 | | Re: BlueTooth bad, Zigbee good
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| (...) Anytime you have something listening for signals to wake up on, it will consume power. Even at 5 or 10 mA, you'll run through a standard AA battery pretty quickly - never mind coin cells. (...) When it came out, it was pretty cutting edge - in (...) (19 years ago, 1-Jun-05, to lugnet.robotics)
| | | | | Re: BlueTooth bad, Zigbee good
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| On Wed, June 1, 2005 12:29 pm, Bruce Boyes said: (...) You mean compaired to other comm devices, or compaired to a couple motors? I'd think if you have a moble robot, the motors are going to use much more power than anything else, right? (...) From (...) (19 years ago, 1-Jun-05, to lugnet.robotics)
| | | | | 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)
| | | | | Re: wireless sensors, and battery life: time synch
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| (...) Yes -- and this is exactly Zigbee's target. BT was originally aimed at PC, PDA, peripheral communication, and it could have done well at that. Now I think it is eclipsed by the low cost and 10-100X better speed of 801.11b/g. Zigbee has from (...) (19 years ago, 2-Jun-05, to lugnet.robotics)
| | | | | Re: more on Zigbee
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| Bruce Boyes writes: > What about sensors? Show me a BT environmental sensor.... > Here are Zigbee sensors available today: > (URL) this: (URL) > Zigbee is an IEEE standard - 802.15.4 - so that reflects some > maturity already. Welllll...... Zigbee (...) (19 years ago, 8-Jun-05, to lugnet.robotics)
| | | | | Re: wireless sensors, and battery life: time synch
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| "Bruce Boyes" <lego-robotics@crynwr.com> wrote in message news:6.2.1.2.2.20050...ion.com... (...) maybe it should be done in the same way as rfid id cards let's say when controler wants to wake the sensor up it sends the signal and the sensor (all (...) (19 years ago, 11-Jun-05, to lugnet.robotics)
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