Ted sent along this link to a redesign of the telos. This one uses the CC1101 and has some new power management capabilities.
December 28, 2009
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The actual link is this:
http://sensorweb.vancouver.wsu.edu/research/TelosW.html
The bad news is that the cc1101 (like earlier sub-Ghz radios in this line) might need an external antenna rather than a a tiny on-board one. But, maybe I’m wrong. Look at these comments:
http://forum.sparkfun.com/viewtopic.php?p=57626
The reason you might get longer range is pretty simple: tradeoff data rate (that is, when the width of a symbol is big, then you can go longer range, but with fewer symbols per second). A disadvantage of low data rates in our application is the potential for high collision rates in dense deployments.
We might want to look into this a bit more, though glancing at the cc1101 datasheet shows me there would be quite a few problems in the radio stack to overcome. I didn’t look at the radio stack implementation of TelosW.
Complicated decision process for this, but worth knowing about.
Comment by tedherman — January 10, 2010 @ 7:06 pm