbee
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| (...) Good question. I was comparting BT to other RF systems. But you won't typically run your motors at 100% load all the time, either. So typically on a Lego bot, motors will be the main power users. Add BT to a Lego Bot and the battery life will (...) (19 years ago, 1-Jun-05, to lugnet.robotics)
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